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Why has the National Hydrography Dataset (NHD) been created?

The idea is to combine spatial accuracy with detailed features, attributes, and values. Information such as flow paths, permanent reach IDs, and hydrologic ordering can now be used in modeling. The NHD is not designed to replace or supercede existing datasets, but offer users another tool with more flexibility.


Learn more: 

The National Hydrology Dataset (NHD) Web site


Tags: Groundwater, Rivers, Water, Geospatial, Measurement, Streams, Data Products, Streamgages