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MODFLOW-NWT groundwater flow model used to evaluate groundwater flow in the Elkhorn and Loup River Basins, Central Nebraska, Phase Three: U.S. Geological Survey data release

Metadata Updated: October 26, 2023

The U.S. Geological Survey (USGS) refined the spatial and temporal discretization of a previously modeled area (Phase 1: and Phase 2: which focused on a 30,000-square-mile area of the High Plains aquifer. Regional groundwater-flow models were constructed to evaluate the effects of groundwater withdrawal on stream base flow in the Elkhorn and Loup River Basins, Nebraska. The model was calibrated to match groundwater level and base-flow data from the stream-aquifer system during the pre-1940 through 2010 period (including predevelopment [pre-1895], early development [1895–1940], and historical development [1940 through 2010] conditions) using an automated parameter- estimation method. The calibrated model was then used to simulate hypothetical development conditions (2011 through 2060). To assess the impact of wells on aquifer depletions, additional wells were simulated throughout the model domain and pumped for 50 years. The percentage of each well’s withdrawal after 50 years, which was compensated by aquifer reductions to stream base flow, storage, or evapotranspiration, was computed and mapped. This data release also includes the MODFLOW-NWT (version 1.0.7) source code. This USGS data release contains all of the input and output files for the model described in the associated model documentation report (

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023
Publisher U.S. Geological Survey
Identifier USGS:e812b36d-631c-49c2-9c7d-6873be715bdb
Data Last Modified 20201117
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 0a5edfab-6cf6-40fe-b577-2fe9b5d50d16
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -102.142168073,40.581077344,-97.251923792,42.959968
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash a7d15c0bf1e0edadc9576099095e4cadda043efc05a47d904d991ee1dc053462
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -102.142168073, 40.581077344, -102.142168073, 42.959968, -97.251923792, 42.959968, -97.251923792, 40.581077344, -102.142168073, 40.581077344}

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