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从美国中西部到密西西比河上游河谷和大湖区的泥沙输出定量化工作,对水土资源的管理、环境质量的养护和区域计划都是重要的.
The quantification of sediment output from the central and western United States to the upper Mississippi River and the Great Lakes region is important for the management of land and water resources, the conservation of environmental quality and the regional plans.