Environmental Hydrology and Hydraulic Engineering

Arthur R. Schmidt

Arthur R.
Schmidt

Research Assistant Professor

2535a Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 333-4934
Fax: 
(217) 333-0687

Art Schmidt received a B.S. in Civil Engineering from the University of Illinois in 1983 and his M.S. in Civil Engineering from University of Illinois in 1984. He worked as a Hydrologist for the Illinois District of the United States Geological Survey from 1983 to 1994. From 1994 to 1999 he was the Director of Technical Operations for HydroScience, Ltd., Inc., a consulting-engineering firm headquartered in Seffner Florida. From 1998 through 2000 he was the "Flow-Measurement Expert" for the 4th Lake Michigan Diversion Accounting Technical Committee. He returned to the University of Illinois in July 1999 and completed his Ph.D. degree in Environmental Hydrology and Hydraulic Engineering (EHHE) in 2002. His, titled Analysis of Stage-Discharge Relations for Open-Channel Flows and Their Associated Uncertainties, was selected as one of two first-place finishers for the University Council on Water Resources Ph.D. Dissertation Award in the field of Natural Science and Engineering.

Dr. Schmidt has worked in the civil engineering profession since 1975--beginning part-time as part of a land-surveying crew--with a continually-increasing level of professional responsibility. His university-level course work comprises a comprehensive background in environmental hydraulics and hydrology and related topics including numerical methods, operations research, statistics, and water quality. This course work was all completed at the University of Illinois. In addition, Dr. Schmidt has completed many other courses offered through the U.S. Geological Survey, the U.S. Environmental Protection Agency, the National Weather Service, and university-extension programs. Courses relevant to his technical background include courses on four dynamic (unsteady-flow) hydraulic models, one hydrologic model, three solute transport and water-quality models, two courses on water-quality processes, a course on probability and statistics for hydrologic data, and several courses on technical writing and editing. Dr. Schmidt's general research interest is in the study of surface-water hydraulics and hydrology, especially focusing on methods to provide improved measurement and quantitative description of flows. Dr. Schmidt's current research involves a critical review of stage-discharge relations from a fluid-mechanics perspective. This research is expected to provide a means to develop theoretically based stage-discharge ratings for open-channels, significantly reducing the number of flow measurements needed to develop these ratings. In addition to his research, Dr. Schmidt taught CEE255, Introduction to HydroSystems Engineering, in the Fall 2001 semester and CEE 356, Hydraulics of Surface Drainage in the Spring, 2002 semester. Dr. Schmidt is s registered Professional Engineer in Florida and Illinois and is a member of the American Society of Civil Engineers.

Research Overview: 

Dr. Schmidt’s general research interest is the study of surface-water hydraulics and hydrology, especially focusing on methods to provide improved measurement and quantitative description of flows and also on reliability analysis applications in water-resources and environmental engineering. His dissertation research, titled “Analysis of Stage-Discharge Relations for Open-Channel Flows and their Associated Uncertainties,” presented a theoretical basis for developing stage-discharge ratings theoretically, rather than empirically and also applied reliability-analysis techniques to calculate the uncertainties in discharges determined from ratings.

Robert R. Holmes, Jr. Ph.D., P.E., D.WRE

Robert R.
Holmes, Jr. Ph.D., P.E., D.WRE

Adjunct Professor
Hydrologist, U.S. Geological Survey

U.S. Geological Survey
1400 Independence Road
Rolla, MO 65401

Phone: 
(573) 308-3581

Robert Holmes is an Adjunct Assistant Professor in Civil and Environmental Engineering and also is the Director of the U.S. Geological Survey Illinois Water Science Center (USGS-IWSC). In his capacity as Director of the USGS-IWSC, Dr. Holmes manages and directs all USGS Water Resources field operations and research in Illinois. Before becoming Director in 1999, Dr. Holmes served in various positions in Missouri and Illinois with USGS including: staff hydrologist, Surface-Water Specialist, and Chief of the Hydrologic Data and Analysis Section.

Dr. Holmes teaches undergraduate and graduate courses in Water Resources Engineering and Hydraulics. In addition, he teaches short courses in sediment transport, open-channel hydraulics, water availability, and field data collection techniques.

