EnviroAtlas - Watershed Index Online Hydrologically Connected Zone Mask for the Conterminous United States
The Hydrologically Connected Zone (HCZ) Mask was determined using grid analysis to combine surface water features in the United States from three datasets: First, the surface water features from the 2011 CDL-NLCD. The CDL-NLCD, which was developed by the EnviroAtlas team, is a hybrid of the 2011 CDL produced by the …