Search datasets
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This dataset is the digital hydrologic unit boundary layer for the 8-digit subwatershed boundaries for the conterminous United States. This dataset is intended to be used with the following two...
Search relevance: 185.91 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 08:00 PM -
This file (SWSHED12) is a statewide digital watershed file. It was created primarily for state and federal agency use. The watersheds define Strahler (Strahler 1952 p. 1120) third order stream...
Search relevance: 185.41 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:47 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. This file (SWSHED12) is a statewide digital watershed file. It was created primarily for state and...
Search relevance: 181.22 | Views last month: 7 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
This file (SWSHED12) is a statewide digital watershed file. It was created primarily for state and federal agency use. The watersheds define Strahler (Strahler 1952 p. 1120) third order stream...
Search relevance: 139.26 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:47 PM -
Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Hydrologic units through four levels were created in the 1970's and have been used extensively throughout...
Search relevance: 113.54 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Hydrologic units through four levels were created in the 1970's and have been used extensively throughout...
Search relevance: 113.54 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:49 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Hydrologic...
Search relevance: 109.03 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:48 PM -
Stronghold Watersheds were developed to provide information about the location of important 12-digit watersheds within Maryland for the conservation of primarily freshwater fish and mussel species...
Search relevance: 66.97 | Views last month: 1 | Catalog Last Checked: October 06, 2026 at 10:01 PM -
Stronghold Watersheds were developed to provide information about the location of important 12-digit watersheds within Maryland for the conservation of primarily freshwater fish and mussel species...
Search relevance: 66.97 | Views last month: 1 | Catalog Last Checked: October 06, 2026 at 10:03 PM -
Polygon geometry with attributes displaying digital elevation model (DEM) delineated watershed boundaries ranging from hydrologic unit code (HUC) 8 digit to 16 digit. The attribute data includes...
Search relevance: 66.52 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:27 PM -
This USGS data release includes a shapefile of outlet point locations for selected 12-digit hydrologic units (HU12s) from the Watershed Boundary Dataset (WBD), dated August 13, 2020 (U.S....
Search relevance: 60.02 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 08:52 PM -
A subset of watersheds created for the Blue Infrastructure Project (BI) based on the DNR 12 digit watershes as follows; This file (SWSHED12) is a statewide digital watershed file. It was created...
Search relevance: 59.93 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
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: 59.72 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 08:39 PM -
A subset of watersheds created for the Blue Infrastructure Project (BI) based on the DNR 12 digit watershes as follows; This file (SWSHED12) is a statewide digital watershed file. It was created...
Search relevance: 59.54 | Views last month: 0 | Catalog Last Checked: September 10, 2026 at 06:46 PM -
Excel files have percentage impervious cover estimates for the Chesapeake Bay region from 30 m 1 m data for six assessment units - 12-digit hydrologic units (watersheds), the riparian zones for...
Search relevance: 55.02 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:55 PM -
The U.S. Geological Survey (USGS), in cooperation with the Vermont Agency of Transportation (VTrans), derived watershed boundaries for the State of Vermont at the 1-meter resolution using lidar...
Search relevance: 54.75 | Views last month: 0 | Catalog Last Checked: October 01, 2026 at 02:04 AM -
In this study, we developed a methodology for evaluating holistic sustainability of alternative riparian buffer zone (RBZ) designs or decision management objectives. We demonstrated the...
Search relevance: 49.90 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 06:59 PM -
This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and...
Search relevance: 49.48 | Views last month: 3 | Catalog Last Checked: August 03, 2026 at 04:39 AM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. A subset of watersheds created for the Blue Infrastructure Project (BI) based on the DNR 12 digit...
Search relevance: 48.70 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 06:46 PM -
Fish occurrence data to support high-resolution distribution models and test various community and macroecological hypotheses have not been available at the national scale. We present IchthyMaps,...
Search relevance: 48.15 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 10:01 PM