Dr. Holmes has BS and MS degrees in Civil Engineering from the University of Missouri-Rolla, and a PhD in Civil and Environmental Engineering from the University of Illinois at Urbana-Champaign. He is a licensed professional engineer in Illinois and Missouri and holds memberships in Sigma Xi Research Society, the American Society of Civil Engineers (ASCE), the American Geophysical Union, the International Hydrological Science Association, and the Illinois Association of Floodplain and Stormwater Managers.

Dr. Holmes has and is serving on numerous science advisory committees including the Illinois River Coordinating Council, Salt Fork Watershed Technical Advisory Group, Illinois River Science Advisory Council, Illinois State Water Plan Task Force, Illinois Drought Response Task Force, Corps of Engineers Illinois River Basin Restoration Study Steering Committee, and the USGS Representative to National Research Council Workshop on Stream Restoration.

Dr. Holmes has served as President of the Mid-Missouri Section of ASCE and Water Master for the Champaign-Urbana Hydraulic Engineering Luncheon Series and has received the Department of the Interior�s Superior Service Award.

Research Overview: 

Dr. Holmes has research interests in the areas of geomorphology, surface-water hydrologic processes, river hydraulics, sediment transport, and stream restoration. He has authored or co-authored numerous papers and reports on these topics.

J. Wayland Eheart

J. Wayland
Eheart

Professor Emeritus

3217 Newmark Civil Engineering Laboratory

205 N. Mathews Ave. Urbana, IL 61801

Phone: 
(217) 333-6962
Fax: 
(217) 333-6968

J. Wayland Eheart holds a B.S. in chemical engineering (University of Maryland 1966), M.S. in chemical engineering (North Carolina State University 1968), and Ph.D. in civil and environmental engineering (University of Wisconsin 1975). He has been on the faculty of the Department of Civil and Environmental Engineering since 1978.

Dr. Eheart has taught the following courses in Civil and Environmental Engineering: CEE 241, 292, 341, 339, 439, and 441. He is currently working on a book for the 339 and 439 courses tentatively entitled Environmental Systems Analysis.

Dr. Eheart is a member of the American Geophysical Union, the American Society of Civil Engineers, and Phi Kappa Phi. He is a member of the Water Resources Standards Committee of ASCE, which has produced the ASCE Model Water Codes and is the editor of a recent ASCE publication from the same committee entitled: Riparian Water Regulations: Guidelines for Withdrawal Limitations and Permit Trading.

Research Overview: 

Dr. Eheart's research focuses on the use of mathematical models and engineering principles in the development of environmental policy. His research has been applied to problems of water and air pollution control, water quantity maintenance, groundwater remediation and monitoring, as well as assessment of and adaptation to global climate change.

Albert J. Valocchi

Albert J.
Valocchi

Professor and Associate Head

"Our graduate students will address society's challenges—problems we can't even imagine today."

1110 Newmark Civil Engineering Laboratory

205 N. Mathews Ave. Urbana, IL 61801

Phone: 
(217) 333-3176
Fax: 
(217) 333-0687

Albert J. Valocchi received his B.S. in Environmental Systems Engineering from Cornell University in 1975 and did his graduate studies at Stanford University in the Department of Civil Engineering, receiving his M.S. in 1976 and Ph.D. in 1981. He has been on the faculty of the department of Civil and Environmental Engineering at the University of Illinois since 1981, and currently holds the rank of Professor.

Dr. Valocchi teaches undergraduate and graduate courses in water resources engineering, groundwater hydrology and contaminant transport, groundwater modeling and numerical methods, and stochastic analysis of porous media transport.

Dr. Valocchi is a member of the American Society of Civil Engineers, the American Geophysical Union, the Association of Environmental Engineering and Science Professors, the Society for Industrial and Applied Mathematics, the American Society for Engineering Education, and Sigma Xi. He serves as Associate Editor for the Journal of Contaminant Hydrology, the Journal of Hydrologic Engineering (ASCE), Advances in Water Resources, and the Vadose Zone Journal. He has also served as a member of the National Research Council Committee on Environmental Remediation at Naval Facilities.

