SPARROW: Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States

Science Center Objects

The national databases used in USGS SPARROW models are available for download. Attributes from the NHDPlus data set, such as climate, geology, soils, land cover, hydrologic variables, physical characteristics, chemicals, and nutrients, are available for all catchments in the  digital stream networks (1:500K scale).

Visit the national USGS SPARROW website for a complete overview of SPARROW modeling.

 

CLIMATE

These data sets represent the average for each climatic variable for NHDPlus catchments in the conterminous United States.

 

GEOLOGY/SOILS

These data sets represent the area of each variable type in square meters compiled for NHDPlus catchments in the conterminous United States.

 

LAND

These data sets represent the estimated area of each variable type in square meters compiled for NHDPlus catchments in the conterminous United States.

 

HYDROLOGIC VARIABLES

These data sets represent the average for each flow variable for NHDPlus catchments in the conterminous United States.

 

PHYSICAL MEASURES

 

CHEMICAL

These data sets represent the average or total of each variable compiled for NHDPlus catchments in the conterminous United States.

 

STREAM AND NETWORK CATCHMENTS