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 population density (gwava-dw_popd)
This data set represents 1990 block group population density, in
people per square kilometer, in the conterminous United States.
This data set represents
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 …