WEAP Future Scenarios Model for Water Plan Update 2023
California Water Code Section 10004.6 requires the California Department of Water Resources (DWR) to quantify current and future water conditions in the state. This information is published in the California Water Plan (Water Plan), which is updated every five years. Water Plan Updates 2005, 2009, 2013, 2018 and 2023 have progressively developed a Water Evaluation And Planning (WEAP) model for assessing the impacts of climate change on California water resources and infrastructure, as well as the adaptation strategies needed and available to improve regional water resilience. Update 2023 brought significant improvements to input data and process in the model as described in the model documentation provided in the resources. The current WEAP model is called the WEAP-CVPA model as it covers the Central Valley of California at the planning area scale. The model was run on WEAP version 2021.0.2.2 but is compatible with newer versions of WEAP based on limited testing. Included in this dataset is: * The model itself with input files provided as a zip file * A link to SEI’s website where the software to run and view the model can be downloaded * The documentation for the model that was released as part of the California Water Plan Update 2023 * 4 CSVs with the post processed data from the study that were used to create the Future Scenarios Interactive Data Explorer, separated by summary vs detailed response surface as well as by planning area metrics vs points of interest metrics * A link to the Future Scenarios Interactive Data Explorer where the post processed results and response surfaces available at the planning area level * The raw exports from the model of the level 2070 that were post processed to create the data that informed the Water Plan Update 2023 * Spatial Boundaries for Water Plan Planning Areas which were used as the basis for spatial areas in the WEAP model
Data files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
WEAP-CVPA Model WEAP-CVPA model used in Future Scenarios for Update 2023. | Download | ZIP | 05/15/24 |
Planning Area Model Results Post processed Planning Area level results from the future scenarios analysis for Update 2023. | Download | CSV | 05/15/24 |
Response Surfaces for Planning Area Metrics Post processed response surface Planning Area level results from the future scenarios analysis for Update 2023. | Download | CSV | 05/15/24 |
Points of Interest Results Post processed results for Points of Interest from the future scenarios analysis for Update 2023. | Download | CSV | 05/15/24 |
Response Surfaces for Points of Interest Post processed response surface for Points of Interest from the future scenarios analysis for Update 2023. | Download | CSV | 05/15/24 |
Raw Model Exports of Future Scenarios at 2070 level of development Model exports from 42 perturbations of climate with temperature ranging from a 0 °C increase in temperature to a 5 °C increase in 1°C increments and precipitation ranging from a -30 percent reduction in average annual precipitation to a 30-percent increase in average annual precipitation in 10-percent increments. Each perturbation of temperature and climate includes an 1,100-year-long, Paleo-based simulation period (WY 901–WY 2000) that was divided into 22 distinct 50-year cycles, each starting from the same initial conditions. The naming structure of the files explains which perturbation/50-year cycle that data corresponds to. The code will show something like: "0_7DP2DT", the "0_7DP" indicates 70% precipitation (also known as -30% precipitation) and "2DT" indicated a 2-degree temperature increase. At the end of the file names "cycle19" tells you which cycle that data corresponds to starting from 901-2000 in 50-year chucks, with cycle 19 being 1801-1850. Finally, a metric number will be included with each file that lets you know which metric the information was related to with metric 1 being surface water reservoirs, metric 2 being instream flow, metric 3 being agricultural demand, metric 4 being urban demand, metric 5 being 90th percentile flows, and metric 6 being groundwater. Please see the full report listed in the dataset for more details on how this data was synthesized. | Download | ZIP | 05/15/24 |
Supporting files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Download WEAP software Stockholm Environmental Institute (SEI) develops the Water Evalutation And Planning (WEAP) Tool. An evaluation version of the tool can be downloaded and used to evaluate the model for free, although if you want to save any changes, you will need to purchase a license from SEI. | Download | 05/15/24 | |
Future Scenarios for Update 2023 Documentation - From Climate Traces to Climate Insights: Future Scenarios Analysis for the California Central Valley Documentation of the Future Scenarios for Update 2023 project including model updates, explanation of how metrics were developed, and discussion of results. | Download | PDF | 05/15/24 |
Future Scenarios Interactive Data Explorer Future Scenarios Interactive Data Explorer is an interactive tableau dashboard that provides the opportunity to explore the post processed future scenarios results through an intuitive web-based interface. | Download | 05/15/24 | |
Water Plan Planning Areas Spatial boundaries used in the future scenarios for Update 2023. The model includes some splits of planning areas on the valley floor for improved model representation. | Download | 05/15/24 |