Faculty

Arturo Leon
Dr. Arturo S. Leon, Ph.D., P.E., D.WRE
Associate Professor
Office Location: N134 Engineering Bldg 1, Houston, TX 77204-4003
Phone: 713-743-8641 | Fax: 713-743-4260
Email: aleon3 [at] uh [dot] edu

Education: 

Ph.D., Civil and Environmental Engineering, University of Illinois at Urbana-Champaign
M.S., Hydraulic Engineering, National University of Engineering, Peru
C.E., Civil Engineering, Nat. Univ. of San Cristobal de Huamanga, Peru
B.S., Civil Engineering, Nat. Univ. of San Cristobal de Huamanga, Peru

Professional Experience: 

Sept. 2016-present: Associate Professor, Department of Civil and Environmental Engineering, University of Houston, TX
Jan. 2011-Aug. 2016: Assistant Professor, School of Civil and Construction Engineering, Oregon State University, OR
Sept. 2009-Dec. 2010: Assistant Professor, Department of Civil Engineering Boise State University, ID
Apr. 2007-Aug. 2009: Post-doctoral Research Associate, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, IL
Sept. 2002-Mar. 2007: Graduate Research Assistant, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, IL
Aug. 2000-July 2002: Staff Hydrologic and Hydraulic Engineer, Knight Piesold Consulting S.A., Lima, Peru
Jan 1999-July 2000: Staff Hydraulic Engineer, COSAPI S.A., Lima, Peru
Jan. 1998-Dec. 1998: Assistant Hydraulic Engineer, Agua y Agro Asesores Asociados S.A.C., Lima, Peru
April 1997-Dec.1998: Graduate Teaching Assistant, Department of Civil Engineering, National University of Engineering, Lima, Peru

COURSES TAUGHT AT UH

  • CIVE 7397: Unsteady flows in Rivers and Pipe Networks (Course website)
  • CIVE 3434: Fluid Mechanics and Hydraulic Engineering (Course website)

COURSES TAUGHT AT OTHER INSTITUTIONS

Awards & Honors: 

Diplomate, Water Resources Engineer (D.WRE), 2014
ASCE ExCEEd Teaching Fellow, 2012
Environmental Protection Agency (EPA) Early CAREER Award, 2012
Society of Peruvian Engineers Outstanding Contributions Award, 2011
Chancellor Medal and Diploma for outstanding graduate of the Universidad Nacional San Cristobal de Huamanga, 2008
Research Fellowship at the Hong Kong University of Science and Technology, China (six weeks), 2004
Peruvian National Council of Science and Technology fellow, 1997-1998
Fellowship to attend the Peruvian National Annual Conference of Executives (Peru), 1996
Best undergraduate student award of Civil Engineering, 1992-1996 (5 years in a row)

Research Interests: 

RESEARCH OPPORTUNITIES: 

Every year we have a couple of PhD student positions available. We are interested in highly motivated and academically talented students from various disciplines (e.g., Applied Mathematics, Mechanical Engineering, Computer Science, Electrical Engineering, Civil Engineering, etc.) with research interests in hydraulic transients (single- and two-phase flows), resilient approaches to flood control, optimal reservoir operation under uncertainty, sustainable stormwater management and modeling, real-time control of hydraulic systems, computational hydraulics (CFD ) or physical modeling of hydraulic structures. Please contact aleon3 [at] uh [dot] edu (Dr. Arturo S. Leon (aleon3 [at] uh [dot] edu)) with your CV, including GPA and GRE scores (and TOEFL scores, if applicable).  Visiting scholars are also encouraged to contact Dr. Leon regarding research opportunities.

INVITED-KEYNOTE

  • Keynote Talk, XXIV Congreso Nacional de Estudiantes de Ingenieria Civil del Perú (http://coneic2016.com/), Ayacucho, Peru, “State-of-the-art strategies on flood mitigation, reservoir operation and control of geyser eruptions in stormwater and combined sewer systems,” August 2016
  • Keynote Talk, Pacific Northwest Waterways Association (PNWA) Summer Conference, Hood River, OR, “Development of a Computational Framework for the Optimal Control of Multi-Reservoir Systems Under Uncertainty: Application to the Columbia River System”, June 2015
  • Keynote Talk, X Congreso Latinoamericano de Estudiantes de Ingenieria Civil - XXII Congreso Nacional de Estudiantes de Ingenieria Civil del Perú (http://www.coleic-coneic2014.com/), Arequipa, Peru, “Recent advances on Flood Control, Reservoir Operation and Transient Flows,” August 2014

INVITED-OTHER

  • Invited Talk, Technology Innovation Summit, Bonneville Power Administration, Portland, OR, “Framework for Quantification of Risk and Valuation of Flexibility in the Federal Columbia River Power System (FCRPS),” January 2016.
  • Invited Talk, Changjiang River Scientific Research Institute (CRSRI), Wuhan, Hubei, China, “Recent Advances on Flood Control and Reservoir Operation”, May 2015. 
  • Invited Talk, Winter Seminar Series, Water Resources Graduate Program, Oregon State University, Corvallis, OR,“Development of Computer Models for the Optimal Control of Multi-Reservoir Systems Under Uncertainty: Application to the Columbia River System, March 2015
  • Invited Talk, Technology Innovation Summit, Bonneville Power Administration, Portland, OR, “Development of a computational framework and platform for the optimal control of multi-reservoir systems under uncertainty,” January 2015
  • Invited Talk, Geosyntec, Portland, OR, “Stormwater and Reservoir Operation Research and Potential Collaborations between OSU and Geosyntec,” June 2014
  • Invited Talk, Technology Innovation Summit, Bonneville Power Administration, Portland, OR, “Development of a computational framework and platform for the optimal control of multi-reservoir systems under uncertainty,” January 2014
  • Invited Talk, EPA RESEARCH FORUM: Extreme Event Impacts on Air Quality and Water Quality with a Changing Global Climate, Arlington, VA, “Prediction and quantification of CSOs under extreme storm events: Flow dynamics and Reduction of CSOs,” February 2013
  • Invited Talk, Technology Innovation Summit, Bonneville Power Administration, Portland OR “Development of a computational framework and platform for the optimal control of multi-reservoir systems under uncertainty,” January 2013
  • Invited Talk, Reservoir System Modeling Technologies Conference, Bonneville Power Administration, Portland, OR, “A Computationally Efficient and Robust Approach for Multi-objective Operation of Multi-reservoir systems Subjected to Multiple Constraints,” February 2012
  • Invited Talk, Winter Seminar Series, Department of Mathematics, Oregon State University, Corvallis, OR, “Towards the intelligent control of river flooding. Harmonizing long-term objectives with the flooding objective,” February 2012
  • Invited Talk, Universidad Nacional San Cristobal de Huamanga, Ayacucho, Peru, “Real-time Control of Multi-Objective and Multi-Reservoir Systems,” December 2011
  • Invited Talk, Universidad Nacional de Ingenieria, Lima, Peru, “Real-time Control of Multi-Objective and Multi-Reservoir Systems,” December 2011
  • Invited Talk, Bonneville Power Administration (BPA), Portland, Oregon, “Towards Real-time Control of Multi-objective and Multi-Reservoir Systems,” October 2011
  • Invited Talk, Ecosystem Informatics at Oregon State University (IGERT), Corvallis, OR, “Towards Real-time Control of Multi-objective and Multi-Reservoir Systems,” May 2011
  • Invited Talk, Universidad Nacional de Ingenieria, Lima, Peru, “Modeling of Combined Sewer Systems,” December 2010
  • Invited Talk, Montgomery Watson and Harza Engineering (MWH), Denver, CO, “Modeling of Unsteady Flows using HEC-RAS,” July 2010
  • Invited Talk, Oregon State University, Corvallis, OR, “Towards Real-time Control of Reservoir Systems,” May 2010
  • Invited Talk, University of Idaho, Boise, Idaho, “Application of Genetic Algorithms to the Operation of Reservoir Systems,” May 2010
  • Invited Talk, Boise State University, Boise, ID, “Towards Real-time Control of Combined Sewer Systems,” March 2009
  • Invited Talk, University of Illinois at Urbana-Champaign, Urbana, IL, “A mathematical and numerical model for the simultaneous occurrence of free surface and pressurized flows,” May 2006
  • Invited Talk, Universidad Nacional de Ingenieria, Lima, Peru, “Transient flows in Combined Sewer Systems,” December 2005
  • Invited Talk, I Conference in Hydraulics of Rivers and Channels, Lima, Peru, “Special Topics in Unsteady Flows and its Applications to Hydraulic Engineering,” December 2004
  • Invited Talk, I Conference in Hydraulics of Rivers and Channels, Lima, Peru, “Special Topics in Unsteady Flows and its Applications to Hydraulic Engineering,” December 2004
  • Invited Talk, Universidad Nacional San Cristobal de Huamanga, Ayacucho, Peru, “Unsteady transition between free surface and pressurized flows (In Spanish),” December 2004

