Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for sandstone and carbonate rocks (gwava-dw_sscb)
This data set represents the presence or absence of sandstone
and carbonate rock aquifers in the conterminous United States.
The data set was used as an input data layer for a national
model to predict nitrate concentration in ground water used for
drinking.
Nolan and Hitt (2006) developed two national models to …