Datasets

Description:

NHDPlus is a national hydrography dataset of surface water features, including stream segments and their associated elevation-derived catchments, that form a seamless national network of streams. In addition to surface water features, this dataset also includes mean annual and mean monthly streamflow estimates based on runoff from the USGS national flow balance model, as well as stream slope, stream order, and a group of attributes that enable rapid stream network navigation. NHDPlus catchments can be used to associate other landscape attributes, such as land cover, with stream segments.
NHDPlus integrates stream network features from the original National Hydrography Dataset (NHD) with 10 meter gridded land surface elevation data from the National Elevation Dataset (NED), and hydrologic unit boundaries from the National Watershed Boundary Dataset (WBD). Since NHDPlus is produced from static snapshots of these three datasets, it includes the features of these ingredient datasets as well.
There is an updated, high-resolution version of this dataset called NHDPlus HR that is actively being developed and updated.

Citation:

McKay, L., Bondelid, T., Dewald, T., Johnston, J., Moore, R., and Rea, A., 2012, NHDPlus Version 2: User Guide, https://www.epa.gov/waterdata/nhdplus-national-hydrography-dataset-plus

Additional Information: