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中文摘要：
目标ET（evapotranspiration）是当今水资源研究的前沿，基于目标ET的区域水资源管理是针对一定范围（区域）内的综合ET值与当地的可利用水资源量的对比关系，进行水资源的分配或对ET进行控制的管理办法。通过提高水资源的利用效率，减少社会水分循环系统中不可回收水量，使同等水分消耗条件下生产效率得以大幅提高，从而达到资源节水的目的；在满足地下水不超采、农民不减收、环境不破坏的条件下进一步合理分配各部门和各行业可用水量，通过调整产业结构和应用各种节水新技术新方法，解决各部门和各行业（包括环境和生态用水）之间的竞争用水问题，达到整个区域的水量平衡。根据资源节水的理念，提出区域目标ET的定义、分项指标体系和制定原则，并结合分布式水文模型和土壤墒情提出一套计算区域目标ET的方法体系。
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