NON-INVITED (CONTRIBUTED TALKS)

  • Contributed Talk, 6th International Symposium on Hydraulic Structures, Portland OR, “Determining Optimal Discharge and Optimal Penstock Diameter in Water Turbines,” June 2016.
  • Contributed Talk, 6th International Symposium on Hydraulic Structures, Portland OR, “A Remotely Controlled Siphon System for Dynamic Water Storage Management,” June 2016.
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, West Palm Beach, FL, “New Evidences on the Causes of Explosives Geysers in Stormwater and Combined Sewer Systems: A Simplified Model for Prediction of These Geysers,” May 2016.
  • Contributed Talk, International Conference on Water Management Modeling, Toronto Canada, “New insights on the causes of explosives geysers in stormwater and combined sewer systems: A model for their prediction.,” February 2016
  • Contributed Talk, American Geophysical Union Fall Meeting, San Francisco CA, “Minimizing water consumption when producing hydropower,” December 2015.
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Portland OR, “Effects of Small Tidal-type Waves on Rating Curves in Rivers,” June 2014.
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Portland, OR, “A Dimensional Analysis for Determining Optimal Discharge and Optimal Penstock Diameter in Impulse and Reaction Water Turbines,” June 2014.
  • Contributed Talk, AWRA Annual Water Resources Conference, Portland, OR, “Development of a State-of-the-Art Computational Framework for the Optimal Control of Multi-Reservoir Systems Under Uncertainty,” November 2013.
  • Contributed Talk, City of Portland, Environmental Services, Portland OR, “Flow Dynamics in Combined Storm-sewer Systems. Modeling needs and Application of the Illinois Transient Model (ITM),” October 2013.
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Cincinnati, OH, “A Framework for Propagation of Uncertainty in River Systems,” May 2013
  • Contributed Talk, XIX International Conference on Computational Methods in Water Resources (CMWR), Urbana, IL, “Toward Reduction of Uncertainty in Complex Multi-reservoir River Systems,” June 2012
  • Contributed Talk, XIX International Conference on Computational Methods in Water Resources (CMWR), Urbana, IL, “Towards the Intelligent Control of River Flooding. Harmonizing Long-term Objectives (e.g., irrigation, hydropower) with the Flooding Objective,” June 2012
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Albuquerque, NM, “A Robust, Numerically Efficient Model for Unsteady Flow Routing in Topologically Complex River Networks,” May 2012
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Albuquerque, NM, “Towards the Intelligent Control of River Flooding,” May 2012
  • Contributed Talk, Oregon Water Conference, Corvallis, OR, “A Novel Physically-based Framework for the Intelligent Control of River Flooding,” May 2011
  • Contributed Talk, Watershed Management Conference, Theme: "Innovations in Watershed Management Under Land Use and Climate Change", Madison, WI, “A New Coupled Optimization-hydraulic Routing Model for Real-time Operation of Highly Complex Regulated River Systems,” August 2010
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Providence, RI, “Flow Dynamics in Combined Storm-Sewer Systems: Application of the Illinois Transient Model (ITM) to the Calumet TARP System in Chicago, Illinois,” May 2010
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Kansas City, MO, “A Robust and Fast Model for Simulating Street Flooding,” May 2009
  • Contributed Talk, ASCE-EWRI World Environmental & Water Resource Congress, Kansas City, MO, “Boundary Conditions for Simulating Complex Storm-sewer Systems in Free Surface, Pressurized, and Mixed Flow Conditions,” May 2009
  • Contributed Talk, 10th International Conference on Pressure Surges, BHR Group, Edinburgh, United Kingdom “A Shock-capturing Approach for Simulating Gravity Flows, Pressurized Flows and the Simultaneous Occurrence of Gravity and Pressurized Flows,” May 2008
  • Contributed Talk, World Water and Environmental Resources Congress, Honolulu HI, “A Finite Volume Model for Mixed Free Surface-pressurized Flows in Drainage Systems,” May 2008
  • Contributed Talk, World Water and Environmental Resources Congress, Honolulu HI, “Experimental and CFD Modeling of a Vortex Flow Restrictor,” May 2008
  • Contributed Talk, 5th International Symposium on Environmental Hydraulics, Tempe AZ “Godunov-type Solutions for Two-phase Water Hammer Flows,” December 2007
  • Contributed Talk, Contemporary Modeling of Urban Water Systems, Toronto Canada, “An efficient finite-volume scheme for modeling water hammer flows.,” February 2007
  • Contributed Talk, Annual Illinois Water Conference, Urbana IL, “Towards Modeling for Real-time Control of Combined Sewer Overflow Systems: Application to the Calumet TARP System in Chicago, Illinois,” October 2006
  • Contributed Talk, I International Congress of Hydraulics, Hydrology and Environment, Lima, Peru “Efficient Numerical Modeling of One and Two-phase Transient Flows (In Spanish),” June 2006
  • Contributed Talk, I International Congress of Hydraulics, Hydrology and Environment, Lima, Peru, “New Numerical Model for the Simultaneous Simulation of Unsteady Free Surface and Pressurized Flows (In Spanish),” June 2006
  • Contributed Talk, World Environmental & Water Resources Congress, Omaha NE, “An Efficient Numerical Scheme for the Modeling of Two-phase Bubbly Homogeneous Air-water Mixtures,” May 2006
  • Contributed Talk, XXXI IAHR Congress, Seoul, Korea, “Importance of Numerical Efficiency for Real-Time Control of Transient Gravity Flows in Sewers,” September 2005
  • Contributed Talk, XIV National congress of Civil Engineering, Iquitos, Peru, “One-dimensional Modeling of the Intrusion of Contaminants for Conservative Substances in Non-permanent and Non-uniform Flows (In Spanish),” September 2003
  • Contributed Talk, Instituto de la Construcción y Gerencia, Lima, Peru, “Alternative of Hydraulic Design for Intakes in Steep Rivers and Large Transport of Boulders (In Spanish),” August 2002
  • Contributed Talk, XII National congress of Civil Engineering, Huánuco, Peru, “Local Scour around Cylindrical Piers in Non-cohesive Beds (In Spanish),” September 1999

