National Hydrography

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The National Geospatial Program manages the National Hydrography Dataset (NHD)Watershed Boundary Dataset (WBD), and NHDPlus High Resolution (NHDPlus HR). These geospatial datasets map and model the surface water of the United States.

Update National Hydrograpy with the Markup App

Update National Hydrograpy with the Markup App

Have a correction or update for the NHD, WBD, or NHDPlus High Resolution? Visit the Markup App!

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NHDPlus HR - the Next Generation of National Hydrography

NHDPlus HR - the Next Generation of National Hydrography

 Check out the NHDPlus High Resolution (NHDPlus HR) framework - a new, integrated hydrography and elevation dataset

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Get the NHD Newsletter to keep up with the latest Hydrography info

Get the NHD Newsletter to keep up with the latest Hydrography info

Sign up to recieve the National Hydrography Dataset newsletters for updates, information, and the hydro quiz!

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The National Hydrography Dataset (NHD)Watershed Boundary Dataset (WBD), and NHDPlus High Resolution (NHDPlus HR) are geospatial datasets that map and model the surface water of the United States.

Together, the National Hydrography Dataset (NHD) and  Watershed Boundary Dataset (WBD) form a rich data suite that map the Nation’s surface water network and hydrologic unit areas. The NHD, at 1:24,000 scale or better, represents the nation’s hydrologic drainage networks and related features, including rivers, streams, canals, lakes, ponds, glaciers, coastlines, dams, and streamgages. The WBD represents drainage areas of the country in eight nested levels. The NHD and WBD are the most up-to-date and geographically inclusive hydrography datasets for the Nation.

To link the stream network to the landscape and calculate important attributes like stream order and estimated streamflow, the USGS is currently developing the nationwide NHDPlus High Resolution (NHDPlus HR) framework, an integrated hydrography and elevation dataset that includes the NHD stream network, elevation-based polygonal catchment drainage areas, flow direction and flow accumulation rasters, and value added attributes (VAAs) that enhance stream network navigation, analysis, and data display. The NHDPlus HR is built using the NHD at 1:24,000 scale or better, 1/3 arc-second seamless 3DEP data, and nationally complete WBD. Additionally, a new attribute, the VisibilityFilter, is being calculated for the NHD and NHDPlus HR data, allowing vector data features to be displayed at eight approximate map scales. This supports the use of NHDPlus HR for modeling and assessment down to a local level, while still nesting into the national context.

The NHD and WBD are managed by the USGS under OMB Circular A-16 and as a part of the FGDC NGDA Inland Water Theme, with collaboration, support, and cost-sharing with many other federal, state, and local entities. This includes formalized Stewardship Agreements with partners to improve the NHD and WBD locally. Many tools exist to help with editing of the data, and many user resources are available.

Direct download links and web-based map service information are available from the Access National Hydrography Products page. Downloads via interactive map are available from The National Map Download viewer, and all web-based map services are listed at The National Map Service Endpoints page.

Join our community! We communicate monthly through the NHD Newsletters and NHD/WBD Advisory Calls, and hold special seminars and workshops as well. Please visit the News tab on the left for more information.

 

 

News

Date published: June 13, 2019

National Hydrography May 2019 Newsletter released

The USGS National Hydrography Dataset Newsletter, Vol. 18, No. 5, May 2019 has been released and posted for viewing.

Date published: May 16, 2019

National Hydrography April 2019 Newsletter released

The USGS National Hydrography Dataset Newsletter, Vol. 18, No. 2, February 2019 has been released and posted for viewing.

Date published: April 1, 2019

National Hydrography March 2019 Newsletter released

The USGS National Hydrography Dataset Newsletter, Vol. 18, No. 2, February 2019 has been released and posted for viewing.