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GroMoPo Metadata for Nebraska Sand Hills lake/wetland model


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Created: Feb 08, 2023 at 4:18 a.m.
Last updated: Feb 08, 2023 at 4:18 a.m.
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Abstract

The feasibility of a hydrogeological modeling approach to simulate several thousand shallow groundwater-fed lakes and wetlands without explicitly considering their connection with groundwater is investigated at the regional scale (similar to 40,000 km(2)) through an application in the semi-arid Nebraska Sand Hills (NSH), USA. Hydraulic heads are compared to local land-surface elevations from a digital elevation model (DEM) within a geographic information system to assess locations of lakes and wetlands. The water bodies are inferred where hydraulic heads exceed, or are above a certain depth below, the land surface. Numbers of lakes and/or wetlands are determined via image cluster analysis applied to the same 30-m grid as the DEM after interpolating both simulated and estimated heads. The regional water-table map was used for groundwater model calibration, considering MODIS-based net groundwater recharge data. Resulting values of simulated total baseflow to interior streams are within 1% of observed values. Locations, areas, and numbers of simulated lakes and wetlands are compared with Landsat 2005 survey data and with areas of lakes from a 1979-1980 Landsat survey and the National Hydrography Dataset. This simplified process-based modeling approach avoids the need for field-based morphology or water-budget data from individual lakes or wetlands, or determination of lake-groundwater exchanges, yet it reproduces observed lake-wetland characteristics at regional groundwater management scales. A better understanding of the NSH hydrogeology is attained, and the approach shows promise for use in simulations of groundwater-fed lake and wetland characteristics in other large groundwater systems.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
United States
North Latitude
42.7992°
East Longitude
-99.7370°
South Latitude
41.6920°
West Longitude
-101.8025°

Content

Additional Metadata

Name Value
DOI 10.1007/s10040-017-1691-0
Depth
Scale 10 001 - 100 000 km²
Layers 1
Purpose Groundwater resources
GroMoPo_ID 194
IsVerified True
Model Code MODFLOW
Model Link https://doi.org/10.1007/s10040-017-1691-0
Model Time
Model Year 2018
Model Authors Rossman, NR; Zlotnik, VA; Rowe, CM
Model Country United States
Data Available Report/paper only
Developer Email nrossman@huskers.unl.edu
Dominant Geology Model focuses on multiple geologic materials
Developer Country USA
Publication Title An approach to hydrogeological modeling of a large system of groundwater-fed lakes and wetlands in the Nebraska Sand Hills, USA
Original Developer No
Additional Information
Integration or Coupling
Evaluation or Calibration Static water levels
Geologic Data Availability

How to Cite

GroMoPo, D. Kretschmer (2023). GroMoPo Metadata for Nebraska Sand Hills lake/wetland model, HydroShare, http://www.hydroshare.org/resource/4534396a07624a1bacf294e6b2d26b90

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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