PARTICIPATION AT INVITATIONAL WORKSHOPS

  • ExCEEd Teaching Workshop, American Society of Civil Engineers (ASCE), United States Military Academy at West Point, New York, July 2012.
  • CMMI CAREER Proposal Writing Workshop, National Science Foundation, University of Nevada, Reno, March 2012

Refereed Journal Publications: 

Oberg N., Schmidt, A. R., Landry, B. J., Leon, A. S., Waratuke, A. R., Mier, J. M. and García, M. H. (2016) “Improved understanding of combined sewer systems using the Illinois Conveyance Analysis Program (ICAP).” Urban Water Journal, Accepted (wrote the original HPG code and provided significant text and discussion).
Leon, A. S. and Goodell C. (2016) .“Controlling HEC-RAS using MATLAB” Journal of Environmental Modelling and Software, 84, 339-348. (Developed 100% of the code and provided 95% of the text)
Leon, A. S. (2016). “Mathematical models for quantifying eruption velocity in degassing pipes based on exsolution of a single gas and simultaneous exsolution of multiple gases” Journal of Volcanology and Geothermal Research, 323, 72–79.
Chen, D., Chen, Q., Leon, A. S., and Li, R. (2016). “A Genetic Algorithm Parallel Strategy for Optimizing the Operation of Reservoirs with Multiple Eco-environmental Objectives” Water Resources Management, 30(7), 2127–2142. (Provided significant text and discussion).
Chen, D., Leon, A. S., Gibson, N., and Hosseini, P. (2016) “Dimension reduction of decision variables for multireservoir operation: A spectral optimization model.” Water Resources Research, 52(1), 36–51 (provided significant text and discussion – Impact Factor 3.55).
Lowe, R. J., Leon, A. S., Symonds, G., Falter, J. L., Gruber, R. (2015). “The intertidal hydraulics of tide-dominated reef platforms.” Journal of Geophysical Research - Oceans, 120(7), 4845–4868 (derived the analytical solutions and provided 20% of the text and discussion – Impact Factor 3.44). Available at http://onlinelibrary.wiley.com/doi/10.1002/2015JC010701/pdf
Nania, L. S., Leon, A. S., and Garcia, M. H. (2015). “Hydrologic-Hydraulic Model for Simulating Dual Drainage and Flooding in Urban Areas: Application to a Catchment in the Metropolitan Area of Chicago.” Journal of Hydrological Engineering, 20(5), 04014071-1 – 04014071-13 (developed the hydraulic code and provided 40% of the text and discussion – Impact Factor 1.62)
Leon, A. S., Zhu, L. (2014). “A dimensional analysis for determining optimal discharge and penstock diameter in impulse and reaction water turbines.” Renewable Energy, 71, 609–615 (provided 95% of the text and developed the MATLAB sofware – Impact Factor 3.36)
Gibson, N. L., Gifford-Miears, C., Leon, A. S., Vasylkivska, V. S. (2014). “Efficient computation of unsteady flow in complex river systems with uncertain inputs.” International Journal of Computer Mathematics, 91(4), 781-797. DOI: 10.1080/00207160.2013.854336 (provided 20% of the text and helped in the development of the hydraulics code – Impact Factor 0.72)
Leon, A. S., Kanashiro, E. A., Valverde, R., and Sridhar V. (2014) “Dynamic Framework for Intelligent Control of River Flooding - Case Study.” Journal of Water Resources Planning and Management, 140(2), 258-268 (provided 60% of the text and developed 50% of the hydraulics and optimization code – Impact Factor 1.76)
Leon A. S., Kanashiro E. A., and Gonzalez-Castro J. A. (2013), “Fast Approach for Unsteady Flow Routing in Complex River Networks Based on Performance Graphs”, Journal of Hydraulic Engineering, 139(3), 284-295 (provided 70% of the text and developed most of the hydraulics code – Impact Factor 1.26)
Leon, A. S. and Gifford-Miears, C. H. and Choi, Y. (2013) “Well-balanced scheme for modeling open-channel and surcharged flows in steep-slope closed conduit systems.” Journal of Hydraulic Engineering, 139(4), 374-384 (provided 80% of the text and developed the transient flow code – Impact Factor 1.26)
Leon, A. S., Oberg N., Schmidt, A. R., and García, M. H. (2011). “The Illinois Transient Model. A state-of-the-art model for simulating the flow dynamics in combined storm-sewer systems”. Urban Water Systems, Monograph 19 (provided 95% of the text and developed most of the transient flow code – No Impact Factor)
Leon, A. S., Liu, X., Ghidaoui, M. S., Schmidt, A. R., and Garcia, M. H. (2010) “Junction and drop-shaft boundary conditions for modeling free-surface, pressurized, and mixed free-surface pressurized transient flows.” Journal of Hydraulic Engineering, 136(10), 705-715 (provided 90% of the text and all 1D transient flow simulations – Impact Factor 1.26)
Leon, A. S., Ghidaoui, M. S., Schmidt, A. R. and Garcia, M. H. (2010) “A Robust two-equation model for transient mixed flows.” Journal of Hydraulic Research, 48(1), 44-56 (provided 95% of the text and developed the 1D boundary contransient flow code – Impact Factor 1.347)
Leon, A. S., Ghidaoui, M. S., Schmidt, A. R. and Garcia, M. H. (2009) “Application of Godunov-type schemes to transient mixed flows.” Journal of Hydraulic Research, 47(2), 147-156 (provided 95% of the text and developed the transient flow code – Impact Factor 1.347)
Leon, A. S., Ghidaoui, M. S., Schmidt, A. R. and Garcia, M. H. (2008) “Efficient second-order accurate shock-capturing scheme for modeling one and two-phase water hammer flows.” Journal of Hydraulic Engineering, 134(7), 970-983 (provided 95% of the text and developed the transient flow code – Impact Factor 1.26)
Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2007). “An efficient finite-volume scheme for modeling water hammer flows.'' Contemporary Modeling of Urban Water Systems, Monograph 15 (provided 95% of the text and developed the transient flow code – No Impact Factor)
Leon, A. S., Ghidaoui, M. S., Schmidt, A. R. and Garcia, M. H. (2006) “Godunov-type solutions for transient flows in sewers”. Journal of Hydraulic Engineering, 132(8), 800-813 (provided 95% of the text and developed the transient flow code – Impact Factor 1.26)

Editorial Activities / Discussions in Refereed Journals: 

Nania, L. S., Gómez, M., Dolz, J. and Leon, A. S. (2010). Discussion to “Experimental and numerical modelling of symmetrical four-branch supercritical cross junction flow” by Emmanuel Mignot, André Paquier, and Nicolas Riviere. Journal of Hydraulic Research, 48(6), 826-828. doi:10.1080/00221686.2010.512813 (provided 25% of the text and provided feedback on the entire document – Impact Factor 1.347)
Leon, A. S., and Ghidaoui, M. S. (2010) Closure to Discussion of “Application of Godunov-type schemes to transient mixed flows.” Journal of Hydraulic Research, 48(5), 688-689 (provided 90% of the text and provided feedback on the entire document – Impact Factor 1.347)
Leon, A. S., Ghidaoui, M.S. (2010). Discussion of “Numerical oscillations in pipe-filling bore predictions by shock-capturing models” by J. G. Vasconcelos, S. J. Wright, and P. L. Roe. J. Hydraulic Engng., 136(6), 392-393 (provided 90% of the text and provided feedback on the entire document – Impact Factor 1.26)
Leon, A. S., Nania, L. S. and Sridhar, V. (2010). Discussion of “Potential Dangers of Simplifying Combined Sewer Hydrologic/Hydraulic Models” by J. P. Cantone and A. R. Schmidt. J. Hydrological. Engng., 15, 587-588 (provided 80% of the text and provided feedback on the entire document – Impact Factor 1.62)

