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Projected water table depths in coastal areas around Puget Sound, Washington

Metadata Updated: July 6, 2024

To predict water table depths, seamless unconfined groundwater heads for coastal groundwater systems around Puget Sound (Washington State) were modeled with homogeneous, steady-state MODFLOW simulations. The geographic extent examined was defined primarily by watershed boundaries. Steady-state MODFLOW groundwater flow models were used to obtain detailed (50-meter-scale) predictions over large geographic scales (100s of kilometers) of groundwater heads for both current and future sea-level rise (SLR) scenarios (0, 0.25, 0.5, 1, 1.5, 2, 2.5, and 3 m) using 3 spatially varying hydraulic conductivities (K); one based on published K's, one with published K's reduced by a factor of 10 (K0.1), and one with published K's increased by a factor of 10 (K10), to assess the sensitivity of model results to K. All models had variable thicknesses with cell tops at the land surface and bottoms at 0m NAVD88 to ensure that steep groundwater gradients in topographically steep and/or high-recharge watersheds did not result in model convergence failure. The models were run with a local mean higher-high water (MHHW) marine boundary condition and with groundwater reaching the land surface removed from the model, simulating loss via natural drainage. Because of the large number of lakes in this region and the influence of lakes on adjacent groundwater levels, large (> 0.5 km2) lake heads mostly were fixed in the model at published present-day levels. In sea-level rise cases where lake elevations would have been below model sea level, lake elevations were set at model sea level. Modeled groundwater heads were then subtracted from high-resolution topographic digital elevation model (DEM) data to obtain water table depths.

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 May 3, 2024
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date May 3, 2024
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/97e842c4728b03768f736a5a1ea8217a
Identifier USGS:ae5c759c-30ab-4094-9f6a-852c97b1a769
Data Last Modified 20240427
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://datainventory.doi.gov/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 38e6b52c-26c7-4ff8-8a69-6e0f91d3bc67
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -124.764478,46.761722,-121.431864,49.002088
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash ea5e767bbe6f2eb435fd8ed82792d3d84afb12b24dc99d0da898676cd89b7460
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -124.764478, 46.761722, -124.764478, 49.002088, -121.431864, 49.002088, -121.431864, 46.761722, -124.764478, 46.761722}

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