Potential Grazing Land Within the Pacific Drainages of the Western United States, 2011
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The U.S. Geological Survey (USGS) is developing SPARROW models (SPAtially Related Regressions On Watershed Attributes) to assess the transport of contaminants (e.g.,...
美国地质调查局（U.S. Geological Survey, USGS）正在开发SPARROW模型（SPAtially Related Regressions On Watershed Attributes），以评估污染物的迁移过程（例如……）
