Overview of WEAP Water Evaluation and Planning

Overview of WEAP

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

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

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

Extent of Use Visits to WEAP 21 Website Oct 28, 2007 - May 14, 2008 32, 227 visits from 2564 cities

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

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

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

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

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

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

Building expressions Use the time series wizard or expression builder

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

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

Results Displayed on the Map

Scenario Explorer Favorite charts can be selected to give quick overviews

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

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

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

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

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

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

Financial Analysis Specify variable and fixed costs and revenues

Water Quality Specify pollutant loadings

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

Linking WEAP to Other Software n Customized/Programmed links n n n User-defined links to dynamic-link libraries n n n Groundwater flow model n MODFLOW Surface water quality model n Qual 2 K California Department of Water Resources n Delta salinity model East-Bay Municipal Utilities District n Reservoir operations model Call WEAP using application programming interface (API) n n n Scenario analysis n CARS (RAND Corporation) Model calibration n PEST Sensitivity analysis n VB script

Linking WEAP to MODFLOW

Linking WEAP to MODFLOW

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