Stream, Lagoon, or Other Wastewater (not including tailwater recovery) as an Irrigation Source on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice ISO04

This data set represents the estimated percentage of the 1-km grid cell that is covered by or subject to
the agricultural conservation practice (CPIS04), Stream, Lagoon or Other Waste Waster (not including
tailwater recovery) as an Irrigation Source (LWWIS) on agricultural land by county. Stream, Lagoon or
Other Waste Waster (not including tailwater recovery) as an Irrigation Source is described as an
"impoundment made by excavation or earthfill for biological treatment of animal or other agricultural
waste." (U.S. Department of Agriculture, 1995) This data set was created with geographic information
systems (GIS) and database management tools. The acres on which LWWIS's are applied were totaled
at the county level in the tabular NRI database and then apportioned to a raster coverage of agricultural
land within the county based on the Enhanced National Land Cover Dataset (NLCDe) 1-kilometer
resolution land cover grids (Nakagaki, 2003). Federal land is not considered in this analysis because
NRI does not record information on those lands.