Books / Book Chapters: 

A. S. Leon (2009). “Improved Modeling of Transient Flows in Storm-sewer Systems”, ISBN 978-3-639-15213-5, VDM Verlag Dr. Müller, Germany.
A. S. Leon (2000). “Local scour around cylindrical piers in non-cohesive beds (In Spanish)”, Distribuidora Lopez G., Lima, Peru.
A. S. Leon and F. Coronado (1998). “The hydraulic design of a bottom rack-type intake in supercritical regime (In Spanish)”, W. H. Editores S.R. Ltda., Lima, Peru (primary author).
A. S. Leon, N. Oberg, A. R. Schmidt and M. H. García (2011). “The Illinois Transient Model. A state-of-the-art model for simulating flow dynamics in combined storm-sewer systems”. Urban Water Systems, Monograph 19 (primary author).
A. S. Leon, M. S. Ghidaoui, A. R. Schmidt and M. H. García (2007). “An efficient finite-volume scheme for modeling water hammer flows.''  Contemporary Modeling of Urban Water Systems, Monograph 15 (primary author).

Peer-Reviewed Conference Papers / Extended Abstracts: 

All of these papers were presented at their respective conferences. (*) identifies the presentations I made, (†) represents presentations made by students or Post-Doc that I advise(d), and the (§) represents presentations made by my collaborators.

Leon, A. S. (2016). “Determining Optimal Discharge and Optimal Penstock Diameter in Water Turbines.” In B. Crookston & B. Tullis (Eds.), Hydraulic Structures and Water System Management. 6th IAHR International Symposium on Hydraulic Structures, Portland, OR, 27-30 June (pp. x-x).  doi:10.15142/T390628160853 (ISBN 978-1-884575-75-4) (primary author). *

Leon, A. S. and Alnahit, A. O. (2016). “A Remotely Controlled Siphon System for Dynamic Water Storage Management.” In B. Crookston & B. Tullis (Eds.), Hydraulic Structures and Water System Management. 6th IAHR International Symposium on Hydraulic Structures, Portland, OR, 27-30 June (pp. x-x). doi:10.15142/T3690628160853 (ISBN 978-1-884575-75-4) (primary author).  *

Choi, Y., Leon, A. S., and Apte, S. (2016). “A One-Dimensional Numerical Model to Predict Pressure and Velocity Oscillations of a Compressed Air Pocket in a Vertical Shaft Filled with Water.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 202-211, West Palm Beach, FL, May 22-26, 2016 (contributed text and discussion).  †

Leon, A. S. (2016). “New Evidence on the Causes of Explosives Geysers in Stormwater and Combined Sewer Systems: A Simplified Model for the Prediction of These Geysers.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 224-233, West Palm Beach, FL, May 22-26, 2016.  *

Chen, D., Leon, A. S., and Hosseini P. (2016).“Patterns of Optimal Operational Schemes for the Short-Term Operation of a Multi-Reservoir System with Shifting Objectives.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 428-437, West Palm Beach, FL, May 22-26, 2016 (contributed text and discussion).  †

Choi, Y., Leon, A. S., and Apte, S. (2014). “Three-dimensional Numerical Modeling of Air-water Geyser Flows.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 1535-1548, Portland OR, June 1-5, 2014 (contributed text and discussion).  †

Chen, D., Leon, A. S., and Hosseini P. (2014). “Optimizing Short-term Operation of a Multi-reservoir System During Transition of Objectives and Constraints.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 1093-1105, Portland OR, June 1-5, 2014 (provided significant text and discussion). †

Gomez, L. A., Lee, H. W., and Leon, A. S.  (2014). “A real options-based framework to evaluate investments in river flood control under uncertainty.” In proceedings of Second International Conference on Vulnerability and Risk Analysis and Management (ICVRAM) and the Sixth International Symposium on Uncertainty, Modeling, and Analysis (ISUMA), 1465-1474, Liverpool, UK, July 13-16, 2014 (provided discussion). †

Leon, A. S., Valverde, R., and Gonzalez-Castro, J. A. (2012). “A robust, numerically efficient model for unsteady flow routing in topologically complex river networks.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 1119-1128, Albuquerque, New Mexico, May 20-24, 2012 (primary author). *

Leon, A. S., Kanashiro E. A., Gichamo, T. Z., Valverde, R., and Gifford-Miears, C. H. (2012). “Towards the intelligent control of river flooding.” In proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 1687-1696, Albuquerque, New Mexico, May 20-24, 2012 (primary author). *

Bernedo, C. E., Julien, P., Leon, A. S. (2011). “Dam Breach Analysis in Tailings Storage Facilities (TSF)” In Proceedings of the ASCE-EWRI World Environmental and Water Resources Congress, 2216-2224, Palm Springs, CA, May 2011 (provided significant text and discussion). §

Leon, A. S. “A New Coupled Optimization-Hydraulic Routing Model for Real-Time Operation of Regulated River Systems”, In Proceedings of Watershed Management, 213-224, ASCE-EWRI, August 23-27, 2010, Madison, Wisconsin (primary author). *

Leon, A. S., Choi, N. J., Schmidt, A. R., and García, M. H. (2010). “Flow Dynamics in Combined Storm-Sewer Systems: Application of the Illinois Transient Model (ITM) to the Calumet TARP System in Chicago, Illinois.” In Proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 3703-3717, Providence, Rhode Island, May 16-20, 2010 (primary author). *

Leon, A. S., Liu, X. Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2009). “Boundary Conditions for Simulating Complex Storm-sewer Systems in Free Surface, Pressurized, and Mixed Flow Conditions.” In Proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 5557-5567, Kansas City, Missouri, 2009 (primary author). *

Leon, A. S., Nanía, L. S., Schmidt, A. R., and García, M. H. (2009). “A Robust And Fast Model For Simulating Street Flooding.” In Proceedings of ASCE-EWRI World Environmental & Water Resource Congress, 5364-5373, Kansas City, Missouri, 2009,  (primary author). *

Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2008). “A Shock-capturing Approach for Simulating Gravity Flows, Pressurized Flows and the Simultaneous Occurrence of Gravity and Pressurized Flows.” In Proceedings of 10th International Conference on Pressure Surges, 489-502, BHR Group, 14-16 May, 2008, Edinburgh, United Kingdom (primary author). *

Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2008). “A finite volume model for mixed free surface-pressurized flows in drainage systems.” In Proceedings of World Water and Environmental Resources Congress, CD-ROM Edition (10 pages), Hawaii, USA, May 13-16, 2008. Permalink: http://dx.doi.org/10.1061/40976(316)671 (primary author). *

Leon, A. S., Cataño-Lopera, Y. A., Liu, X., Schmidt, A. R., and García, M. H. (2008). “Experimental and CFD modeling of a vortex flow restrictor.” In Proceedings of World Water and Environmental Resources Congress, CD-ROM Edition (10 pages), Hawaii, USA, May 13-16, 2008. Permalink: http://dx.doi.org/10.1061/40976(316)646 (primary author). *

Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2007). “Godunov-type solutions for two-phase water hammer flows.” In Proceedings of Fifth International Symposium on Environmental Hydraulics, CD-ROM Edition (7 pages), Tempe, Arizona, USA. Dec.  4-7, 2007 (primary author). *

Leon, A. S., Ghidaoui, M. S., Schmidt, A. R. and Garcia, M. H. (2006) “An efficient numerical scheme for the modeling of two-phase bubbly homogeneous air-water mixtures”. In Proceedings of World Environmental & Water Resources Congress, CD-ROM Edition, P32 (10 pages),  Nebraska, 2006 (primary author). *

Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., and García, M. H. (2005). “Importance of numerical efficiency for real time control of transient gravity flows in sewers.” In Proceedings of XXXI IAHR Congress, 1106-1115, Seoul, Korea (primary author). *

Schmidt, A. R., Ghidaoui, M. S., Leon, A. S., and García, M. H. (2005). “Review of sewer surcharging phenomena and models.” In Proceedings of XXXI IAHR Congress, 257-258, Seoul, Korea (provided significant text and discussion). §

Non-Refereed Conference and Journal Publications: 

Chen, D., Leon, A. S., Gibson, N. L., and Vasylkivska, V. S. (2014). “Using a Concurrent Hybrid Method to Optimize Short-Term Operation of a Multi-Reservoir System with Multiple Objectives”. In Proceedings of the 11th International Conference on Hydroinformatics HIC 2014, New York City, NY, August 17-21, 2014.
Hosseini P., Chen, D., Leon, A. S., Gibson, N., Hoyle C. (2014). “A Multi-objective Robust Optimization Framework for the Operation of Multi-reservoir Systems”, Presented in the ASCE-EWRI World Environmental & Water Resource Congress, Portland OR, June 1-5, 2014.
Leon, A. S., Hosseini P. (2014). “Effects of Small Tidal-type Waves on Rating Curves in Rivers”, Presented in the ASCE-EWRI World Environmental & Water Resource Congress, Portland OR, June 1-5, 2014.
Leon, A. S., Zhu L. (2014). “A Dimensional Analysis for Determining Optimal Discharge and Optimal Penstock Diameter in Impulse and Reaction Water Turbines”, Presented in the ASCE-EWRI World Environmental & Water Resource Congress, Portland OR, June 1-5, 2014.
Gomez, L., and Leon, A. S. (2014). “Investment Time for Flood Control Under Uncertainty: A Real Options-Based Framework”. 2014 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 12, 2014.
Gibson, N., Gomez, L., Leon, A. S., and Vasylkivska, V. (2014). “A Domain Decomposition Method for Unsteady Flow Routing in Complex River Systems”. 16th SIAM Conference on Parallel Processing for Scientific Computing, Portland OR, February 18-21, 2014.  
Leon, A. S., Gifford-Miears, C., and Gibson, N., Hoyle, C. (2013). “Development of a State-of-the-Art Computational Framework for the Optimal Control of Multi-Reservoir Systems Under Uncertainty”, Presented in the 2013 AWRA Annual Water Resources Conference, Portland OR, November 4-7, 2013.
Chen, D., Leon, A. S., Chen, Q. and Li, R. (2013). “Pareto-Optimal Solutions and Operational Strategies for a Multi-Objective Reservoir with Ecological and Environmental Purposes: A Case Study of Qingshitan Reservoir”, Presented in the 2013 AWRA Annual Water Resources Conference, Portland OR, November 4-7, 2013.
Leon, A. S., Gifford-Miears, C., and Gibson N. (2013). “A Framework for Propagation of Uncertainty in River Systems”, Presented in the ASCE-EWRI World Environmental & Water Resource Congress, Cincinnati OH, May 19-22, 2013.
Alam M., and Leon, A. S. (2013). “Upper Limit of Extractable Hydropower”. 2013 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 13, 2013.
Choi, Y., and Leon, A. S. (2013). “Towards Predicting the occurrence of geysers and CSOs in combined sewer systems - An experimental, theoretical and numerical approach”. 2013 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 13, 2013.
Choi, Y., Leon, A. S. (2012). “Towards predicting the occurrence of geysers and CSOs in combined sewer systems - an experimental, theoretical and numerical approach.” Presented in the 2012 Sustainable Stormwater Symposium, Portland, Oregon, September 19-20, 2012.
Bernedo, C. E., Salas, J., and Leon, A. S. (2012). “Challenges of safe and sound designs: Hydrologic design criteria in areas affected by El Niño phenomenon… Can conventional hydrology be applied?” In proceedings of the 2012 Dam Safety Conference, Association of State Dam Safety Officials, Denver, CO., September 16-21, 2012.
Leon, A. S., Gibson, N. L., and Gifford-Miears, C. H. (2012). “Toward reduction of uncertainty in complex multi-reservoir river systems.” In proceedings of the XIX International Conference on Computational Methods in Water Resources (CMWR), University of Illinois at Urbana-Champaign, Urbana, Illinois, June 17-21, 2012.
Leon, A. S., Kanashiro, E. A., Gichamo, T. Z., and Valverde, R. (2012). “Towards the intelligent control of river flooding. Harmonizing long-term objectives (e.g., irrigation, hydropower) with the flooding objective.” In proceedings of the XIX International Conference on Computational Methods in Water Resources (CMWR), University of Illinois at Urbana-Champaign, Urbana, Illinois, June 17-21, 2012.
Choi, Y., and Leon, A. S. (2012). “Minimizing Geysers and CSOs in the Portland Combined Sewer System.” 2012 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 18, 2012.
Gifford-Miears, C. H., and Leon, A. S. (2012). “Applicability of Three Dimensional Modeling in the Construction of Hydraulic Performance Graphs for Unsteady Flow Routing in Complex River Networks.” 2012 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 18, 2012.
Gomez, L.A., and Leon, A. S. (2012). “Improving the Computational Efficiency of the Hydraulic Performance Graphs for Unsteady Flow Routing in Complex River Networks.” 2012 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 18, 2012.
Gibson, N. L., Leon, A. S., and Gifford-Miears, C. H. (2012). “Toward Reduction of Uncertainty in Complex Multi-Reservoir River Systems.” SIAM (Society for Industrial and Applied Mathematics) Conference on Uncertainty Quantification, Raleigh, North Carolina, April 2-5, 2012.
Leon, A. S., Kanashiro, E. A., Valverde, R., Gifford-Miears, C. H., Gichamo, T. Z., Gomez L., and Rask, J. (2012) “A Computationally Efficient and Robust Approach for Multi-objective Operation of Multi-reservoir systems Subjected to Multiple Constraints.” Reservoir System Modeling Technologies Conference, Bonneville Power Administration, February 21-22, 2012, Portland, Oregon.
Gibson, N. L., Gichamo, T. Z., Valverde, R., Gifford-Miears, C. H., and Leon, A. S. (2012) “Towards reduction of uncertainty in the operation of reservoir systems.” Reservoir System Modeling Technologies Conference, Bonneville Power Administration, February 21-22, 2012, Portland, Oregon.
Leon, A. S., and Gichamo, T. Z. (2011). “A novel physically-based framework for the intelligent control of river flooding.” Oregon Water Conference, Corvallis, Oregon, 2011.
Leon, A. S. (2006) “Towards modeling for real-time control of combined-sewer-overflow systems: Application to the Calumet TARP System in Chicago, Illinois.”  Proc., Illinois Water Conference, October 4-5, 2006. Edited by Jennifer Fackler, Illinois Water Resources Center.
Leon, A. S. (2006). “Efficient numerical modeling of one and two-phase transient flows (In Spanish).” Proc., I International Congress of Hydraulics, Hydrology and Environment. Organized by Instituto de la Construcción y Gerencia, Lima, Peru.
Leon, A. S. (2006). “New numerical model for the simultaneous simulation of unsteady free surface and pressurized flows. (In Spanish).” Proc., I International Congress of Hydraulics, Hydrology and Environment. Organized by Instituto de la Construcción y Gerencia, Lima, Peru.
Leon, A. S. (2004). “Special topics in unsteady flows and its applications to Hydraulic Engineering (Key Note speaker - in Spanish).” Proc., I Conference in Hydraulics of Rivers and Channels, Lima, Peru.
Leon, A. S. (2003). “One-dimensional modeling of the intrusion of contaminants for conservative substances in non-permanent and non-uniform flows (In Spanish).” Proc., XIV National congress of Civil Eng., Iquitos, Peru.
Leon, A. S. (2002). “Alternative of hydraulic design for intakes in steep rivers and large transport of boulders. (In Spanish).” Proc., Instituto de la Construcción y Gerencia, Lima, Peru.
Leon, A. S. (1999). “Local scour around cylindrical piers in non-cohesive beds (In Spanish).” Proc., XII National congress of Civil Eng., Huánuco, Peru.

