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美国水资源理事会规定,联邦级水资源规划分三个级别。即:大纲研究和评价(A级);区域或流域开发规划(B级);实施研究(C级)。A级主要论述水资源有关政策及其优先重
The United States Water Board regulations, federal-level water resources plan is divided into three levels. Namely: Outline Study and Evaluation (Grade A); Regional or Watershed Development Planning (Grade B); Implementation Study (Grade C). Class A mainly discusses water resources related policies and their priorities