1. Overview of WEAP

2. Water Evaluation and Planning System WEAP A generic, object-oriented, programmable, integrated water resources management modelling platform A generic, object-oriented, programmable, integrated water resources management modelling platform

3. WEAP Structure Node-link architecture connects water supplies to demands Node-link architecture connects water supplies to demands Each demand is assigned a priority and a preferences among available supplies Each demand is assigned a priority and a preferences among available supplies Determines order in which demands are met Determines order in which demands are met Determines order in which sources are used Determines order in which sources are used Constrained by link capacities Constrained by link capacities LP solution optimizes distribution of water at each time step LP solution optimizes distribution of water at each time step

4. Examples of Analyses Sectoral demand analyses Sectoral demand analyses Water conservation Water conservation Water rights and allocation priorities Water rights and allocation priorities Groundwater and streamflow simulations Groundwater and streamflow simulations Reservoir operations Reservoir operations Hydropower generation Hydropower generation Pollution tracking Pollution tracking Ecosystem requirements Ecosystem requirements

5. Extent of Use Visits to WEAP21 Website Oct 28, 2007 - May 14, 2008 32,227 visits from 2564 cities

6. WEAP Applications Water Systems Planning Water Systems Planning Small Reservoirs Project, Ghana/Brazil Small Reservoirs Project, Ghana/Brazil California Water Plan, California, USA California Water Plan, California, USA Guadiana River, Spain Guadiana River, Spain Transboundary Water Policy Transboundary Water Policy Okavango River, Angola/Namibia/Botswana Okavango River, Angola/Namibia/Botswana Lower Rio Grande, USA/Mexico Lower Rio Grande, USA/Mexico Mekong River, Thailand/Cambodia/Vietnam/Laos Mekong River, Thailand/Cambodia/Vietnam/Laos Jordan River, Syria/Israel/Jordan Jordan River, Syria/Israel/Jordan Climate Change Studies Climate Change Studies Sacramento and San Joaquin River Basins, California, USA Sacramento and San Joaquin River Basins, California, USA Massachusetts Water Resources Authority, Massachusetts, USA Massachusetts Water Resources Authority, Massachusetts, USA Yemen Second National Communication Yemen Second National Communication Mali Second National Communication Mali Second National Communication Ecological Flows Ecological Flows Connecticut Department of Environmental Protection, Connecticut, USA Connecticut Department of Environmental Protection, Connecticut, USA Town of Scituate, Massachusetts, USA Town of Scituate, Massachusetts, USA

8. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

9. WEAP Network Schematic Linking supply and demand Return flows to surface or ground water or treatment plants 5 Main Views Menu bar

10. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

11. Data View Data for the demand sites is displayed numerically and graphically

12. Reading from Files Read in timeseries data from text files or Access database

13. Building expressions Use the time series wizard or expression builder

14. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

15. Results View Results can be displayed in a number of formats and scales

16. Results Displayed on the Map

17. Scenario Explorer Favorite charts can be selected to give quick overviews

18. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

19. Notes View Select any part of the tree to enter notes about assumptions and references

20. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

21. Hydrology Read-from-file Method Historical or synthetic data Historical or synthetic data Import from ASCII files Import from ASCII filesRainfall-Runoff Lumped parameter Lumped parameter Semi-distributed Semi-distributed Sub-watershed specific Sub-watershed specific Climate input Climate input Simplified Water-Year Method Describe a series of water year types from very dry to very wet Enter the water year sequence

22. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Hydrology may be climate driven or from gage data Hydrology may be climate driven or from gage data Several internal modules to choose from ( eg Hydropower generation, Financial analysis, Water quality ) Several internal modules to choose from ( eg Hydropower generation, Financial analysis, Water quality ) Dynamically links to other models Dynamically links to other models

23. Hydropower Specify capacities, efficiencies, and other properties of power generation

24. Financial Analysis Specify variable and fixed costs and revenues

25. Water Quality Specify pollutant loadings

26. WEAP Capabilities Easy to use interface facilitates learning, data input, and scenario development Easy to use interface facilitates learning, data input, and scenario development Input can be from files or user specified functions Input can be from files or user specified functions Multiple scenarios can be run and displayed graphically at one time Multiple scenarios can be run and displayed graphically at one time Use of notes allows for internal documentation of scenarios Use of notes allows for internal documentation of scenarios Streamflows may be climate driven or from gage data Streamflows may be climate driven or from gage data Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Several internal modules to choose from (eg Hydropower generation, Financial analysis, Water quality) Dynamically links to other models Dynamically links to other models

27. Linking WEAP to Other Software Customized/Programmed links Customized/Programmed links Groundwater flow model Groundwater flow model MODFLOW MODFLOW Surface water quality model Surface water quality model Qual2K Qual2K User-defined links to dynamic-link libraries User-defined links to dynamic-link libraries California Department of Water Resources California Department of Water Resources Delta salinity model Delta salinity model East-Bay Municipal Utilities District East-Bay Municipal Utilities District Reservoir operations model Reservoir operations model Call WEAP using application programming interface (API) Call WEAP using application programming interface (API) Scenario analysis Scenario analysis CARS (RAND Corporation) CARS (RAND Corporation) Model calibration Model calibration PEST PEST Sensitivity analysis Sensitivity analysis VB script VB script

28. Linking WEAP to MODFLOW

30. WEAP Highlights Integrated water resources planning system Integrated water resources planning system GIS-based, graphical drag and drop interface GIS-based, graphical drag and drop interface Model-building tool – user-created variables and modeling equations Model-building tool – user-created variables and modeling equations Basic Methodology: physical simulation of demands and supplies Basic Methodology: physical simulation of demands and supplies Scenario management capabilities Scenario management capabilities Dynamic links to spreadsheets & other models Dynamic links to spreadsheets & other models