Irrigation Water Conveyance by Ditch and Canal on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 428

Release Date

2004-01-01

Time Period

1992

Publication Date

2023-09-15

Wieczorek, M.E., 2004, Irrigation Water Conveyance by Ditch and Canal on Agricultural Land in the Conterminous United States, 1992: National Resource Inventory Conservation Practice 428: U.S. Geological Survey data release, https://doi.org/10.5066/P91RT0Q7.

Type: browseImage

This dataset was created for two main purposes; (1) summarize and provide refined spatial detail to attributes of agricultural practices from the 1992 NRI dataset; and (2) to support hydrologic modeling. The U. S. Geological Survey's (USGS) National Water-Quality Assessment (NAWQA) program is using the spatially refined IWCDC dataset to produce ancillary information for characterizing surface and ground-water sampling sites. Calculation of percentages of NAWQA study areas treated by Irrigation Water Conveyance by Ditch and Canal is one example of the type of use of this data set. The 1992 NRI data was used because it was created in the same early to mid-1990s time frame as the NLCD. NAWQA plans on processing the NRI in this fashion every 5 years as new NRI and NLCDE data are published.

• Model Data Management Function (MDMF)