C2VSimCG v1.0

Description

_(Released November 17, 2022)_ The California Central Valley Groundwater–Surface Water Simulation Model - Coarse Grid (C2VSimCG) is an integrated hydrologic model that simulates the movement of water through the linked land surface, groundwater, and surface water flow systems in the 20,000 square mile area defined by the alluvial Central Valley Aquifer. C2VSimCG was developed using the Integrated Water Flow Model (IWFM2015) application, an open-source software package that couples a three-dimensional finite element groundwater flow simulation component with one-dimensional land surface, stream flow, lake, unsaturated zone, and small-stream watershed components. C2VSimCG Version 1.0 dynamically calculates crop water demands, allocates contributions from precipitation, soil moisture and surface water diversions, and calculates the supplementary groundwater pumping required to meet the remaining unmet consumptive water demands. The model simulates the response of the Central Valley’s groundwater and surface water flow system to predefined stresses and can also be used to simulate the alternative scenarios. Two applications of the C2VSimCG v1.0 are available: __Historical Run:__ Simulates the historical period for water years 1974 through 2015. The input data uses historical values for precipitation, land use, evapotranspiration, reservoir releases, and surface water diversions. Required groundwater pumping is computed dynamically. __Baseline Runs:__ The baseline model represents “Existing Conditions” and serves as a representation of the historical hydrology with a current level of land use development and water demands. The C2VSimCG Baseline model can be run with two sets of initial conditions for groundwater levels: pre-drought conditions (representing Fall 2010-2012) and post-drought conditions (representing Fall 2018-2020). Each simulation runs for water years 1922-2015, a period of 94 years.

Resources

Name Format Description Link
33 Document that briefly describes running the C2VSimCG model https://data.cnra.ca.gov/dataset/2ab6f468-85db-4afc-b930-f1cb7f0bdb7f/resource/59b08fac-4c3d-42f1-b74f-3eca1ef1f585/download/roadmap-to-running-c2vsimcg.pdf
57 This package includes several documents: 1. Volume I: C2VSimCG model development and calibration 2. Volume II: C2VSimCG user's manual 3. Appendix A: C2VSimCG stream inflows, diversions and bypass flows 4. Appendix B: C2VSimCG modifications for the simulation of Sacramento-San Joaquin Delta 5. Technical Memorandum: Description of C2VSimCG baseline https://data.cnra.ca.gov/dataset/2ab6f468-85db-4afc-b930-f1cb7f0bdb7f/resource/ddc8b981-47fb-4047-9c56-11a4246c0793/download/c2vsimcg_v1.0_docs.zip
57 This package provides shapefiles for the C2VSimCG model framework https://data.cnra.ca.gov/dataset/2ab6f468-85db-4afc-b930-f1cb7f0bdb7f/resource/8999759e-1818-4bd2-b0f3-75ac2b747545/download/c2vsimcg_v1.0_gis.zip
57 This package includes three model runs: 1. Historical run (water years 1974 through 2015) 2. Baseline with land use fixed at existing conditions and groundwater initial conditions representing pre-drought (fall 2010-2012) 3. Baseline with land use fixed at existing conditions and groundwater initial conditions representing post-drought (fall 2018-2020) The package does not include model outputs to keep the file size to a minimum. Instead, Excel files summarizing the water budgets are provided. If raw outputs are desired, the model(s) can be run following the instructions in the __Roadmap to Running C2VSimCG Model__ document. https://data.cnra.ca.gov/dataset/2ab6f468-85db-4afc-b930-f1cb7f0bdb7f/resource/238472d0-60ec-44d3-ab82-707daca74038/download/c2vsimcg_v1.0_runs.zip

Tags

  • central-valley
  • groundwater
  • integrated-hydrologic-model
  • c2vsim
  • hydrologic-modeling
  • iwfm
  • water-demand
  • california-department-of-water-resources

Topics

Categories