Dr. Valocchi has received several awards in recognition of his research and teaching accomplishments. He was a Shell Faculty Career Fellow from 1984 to 1987, and he has been awarded fellowships to lecture and conduct research from NATO and the Danish Research Academy. In 2002 he received the Collins Award for Innovative Teaching from the University of Illinois College of Engineering.

Research Overview: 

Dr. Valocchi’s research focuses upon mathematical modeling of pollutant fate and transport in porous media, with applications to groundwater contamination and remediation. He specializes in the development and application of models that couple physical, geochemical, and microbiological processes over a wide range of spatial scales ranging from the pore scale (micrometers) to the field scale (kilometers).

Murugesu Sivapalan

Murugesu
Sivapalan

Professor of Geography and Civil and Environmental Engineering

"When change is happening very rapidly, the past is no longer a guide to the future."

2524 Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 333-2675
Fax: 
(217) 244-1675

Murugesu Sivapalan holds a B.S. in Civil Engineering (University of Ceylon 1975), M.Eng in Water Resources Engineering (Asian Institute of Technology Thailand 1977), and M.A. (1983) and Ph.D (1986) in Civil Engineering, with a major in hydrology, from Princeton University.

Between 1978 and 1981, Dr Sivapalan worked as a consulting civil engineer in Nigeria. During the period 1986-1988 he served as a Research Associate at Princeton University. He spent the next 17 years at the University of Western Australia, Perth, joining as a Lecturer and being promoted to full Professor in 1999. Dr Sivapalan has also served as Visiting Professor at the Technical University of Vienna, Austria, and the Technical University of Delft, The Netherlands. He joined the University of Illinois in 2005.

Dr. Sivapalan has taught undergraduate and graduate courses in watershed hydrology, engineering hydrology, stochastic hydrology and water resources engineering. 

He is a member of the American Geophysical Union’s Surface Water Committee and the European Geophysical Society’s Catchment Hydrology Committee. Dr Sivapalan was the founding chair of the International Association of Hydrological Sciences’ (IAHS) Decade on Predictions in Ungauged Basins (PUB) initiative. He is a member of the editorial boards of several international journals and is the Executive Editor of the European Geophysical Union’s Hydrology and Earth System Sciences (HESS) journal.

Dr Sivapalan has been elected a Fellow of the American Geophysical Union, a Fellow of the Australian Academy of Technological Sciences and Engineering, a Fellow of the Modeling and Simulation Society of Australia and New Zealand, and a Life Member of the International Water Academy. He is the recipient of the European Geophysical Union’s John Dalton Medal and the Biennial Medal (for Natural Systems) of the Modeling and Simulation Society of Australia and New Zealand. He has been awarded the Centenary Medal by the Australian Government “for service to Australian Society in Hydrology and Environmental Engineering.”

Research Overview: 

Dr. Sivapalan's research focuses on making predictions in ungaged basins. A basic aim of his research is to understand observed space-time variabilities of runoff processes at all scales, including their extremes, and to interpret these in terms of the underlying climate-soil-vegetation-topography interactions, including human impacts. A further aim is to investigate the interactions between runoff processes, and chemical and biological processes, and to develop new process-based models capable of making predictions of both water quantity and quality in ungaged basins, subject to natural and human-induced changes to climate and the landscape.

Gary Parker

Gary
Parker

Professor

 "Basic engineering science and application to real-world problems stand together on equal footing in our department."

2527c Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 244-5159
Fax: 
(217) 333-0687

Click here for Gary Parker’s Morphodynamics Page 

Gary Parker joined the faculty of the Environmental Hydrology and Hydraulic Engineering group in the summer of 2005. He holds a 75 percent appointment in the Depart­ment of Civil and Environmental Engineering and a 25 per­cent appointment in the Department of Geology, where he is the W.H. Johnson Professor of Geology.

Professor Parker received a B.S. from the Department of Mechanics and Materials Science of Johns Hopkins University (1971) and a Ph.D. from the Department of Civil Engineering of the Uni­versity of Minnesota (1974). Before coming to the University of Illinois, he was an Institute of Technology Distinguished Professor in the Department of Civil Engineering at the University of Minne­sota. During the period 1995-1999, he also served as Director of the St. Anthony Falls Laboratory, a water resources/fluid mechanics laboratory in the same department.

