Vulnerability of shallow ground water and drinking-water wells to nitrate in the United States: Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for water input (gwava-dw_wtin)
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This data set represents "water input," the ratio of the total area of irrigated land to precipitation, in square kilometers per centimeter, in the conterminous...
本数据集表征「水分输入量（water input）」，即灌溉土地总面积与降水量的比值，单位为平方千米每厘米，研究范围覆盖美国本土（conterminous...）
