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MODFLOW-2000 model used to illustrate the differences in flow paths and travel times when three-dimensional kriging is used to estimate the hydraulic conductivity distribution as compared to manual determinations of hydraulic conductivity distribution

Metadata Updated: September 24, 2025

A three-dimensional (3D) groundwater flow model of the glaciated sediments around Elkhart, Indiana was constructed as part of the U.S. Geological Survey Groundwater Resources Program using lithologic records from water well logs. Texture-based hydraulic conductivities were assigned to vertical intervals along each lithology record. A three-dimensional kriging program read texture-based hydraulic conductivity values for each vertical interval and calculated a continuous 3D distribution of hydraulic conductivity for the entire model domain. The model was calibrated to hydrologic conditions in May and June of 1979. The model was used to simulate groundwater flow paths from points of recharge to points of discharge. These flow paths were compared to flow paths generated by an existing model (https://pubs.usgs.gov/wri/1997/4204/report.pdf) that was constructed using a manual approach to create the hydraulic conductivity distribution and calibrated to the same hydrologic conditions. The model using the kriged hydraulic conductivity distribution had 30 vertically discretized layers, and the model using the the manually created hydraulic conductivity distribution had two vertically discretized layers. This USGS data release contains the model input and output files for the simulations described in the associated documentation report (https://doi.org/10.3133/sir2019-5088)

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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Dates

Metadata Created Date September 12, 2025
Metadata Updated Date September 24, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 12, 2025
Metadata Updated Date September 24, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-c6781715-2ee3-4f1f-878c-1bb63198d835
Data Last Modified 2020-11-17T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id aa92c46e-1565-485d-b743-a49ee0b0a326
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -86.08502193, 41.58258243, -85.81351754, 41.78746338
Source Datajson Identifier True
Source Hash ab07be4d7c1546fe9b509d81e2da6f68aff7818524e30e29de84a8e51d5fb332
Source Schema Version 1.1
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