Prof. Parker was elected a Fellow of the American Geophysi­cal Union in 2003, and received the G.K. Warren Award in Fluviatile Geomorphology in 2002. He has received the Schoemaker Award twice and the Ippen Award from the International Association of Hydraulic Research, and the Einstein Award, Hilgard Prize and Stevens Award from the American Society of Civil Engi­neers. In 1991 he also received the University of Minnesota In­stitute of Technology Outstand­ing Teacher Award.

In addi­tion to numerous journal articles, he has written an e-book, “1D Sediment Transport Morphodynamics with Applica­tions to Rivers and Turbidity Currents.”

Parker teaches undergraduate and graduate courses in flu­id mechanics, river engineering, sediment transport.

One of Prof. Parker's major research goals is to use the fundamental techniques of fluid mechanics and applied mathematics to treat interesting geomorphological problems. Related special research includes mechanics of river meandering; oceanic turbidity currents; sorting of mixed grain sediment by fluvial processes; bank erosion and protection using permeable dikes and vegetation; and reservoir sedimentation. Development of a mechanistic understanding of the processes involved with sediment transport in rivers and the ocean environment, and the morphologies they create, is of prime importance. River meander migration research has led to the development of computer models that predict channel shift and can therefore be used in the design of floodplain structures such as bridges, intakes, etc. In addition, research on depositional submarine fans has been found useful to oil companies as a means of helping locate oil deposits.

Research Overview: 

Prof. Parker's major research interests are river mechanics and morphology, sediment transport and two-phase solid fluid flow. His current efforts focus on downstream grainsize change in gravel rivers, migration of meander bends in sand bed rivers, formation of submarine alluvial fans due to sediment deposition from turbidity currents, evolution of channel cross-sectional shape, and nonlinear erodible bed mechanics.

Barbara S. Minsker

Barbara S.
Minsker

Professor
Nauman Faculty Scholar

"The systems perspective is critical to solving today's complex environmental and water resources engineering problems."

3230d Newmark Civil Engineering Laboratory

205 N. Mathews Ave. Urbana, IL 61801

Phone: 
(217) 265-5293
Fax: 
(217) 333-6968

Barbara S. Minsker holds a B.S. (Cornell University 1986) in operations research and industrial engineering, and Ph.D. (Cornell University 1995) in environmental systems engineering. From 1986 to 1990, she worked as an environmental policy analyst at ICF Incorporated and Wade Miller Associates in Washington, D.C. From 1995 to 1996, Dr. Minsker was a post-doctoral research associate at the University of Vermont's Research Center for Groundwater Remediation Design. She has been on the faculty at the department of Civil and Environmental Engineering since 1996 and is a Faculty Affiliate at the National Center for Supercomputing Applications.

Dr. Minsker has taught graduate and undergraduate courses in civil and environmental systems analysis, including introductory systems analysis for civil and environmental engineers, environmental systems analysis, environmental risk assessment and management, uncertainty in environmental and water resources decision making, and optimization methods for engineering design.

Dr. Minsker is a member of the American Geophysical Union (AGU), the American Society of Civil Engineers (ASCE) and the ASCE Environmental and Water Resources Institute (EWRI), the Association of Ground Water Scientists and Engineers, and the American Society for Engineering Education. She chairs the ASCE/EWRI Task Committee on Long-Term Groundwater Monitoring and is a member of the ASCE/EWRI Groundwater Management Committee, Environmental and Water Resource Systems Committee, and Evolutionary Computation Task Committee. She serves as associate editor for Water Resources Research and is a member of the AGU Groundwater Committee.

Dr. Minsker received the National Science Foundation Early Faculty Career (CAREER) Award in 1998 and the Army Young Investigator Award and the Presidential Early Career Award for Scientists and Engineers in 2000. In 2001, she was named a Center for Advanced Study Fellow. She has been an Arthur and Virginia Nauman Faculty Scholar since 2001.

Research Overview: 

Dr. Minsker has research interests in environmental systems analysis, investigating improved methods for modeling complex environmental systems so that informed management-level decisions can be made under conditions of uncertainty. Using machine learning approaches such as genetic algorithms, decision trees, support vector machines, and artificial neural networks, innovative and cost-effective solutions to complex environmental problems are being investigated. Recent applications include long-term groundwater monitoring and remediation design.

