Arid land irrigation in the United States Pacific Northwest for 2001 summarized for NHDPlus v2 catchments
This spatial data set was created by the U.S. Geological Survey (USGS) to represent the area of arid land irrigation in the 
Pacific Northwest region of the United States (Hydro Region 17; Major River Basin 7 (MRB7)) during 2001 within each 
incremental watershed delineated in the NHDPlus v2 dataset.