Reports / Manuals: 

Leon, A. S., and other eight authors (2016). “Framework for Quantification of Risk and Valuation of Flexibility in the FCRPS – Stage gate 2”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S. (2016). “Prediction and quantification of CSOs in combined sewer systems under extreme storm events: Extreme events, Flow dynamics, Reduction of CSOs”, Progress Report Year 4 prepared for the U.S. Environmental Protection Agency.

Leon, A. S., and other eight authors (2016). “Framework for Quantification of Risk and Valuation of Flexibility in the FCRPS – Stage gate 1”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and other nine authors (2015). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty – Final Report, Software and Other Deliverables”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and Choi Y. (2015). “Prediction and quantification of CSOs in combined sewer systems under extreme storm events: Extreme events, Flow dynamics, Reduction of CSOs”, Progress Report Year 3 prepared for the U.S. Environmental Protection Agency (primary author).

Babbar-Sebens M. and Leon, A. S. (2015). “Improving sustainability of urban streets via rain gardens – How effective are these practices in the Pacific Northwest?”, Final Project Report prepared for the Pacific Northwest Transportation Consortium (PacTrans), USDOT University Transportation Center for Federal Region 10, University of Washington.

Leon, A. S., and other nine authors (2015). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 6”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and other nine authors (2014). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 5”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and Choi Y. (2014). “Prediction and quantification of CSOs in combined sewer systems under extreme storm events: Extreme events, Flow dynamics, Reduction of CSOs”, Progress Report Year 2 prepared for the U.S. Environmental Protection Agency (primary author).

Leon, A. S., and other nine authors (2014). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 4”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and other nine authors (2013). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 3”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and Choi Y. (2013). “Prediction and quantification of CSOs in combined sewer systems under extreme storm events: Extreme events, Flow dynamics, Reduction of CSOs”, Progress Report Year 1 prepared for the U.S. Environmental Protection Agency (primary author).

Leon, A. S., and other nine authors (2013). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 2”, Report prepared for the Bonneville Power Administration, US Department of Energy (primary author).

Leon, A. S., and Oberg, N. (2013). “User's manual for Illinois Transient Model-two equation model v. 1.3. A Model for the Analysis of Transient Free surface, Pressurized and Mixed flows in Storm-sewer Systems”, Oregon State University, Corvallis.

Leon, A. S., and other nine authors (2012). “Development of a state-of-the-art computational framework and platform for the optimal control of multi-reservoir systems under uncertainty - Stage gate 1”, Report prepared for the Bonneville Power Administration, US Department of Energy.

Leon, A. S., and Oberg, N. (2010). “User's manual for Illinois Transient Model-two equation model. A Model for the Analysis of Transient Free surface, Pressurized and Mixed flows in Storm-sewer Systems. Version 1.2”.

Leon, A. S., and Oberg, N. (2009). “Illinois Transient Model Programmer's Manual”, University of Illinois at Urbana-Champaign.

Leon, A. S., Oberg, N., Choi, N.J., Schmidt, A., and García, M.H., 2009. "Transient Analysis of the Calumet TARP System" Report prepared for the Metropolitan Water Reclamation District of Greater Chicago. University of Illinois at Urbana-Champaign, Civil Engineering Studies, Hydraulic Engineering Series.

Cataño-Lopera  Y. A., Oberg N., Choi N. J., Schmidt, A. R., Leon, A. S., and Garcia, M. H. (2009). “Hydraulic Conveyance Analysis of the Tarp Calumet System." Report prepared for the Metropolitan Water Reclamation District of Greater Chicago. University of Illinois at Urbana-Champaign, Civil Engineering Studies, Hydraulic Engineering Series.

Leon, A. S., and Oberg, N. (2009). “User's manual for Illinois Transient Model-two equation model v. 1.1. A Model for the Analysis of Transient Free surface, Pressurized and Mixed flows in Storm-sewer Systems”, University of Illinois at Urbana-Champaign.

Oberg, N., Schmidt, A., Leon, A. S., Waratuke, A., and García, M.H., 2008. "Illinois Hydraulic Conveyance Analysis Program: ICAP." Report prepared for the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC). University of Illinois at Urbana-Champaign, Civil Engineering Studies, Hydraulic Engineering Series No. 81, ISSN: 0442-1744.

Leon, A. S., Christensen, D. R., Schmidt, A. R., and García, M. H. (2007). “Illinois Transient Model (One-equation model) user's manual. A Model for the Analysis of Unsteady Free surface, Pressurized and Mixed flows in Storm-sewer Systems”, University of Illinois at Urbana-Champaign.

García, M. H., Leon, A. S., Ancalle, C. (2007) “Sedimentation analysis of Valenciano reservoir, Juncos, Puerto Rico”, Prepared by CA Engineering for CSA Group, San Juan, Puerto Rico.

García, M. H., Leon, A. S., Ancalle, C. (2007) “Safe yield Analysis of Valenciano reservoir, Juncos, Puerto Rico”, Prepared by CA Engineering for CSA Group, San Juan, Puerto Rico.

Leon, A. S., Schmidt, A. R., Ghidaoui, M. S. and García, M. H. (2006) “Review of sewer surcharging phenomena and models." University of Illinois at Urbana-Champaign. Civil Engineering Studies, Hydraulic Engineering Series No. 78

García, M. H., Niño, Y., Abad, J. D., Cantero, M., Leon, A. S., Manzini, S., Sequeiros, O. (2003) “Sedimentation management in combined sewer overflow storage reservoirs using water jets." University of Illinois at Urbana-Champaign. Report to Metropolitan Water Reclamation District of Greater Chicago.