Praveen Kumar

Praveen
Kumar

Professor

"Our students will be the leaders in innovating sustainable solutions to society’s most significant challenges"

2527B Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 333-4688
Fax: 
(217) 333-0687

Praveen Kumar holds a B.Tech. (Indian Institute of Technology, Bombay, India 1987), M.S. (Iowa State University 1989), and Ph.D. (University of Minnesota 1993), all in civil engineering. He has been on the faculty of the department of Civil and Environmental Engineering at the University of Illinois since 1995. Prior to joining University of Illinois, he was a research scientist (January 1993 to July 1995) at the Universities Space Research Association (USRA) and Hydrologic Sciences Branch, NASA- Goddard Space Flight Center, Greenbelt, Maryland, USA.

Dr. Kumar has taught undergraduate and graduate courses in hydrosystems engineering, engineering modeling under uncertainty, surface water hydrology, hydroclimatology, stochastic hydrology, non-linear methods in hydrology, and hydroinformatics.

In 1993 Dr. Kumar received the Universities Space Research Association Award for Promise and Potential of a Young Scientist. In 1996 he received the NASA New Young Investigator Award. He was selected as the NCSA/UIUC Faculty Fellow for 2001-2002. In 2005 he received the Xerox Award for Faculty Research. He has also been recognized for teaching excellence by having been listed several times in the UIUC List of Teachers Rated as Excellent by their Students.

Dr. Kumar is currently the Editor-in-Chief for Water Resources Research, the major scientific journal in the field, published by American Geophysical Union (AGU).  Prior to this he was the Editor for Geophysical Research Letters (2007-2009) also published by AGU. In the past he has served as the Associate Editor (1998-2001) for Water Resources Research and for ASCE Journal of Hydrologic Engineering (2003-2004). He is a member of Precipitation Committee, and Remote Sensing Committee of the Hydrology Section of the American Geophysical Union and served as the Chair of Precipitation Committee during 1999-2001. He served for five years as a member of the Board of Directors for CUHASI,Consortium of Universities for the Advancement of Hydrologic Science which has 120 member universities. 

Research Overview: 

Dr. Kumar's research includes study of complexity in hydrologic processes including hydroclimatology, ecohydrology, geomorphology, and hydroinformatics. The overall goal of Dr. Kumar’s research is to improve our understanding of hydrologic processes over a range of space and time scales with particular emphasis on understanding and modeling multiple scale non-linear interactions among sub-processes.

Marcelo H. García

Marcelo H.
García

Professor
Chester & Helen Siess Endowed Professor in Civil & Environmental Engineering
Director, Ven Te Chow Hydrosystems Laboratory

2535b Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 244-4484
Fax: 
(217) 333-0687

Marcelo H. García holds a Ing. Dipl. (Universidad Nacional del Litoral, Argentina 1982) in water resources, M.S. (University of Minnesota 1985), and Ph.D. (University of Minnesota1989), both in civil engineering. He has been on the faculty of the department of Civil and Environmental Engineering since 1990, and has served as Director of the Ven Te Chow Hydrosystems Laboratory since 1997. Prior to joining UIUC, he was a Research Fellow for two years at St. Anthony Falls Hydraulic Laboratory, University of Minnesota. While in college, Dr. García participated in several model studies of the Parana River under the supervision of the Russian hydraulician, Dr. Gertrud Onipchenko.

Dr. García teaches an undergraduate course on Water Resources Engineering and Hydraulic Engineering. At the graduate level he teaches Environmental Hydrodynamics, Sediment Transport, River Mechanics, and Open-Channel Hydraulics. He has taught courses on Hydrodynamics of Sediment Transport at the University of Genoa, Italy (1993), the California Institute of Technology (1997) and the Ecole Polytechnique Federale de Laussane, Switzerland (1999). He has also taught short courses in Argentina, Chile, Hong Kong, Mexico and Spain. Recently, he taught a week-long course on “Sediment Transport During Extreme Hydrologic Events” at the Universidad de Castilla-La Mancha (Spain), and at the Universidad Nacional de Cordoba, Argentina.

