MODFLOW-2005 model and supplementary data used to characterize groundwater flow and effects of pumping in the Death Valley regional groundwater flow system, Nevada and California, with special reference to Devils Hole
Dates
Release Date
2020-01-01
Start Date
1913-01-01
End Date
2020-01-01
Publication Date
2023-09-15
Citation
Jackson, T.R. and Halford, K.J., 2020, MODFLOW-2005 model and supplementary data used to characterize groundwater flow and effects of pumping in the Death Valley regional groundwater flow system, Nevada and California, with special reference to Devils Hole: U.S. Geological Survey data release, https://doi.org/10.5066/P9HIYVG2.
Summary
A three-dimensional, groundwater model (MODFLOW-2005) was developed to determine effects of future (2019–2100) groundwater development on water levels and natural discharges in the Alkali Flat–Furnace Creek Ranch (AFFCR), Ash Meadows, Pahute Mesa–Oasis Valley (PMOV), and Pahrump to Death Valley South (PDVS) groundwater basins, southern Nevada and California. Two pumping scenarios were developed. Scenario 1 assumed pumping continues at the current (2018) rate through 2100. Scenario 2 assumed all pumping stops in 2018 so that recovery can be observed from 2019–2100. Input and output files for the predictive simulations are in the model and output directories, respectively. The predictive model was calibrated with PEST using a multi-model [...]
Summary
A three-dimensional, groundwater model (MODFLOW-2005) was developed to determine effects of future (2019–2100) groundwater development on water levels and natural discharges in the Alkali Flat–Furnace Creek Ranch (AFFCR), Ash Meadows, Pahute Mesa–Oasis Valley (PMOV), and Pahrump to Death Valley South (PDVS) groundwater basins, southern Nevada and California. Two pumping scenarios were developed. Scenario 1 assumed pumping continues at the current (2018) rate through 2100. Scenario 2 assumed all pumping stops in 2018 so that recovery can be observed from 2019–2100. Input and output files for the predictive simulations are in the model and output directories, respectively. The predictive model was calibrated with PEST using a multi-model approach, where five three-dimensional, MODFLOW-2005, groundwater-flow models were developed and coupled. The coupled models form an integrated groundwater model. Recharge and hydraulic-property distributions were estimated by simultaneously calibrating the five groundwater models, which simulated predevelopment (steady-state) flow, changes from groundwater development in the PMOV, AFFCR, and Ash Meadows groundwater basins, changes from groundwater development in the PDVS groundwater basin, drawdowns from a multiple-well aquifer test at well ER-6-1-2 main, and drawdowns from a multiple-well aquifer test at well ER-4-1 m1. The integrated model was developed to: (1) characterize predevelopment groundwater flow; (2) determine effects of historic (1913–2018) groundwater development on water levels and natural discharges; (3) estimate advective movement from underground nuclear tests; and (4) address basin-boundary uncertainty for the AFFCR, Ash Meadows, PMOV, and PDVS groundwater basins. Batch files, executables, and MODFLOW-2005, PEST, and pre- and post-processing utilities are in the ancillary directory. Supplementary data also is included in the ancillary directory, including site information, water-level data, water-chemistry data, transmissivity estimates, and drawdown estimates for observation sites. This USGS data release contains data, analyses, and model files for the simulations and analysis results described in U.S. Geological Survey Professional Paper 1863 (https://doi.org/10.3133/pp1863).
The predictive groundwater model was developed to determine effects of future (2019–2100) groundwater development on water levels and spring discharges assuming either pumping continues at the current (2018) rate or all pumping stops at present (2018). The integrated groundwater model was developed to: (1) characterize predevelopment groundwater flow; (2) determine effects of historic (1913–2018) groundwater development on water levels and natural discharges; (3) estimate advective movement from underground nuclear tests; and (4) address basin-boundary uncertainty for the AFFCR, Ash Meadows, PMOV, and PDVS groundwater basins. The development of model input and output files included in this data release are documented in U.S. Geological Survey Professional Paper 1863 (https://doi.org/10.3133/pp1863).
Preview Image
Image of the model domain and active area of the model.