POSTERS

  • Chen, D., Leon, A. S., Hosseini, P. (2016). “A warm-start Strategy to Improve the Performance of an Evolutionary Algorithm for Optimizing Operation of Multi-reservoirs.” Poster presented in the ASCE-EWRI World Environmental & Water Resource Congress, West Palm Beach, FL, May 22-26, 2016.
  • Leon, A. S. and Elayeb, I., (2016). “An Experimental Study on Geysers with Unsaturated Air and Near-saturation CO2. Implications on the Design of Stormwater and Combined Sewer Systems.” Poster presented in the ASCE-EWRI World Environmental & Water Resource Congress, West Palm Beach, FL, May 22-26, 2016.
  • Elayeb, I., and Leon, A. S. (2016). “An experimental study on air- and CO2 based geyser flows” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, April 18, 2016.
  • Hosseini, P., Chen D., Leon, A. S. and Gibson N. (2016). “Optimization of reservoir operation considering uncertain decision variables.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, April 18, 2016.
  • Choi, Y., Leon, A. S., and Apte, S. (2016). “A one-dimensional numerical model for predicting pressure and velocity oscillations due to buoyancy of a compressed air-pocket in a vertical shaft” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, April 18, 2016.
  • Elayeb, I., and Leon, A. S. (2016). “An experimental study of geyser occurrence in combined sewer systems” Poster presented in the Oregon State COE Graduate Student Research Expo, Portland, March 01, 2016.
  • Choi, Y., Leon, A. S., and Apte, S. (2016). “A one-dimensional numerical model for predicting pressure and velocity oscillations due to buoyancy of a compressed air-pocket in a vertical shaft.” Poster presented in the Oregon State COE Graduate Student Research Expo, Portland, March 01, 2016.
  • Hosseini, P., Chen, D. Leon, A. S., Gibson, N. (2016). “Robust Optimization of Reservoir Operation Considering Uncertainty of Inflows and Flexible Decision Variables.” Poster presented in the Oregon State COE Graduate Student Research Expo, Portland, March 01, 2016.
  • Alnahit, A. O., and Leon, A. S. (2015). “A Remotely Controlled Siphon System for Dynamic Water Storage Management.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 14-18, 2015.
  • Choi, Y., Leon, A. S., and Apte, S. (2015). “A one-dimensional numerical model for predicting pressure and velocity oscillations of a compressed air-pocket in a vertical shaft.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 14-18, 2015.
  • Hosseini, P., Chen, D., Leon, A. S. and Gibson, N. (2015). “Flexible Decision Variables in Short-term Operation of Reservoirs Using Dimension Reduction Approach.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 14-18, 2015.
  • Elayeb, I. S., Leon, A. S., Choi, Y., and Alnahit, A. O. (2015). “An experimental study of geyser-like flows induced by a pressurized air pocket.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 14-18, 2015.
  • Chen, D., Leon, A. S., Hosseini, P., and Gibson, N. (2015). “Robust multi-objective optimization for short-term reservoir operation under inflow uncertainty.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 14-18, 2015.
  • Hosseini, P., and Leon, A. S. (2015). “Multi-Objective Optimization of Reservoir Operation Considering Flexibility in Decision Variables.” Poster presented in the OSU College of Engineering Research Engineering Expo, Portland, March 04, 2015. Parnian received the Runner-up Award (School of Civil and Construction Engineering).
  • Choi, Y., Leon, A. S., and Apte, S. (2014). “Predicting Air-Water Geysers and their Implications on Reducing Combined Sewer Overflows.” Poster presented in the American Geophysical Union Fall Meeting, San Francisco, California, December 15-19, 2014.
  • Livingston, G. E., Leon, A. S. and Babbar-Sebens, M. (2014). “Oregon BEST Lab: OSU-Benton County, Green Stormwater Infrastructure Research Facility.” Poster presented in the Oregon BEST FEST, Portland, Oregon, September 15th –16th, 2014.
  • Livingston, G. E., Babbar-Sebens, M. and Leon, A. S. (2014). “Green Infrastructure for Stormwater Treatment.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 12, 2014.
  • Choi, Y., Leon, A. S., and Apte, S. (2014). “Three-Dimensional Numerical Study of the Turbulent Flow Structures Present in Air-Water Geyser Flows.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 12, 2014.
  • Hosseini, P., and Leon, A. S. (2014). “A Multi-Objective Optimization for the Operation of Multi-Reservoir Systems under Uncertainty.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 12, 2014.
  • Gomez, L., Lee, H. W, and Leon, A. S. (2014). “A Domain Decomposition strategy for Unsteady Flow Routing in River Systems.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 12, 2014.
  • Hosseini, P., and Leon, A. S. (2014). “Effects of small tidal-type waves on average flow discharge in mild-sloped rivers and canals.” Poster presented in the OSU College of Engineering Research Engineering Expo, Portland, OR, 2014.
  • Hosseini, P., Leon, A. S. and Chen D. (2014). “A Framework for Optimizing Short-time Operation of Multiple Reservoirs with Multi-objectives Under Uncertainty.” Poster presented in the OSU College of Engineering Research Engineering Expo, Portland, OR, 2014.
  • Leon, A. S., Gifford-Miears C. and Gomez L. (2013). “Unsteady flow routing using Performance Graphs based on two-dimensional hydrodynamic simulations” Poster presented in the ASCE-EWRI World Environmental & Water Resource Congress, Cincinnati OH, May 19-22, 2013
  • Leon, A. S. and Choi Y. (2013). “A new numerical model that preserves “lake at rest” conditions in open-channel and surcharged flows in steep-slope closed conduit systems” Poster presented in the ASCE-EWRI World Environmental & Water Resource Congress, Cincinnati OH, May 19-22, 2013.
  • Gomez, L., Lee, H. W, and Leon, A. S. (2013). “A real options-based framework to evaluate investments in river flood control under uncertainty.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 13, 2013.
  • Gomez, L., and Leon, A. S. (2013). “The OSU Rivers Model and its Comparison with the Unsteady HEC-RAS Model.” Poster presented in the Water Research Symposium, Oregon State University, Corvallis, Oregon, May 13, 2013.
  • Leon, A. S., Gichamo, T. Z., Valverde, R., and Rask, J. (2012). “Hydraulic performance graph-based model for unsteady flow simulations in topologically complex river networks.” Poster presented in the XIX International Conference on Computational Methods in Water Resources (CMWR), University of Illinois at Urbana-Champaign, Urbana, Illinois, June 17-21, 2012.
  • Choi, Y., and Leon, A. S. (2012). “Design, Analysis and Implementation of Multipurpose River Research Facility at O.H. Hinsdale Wave Research Laboratory.” Poster presented in the 2012 Water Research Symposium, Oregon State University, Corvallis, Oregon, May 18, 2012.
  • Bernedo C., Salas, J. and Leon, A. S. (2012). “Considering climate uncertainties to determine hydrologic design criteria – Does traditional Rainfall-Frequency Analysis works?” Poster presented in the ASCE-EWRI World Environmental & Water Resource Congress, Albuquerque, NM, May 20-24, 2012.

THESIS

  • Leon A. S. (2006) “Improved Modeling of Unsteady Free Surface, Pressurized and Mixed Flows in Storm-sewer Systems.” Ph.D. Thesis, University of Illinois at Urbana-Champaign.
  • Leon, A. S. (2000) “Local scour around cylindrical piers in non-cohesive beds (In Spanish).” M.S Thesis, Universidad Nacional de Ingeniería. Advisor: Dr. Francisco Coronado (Ph.D., Massachusetts Institute of Technology (MIT)).
  • Leon, A. S. (1998) “The hydraulic design of a bottom rack type intake in a supercritical regime and software applications (In Spanish).” C.E Thesis, Universidad Nacional San Cristobal de Huamanga. Advisors: Prof. Erasmo Matos, Dr. Francisco Coronado (MIT).

