Nutrient generation at dairies and feedlots in the United States Pacific Northwest for 2002 summarized for NHDPlus v2 catchments

This spatial data set was created by the U.S. Geological Survey (USGS) to represent the amount of nitrogen and phosphorus generated by cattle at dairies and feedlots in the Pacific Northwest region of the United States (Hydro Region 17; Major River Basin 7 (MRB7)) during 2002 within each incremental watershed delineated in the NHDPlus v2 dataset.本空间数据集由美国地质调查局（U.S. Geological Survey, USGS）编制，旨在表征2002年美国太平洋西北地区（水文区域17；主要流域7（MRB7））内，各奶牛场与饲养场的牛只所产生的氮、磷总量，统计范围覆盖NHDPlus v2数据集内划定的每一个增量汇水区。