Search datasets
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See full Data Guide here. Surface Water Quality Classifications Set: This dataset is a line and a polygon feature-based layer compiled at 1:24,000 scale that includes water quality...
Search relevance: 183.36 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 06:42 PM -
See full Data Guide here.Ground Water Classifications Polygon: Ground Water Quality Classifications is a polygon feature-based layer compiled at 1:24,000 scale that includes water quality...
Search relevance: 48.05 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:41 PM -
See full Data Guide here. Surface Water Quality Classifications Set: This dataset is a line and a polygon feature-based layer compiled at 1:24,000 scale that includes water quality...
Search relevance: 45.29 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 06:40 PM -
See full Data Guide here. Surface Water Quality Classifications Set: This dataset is a line and a polygon feature-based layer compiled at 1:24,000 scale that includes water quality...
Search relevance: 43.39 | Views last month: 12 | Catalog Last Checked: September 10, 2026 at 06:39 PM -
The Digital Elevation Model (DEM) utilized for this Willamette FIS submittal was produced by combining multiple overlapping topographic surveys for the Middle Fork and Coast Fork of the...
Search relevance: 32.79 | Views last month: 1 | Catalog Last Checked: October 29, 2026 at 07:56 AM -
The National Water Quality Network (NWQN) for Rivers and Streams includes 113 surface-water river and stream sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program...
Search relevance: 29.43 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 08:39 PM -
The digital segmented network based on watershed boundaries, ERF1-2, includes enhancements to the U.S. Environmental Protection Agency's River Reach File 1 (RF1) (USEPA, 1996; DeWald and others,...
Search relevance: 28.56 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:51 PM -
In 2016, the United States Geological Survey (USGS) began development of a regional-scale numerical model of the Long Island aquifer system, as part of the National Water Quality Assessment...
Search relevance: 28.53 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 10:05 PM -
USSOILS is an Arc 7.0 coverage containing hydrology-relevant information for 10,498 map units covering the entire conterminous United States. The coverage was compiled from individual State...
Search relevance: 28.51 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 10:32 PM -
The digital segmented network based on watershed boundaries, ERF1-2, includes enhancements to the U.S. Environmental Protection Agency's River Reach File 1 (RF1) (USEPA, 1996; DeWald and others,...
Search relevance: 28.42 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
The Knox Dolomite is currently recognized as the Knox Group. The Mascot Dolomite, the upper unit of the Knox Group, is dolomite and dolomitic limestone of Lower-Ordovician-age that occurs in the...
Search relevance: 25.81 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:15 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The digital segmented network based on watershed boundaries - ERF1-2 - includes enhancements to the...
Search relevance: 25.46 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
Locating meadow study sitesMeadow centers as recorded in the ‘Copy of sitecords_areaelev from Caruthers thesis.xls’ file delivered by Debinski in November 2012 were matched to polygons as recorded...
Search relevance: 23.13 | Views last month: 2 | Catalog Last Checked: October 03, 2026 at 02:56 AM -
This data release provides results from a watershed modelling effort to depict the use of natural infrastructure in dryland streams (NIDS), i.e., gabions, as a low-tech and low-cost, nature-based...
Search relevance: 22.45 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 10:50 PM -
In the Delta Anatomy Mapping Project, all levee anatomies were delineated using slope grids built from available LIDAR data points. LIDAR data points were converted to digital elevation models and...
Search relevance: 21.80 | Views last month: 0 | Catalog Last Checked: October 24, 2026 at 08:48 PM -
Terminal and saline lakes across the western United States serve as critical hydrologic, ecologic, and geomorphic resources. This data release provides assimilated topobathymetric elevation models...
Search relevance: 20.82 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 10:33 PM