SOFTWARE AND CODES
I have developed over 10 computational models, which are available at: http://www2.egr.uh.edu/~aleon3/Codes.html. The main models that I have developed include:

  • Illinois Transient Model (2004-Present): The Illinois Transient Model (ITM) is an open source multipurpose Finite Volume (FV) model to analyze transient flows in closed-conduit systems ranging from dry-bed flows to gravity flows, to partly gravity-partly surcharged flows (mixed flows) to fully pressurized flows (waterhammer flows). In the ITM model, the free surface region is modeled using the 1D Saint-Venant equations and the pressurized region is modeled using the 1D compressible waterhammer equations.  The current version of the ITM model (V. 1.5 May, 2015) has features that make this model superior with respect to other models for analyzing transient flows in complex closed-conduit systems. The ITM model was used for the analysis of combined sewer systems in the United States in cities like Chicago, Cleveland, San Francisco, and Dallas and has been used in countries such as Switzerland, China, New Zealand and Mexico.
    Link: http://www2.egr.uh.edu/~aleon3/ITM.htm  
  • Steady-Pipe Networks (2014-Present): Code for analyzing steady flows in pipe networks. This Matlab code is intended for analyzing steady flows in complex pipe networks. This code can handle reservoirs, pumps and user-defined flows at nodes. The input data is entered in Excel and the equations are solved in Matlab.
    Link: http://www2.egr.uh.edu/~aleon3/Pipe_Network.html
  • OSU-Hydro turbines (2013-Present): Matlab code for determining optimal flow discharge and optimal penstock diameter when designing impulse and reaction turbines for hydropower systems. This code is based on the paper “A dimensionless analysis for determining optimal discharge and penstock diameter in impulse and reaction water turbines” by Leon A. and Zhu L. (2013). 
    Link: http://www2.egr.uh.edu/~aleon3/hydropower_calc.html  
  • Annel2 (2002-Present): Matlab code for computing water surface profiles in circular and trapezoidal channels in series.
    Link: http://www2.egr.uh.edu/~aleon3/Annel2.html  
  • Illinois Conveyance Analysis Program (ICAP) (2012-Present). ICAP uses hydraulic performance graphs to describe the conveyance of a system, identify bottlenecks for varying conditions, conserve mass by tracking outflow and overflows under stepwise steady flow conditions.
    Authors: Oberg, Nils; Schmidt, Arthur R.; Landry, Blake J.; Leon, Arturo S.; Mier, Jose M.; Garcia, Marcelo H.
    Link: https://www.ideals.illinois.edu/handle/2142/89288  
  • Dual Drainage Model (DDM) (2008-Present): Code for modeling overland flows, street flows, Curb-and-grate inlet flows and pipe flows For the street and pipe flows a finite volume-shock-capturing scheme was used. Collaborator: Prof. Leonardo Nania (University of Granada, Spain).
  • OSU-OUU (2012-Present): Code for real-time operation of multi-objective and multi-reservoir systems that accounts for uncertainty and flexibility.  This model couples hybrid optimization algorithms with a robust and numerically efficient hydraulic routing approach (OSU-Rivers). This model allows for scalable parallelization and has an integrated platform with a user-friendly graphical interface.
  • OSU-Rivers (2011-Present): Code for unsteady flow routing of complex rivers systems based on the performance graphs approach.  This model is named OSU-Rivers. This model is robust and numerically efficient and is recommended for simulation of regulated river systems in real-time conditions.
  • Code for modeling the development, propagation, coalescence and release of air pockets in pipelines (2007-2008, Finite volume method & shock-capturing schemes)
  • Code for the solution of the 2D shallow water equations (2004, Finite volume method & shock-capturing schemes)
  • Code for modeling two-phase waterhammer flows in complex networks (2004, Finite volume method & shock-capturing schemes)
  • Code for modeling unsteady free surface flows in complex networks (2004, Finite volume method & shock-capturing schemes)
  • Code for the 1D modeling of sediment transport in rivers (2004, Finite differences)
  • Code for modeling one-phase waterhammer flows in complex networks (2003, Finite volume method & shock-capturing schemes)
  • Code for the 1D modeling of transport of contaminants in channels in series (2003, Finite differences)
  • Code analyzing the hydraulic conveyance of tunnel networks (2003)
  • Code for the design of intakes in supercritical flows (1998)
  • Code for the design of channels and energy dissipators (1997).

News: 

Arturo was quoted in the Wired Magazine for discussing the hydraulics of the World’s Biggest Indoor Waterfall in an Airport (https://www.wired.com/2016/09/fit-worlds-biggest-indoor-waterfall-airport/)

Our project was featured as a success PacTrans story: "PacTrans Technology Transfer Success Story 2015 #4: How Green is your Green Infrastructure? A Field-Scale Testing Facility to Investigate Efficiency of Roadside Stormwater Technologies". Investigators: Meghna Babbar-Sebens (OSU) and Arturo Leon (OSU). The complete article can be found at http://depts.washington.edu/pactrans/pactrans-technology-transfer-success-story-2015-4-how-green-is-your-green-infrastructure-a-field-scale-testing-facility-to-investigate-efficiency-of-roadside-stormwater-technologies/#

Arturo was interviewed by The American Society of Mechanical Engineers (ASME) about top jobs in Hydraulic Engineering, November, 2014. https://www.asme.org/engineering-topics/articles/workforce-development/4-leading-job-areas-hydraulics

Two new research labs were inaugurated at Oregon State University: The Multipurpose Hydraulics Research Facility and the Green Stormwater Infrastructure Research Facility, October, 2014. Arturo is the director of the Multipurpose Hydraulics Research Facility and co-director (with Dr. Meghna Babbar-Sebens) of the Green Stormwater Infrastructure Research Facility.
http://www.bentonswcd.org/stormwater-research-facility/
http://oregonbest.org/news-events/news/item/news/News/action/detail/story/two-new-oregon-best-labs-focus-on-water/

Arturo was inducted as Diplomate, Water Resources Engineer (D.WRE) of the American Academy of Water Resources Engineers (AAWRE), June 2, 2014. http://blogs.oregonstate.edu/oregonstatecce/2014/05/08/professor-arturo-leon-receives-honor-aawre/
http://water.oregonstate.edu/h2osu-may-12-2014

Arturo was awarded an EPA Early Career Award, April, 2012. http://blogs.oregonstate.edu/engineering/2012/04/10/four-engineering-professors-earn-prestigious-awards/. Also appeared in IWW-OSU.

Arturo’s research was featured in the OSU College of Engineering site, December, 2011 http://engineering.oregonstate.edu/content/novel-approach-flood-control

Student-built model simulates water flow in Graf Hall, Daily Barometer newspaper, October 25, 2011. http://www.dailybarometer.com/student-built-model-stimulates-water-flow-in-graf-hall/article_30620311-f4b9-5ddb-a6d9-d48aaaef8029.html

Arturo Leon recognized as one of the most successful professionals of all times of the Universidad Nacional San Cristobal de Huamanga, Universidad Nacional San Cristobal de Huamanga, July 06, 2009. http://www.modestomontoya.org/reportescienciaperu/200906julioreportescienciaperu/JCRomanicondecoradoUNSCH.html