The author of the book Hydrodinamica Ambiental (Environmental Hydrodynamics), García is widely published in scholarly journals and conference proceedings. He is Editor-in-Chief of the Sedimentation Engineering Manual 54 (Volume II) to be published by the American Society of Civil Engineers. He is the Chair of the Sedimentation Committee of the Environmental and Water Resources Institute (EWRI) and has served as Editor of the Journal of Hydraulic Research (IAHR) since 2001. He is a member of the American Society of Civil Engineers, International Association of Hydraulic Engineering and Research, International Water Resources Association, and American Geophysical Union.

Among his awards and honors, Dr. García has received the Excellence in Advising Award from the College of Engineering in 1997 and 2001. He was named an Arthur and Virginia Nauman Faculty Scholar in 1999 by the Department of Civil and Environmental Engineering, a University Scholar for 2000-2003 and the first Chester and Helen Siess Professor of Civil Engineering in 2001. He has consistently appeared in the Daily Illini’s “Incomplete List of Teachers Ranked as Excellent by Their Students.” He received the Karl Emil Hilgard Hydraulic Prize from ASCE for best publication in Journal of Hydraulic Engineering in 1996 and 1999, and the Walter L. Huber Research Prize for excellence in research from ASCE in 1998. In 2001, he received the 12th Arthur Thomas Ippen Award from the International Association of Hydraulic Engineering and Research (IAHR). In 2001, Professor García was named Honorary Professor by his Alma Mater, the Universidad Nacional del litoral, Santa Fé, Argentina.

Related to water problems in the State of Illinois, Dr. García developed physical models of the Boneyard Creek, Urbana, to help in the solution of flooding problems. With the help of another large-scale model, he redesigned lowhead dams on the Fox River to reduce the number of drowning accidents, and designed canoe chutes for the same dams in order to increase the safe recreational use of Illinois Streams. He has also worked with the U.S. Army Corps of Engineers to mitigate navigation problems caused by sedimentation and vegetation in the Upper Mississippi River Basin as well as with the design of a bubble-plume aeration system for McCook Reservoir in Chicago, to be built for stormwater management at a cost of 400 million dollars.

Research Overview: 

Dr. García is a leader in the field of river mechanics, sediment transport, sedimentation engineering and environmental hydraulics. He is best known for his research in sediment entrainment from riverbeds, flow and transport in vegetated channels, the mechanics of oceanic turbidity currents, and the dynamics of mudflows in mountain areas. His research has been funded at the Federal level by the National Science Foundation, the Office of Naval Research, the U.S. Environmental Protection Agency, the U.S. Department of Agriculture, and the U.S. Army Corps of Engineers. At the state level, Dr. García has received support from the Illinois Department of Natural Resources (IDNR), the Metropolitan Water Reclamation District of Greater Chicago (MWRDGC), the Illinois Water Resources Center, the Illinois-Indiana Sea Grant Program and the Sanitary District of Decatur, Illinois.
 

Ximing Cai

Ximing
Cai

Assistant Professor

"Water management problems are complex; they require interdisciplinary approaches."

2535c Hydrosystems Laboratory

301 N. Mathews Ave., Urbana, IL 61801

Phone: 
(217) 333-4935
Fax: 
(217) 333-0687

Ximing Cai received his B.S. in Water Resources Engineering from Tsinghua University, Beijing, in 1990, M.S. in Hydrology and Water Resources at Tsinghua University in 1994, and Ph.D. in Environmental and Water Resources Engineering in 1999. Before he joined the faculty of the Department of Civil and Environmental Engineering at the University of Illinois, he worked with the International Food Policy Research Institute (IFPRI) in Washington DC as a Postdoctoral Fellow (1999-2002); and as a joint Research Fellow at IFPRI and the International Water Management Institute (IWMI) in Colombo, Sri Lanka (2002-2003).

Dr. Cai teaches undergraduate and graduate courses in water resources engineering, surface water hydrology and application of geographic information systems, and river basin management.

Dr. Cai is a registered professional engineer (Maryland since 2002). He is a member of the American Society of Civil Engineers, American Geographic Union, and International Water Resources Association.

Research Overview: 

Dr. Cai’s research interests include large-scale system optimization, river basin planning and management, drought management, water resources economics and policy, geographic information system and spatial statistics, and international water resources development.

Syndicate content