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中文摘要：
用水评价是水资源评价的重要内容。现行的用水评价存在4个方面的不足，即：缺乏供用耗排统一评价，缺乏用水过程与自然水循环过程的统一评价，缺乏地表用水和地下用水的统一评价，缺乏用水量与用水效率和效益的统一评价。以上4个方面的不足，导致评价结果不准，评价内容不能满足水资源管理的需要。基于流域二元水循环理论，通过理论推导，本文提出了基于流域二元水循环全过程的用水评价方法，即体现4个统一评价的评价方法：供用耗排统一评价，用水过程与自然水循环过程统一评价，地表水和地下水用水统一评价，用水量与用水效率、效益统一评价。所提出的方法对用水评价实践具有指导意义。
英文摘要：
Water use assessment is very important in water resources assessment. However, there are 4 shortages in the widely used methods of water use assessment at present, i.e. lack of unified assessment of water supply-use-consume-drainage, lack of unified assessment of water use and natural water cycle, lack of unified assessment of surface water use and groundwater use, and lack of unified assessment of water use volume, efficiency and benefit. As the result, the precision of water use assessment is not so satisfactory and the approach cannot supply enough information for water resources management. Based on dualistic water cycle theory and the concerned deduction, a new water use assessment method was brought forward, which can overcome the 4 shortages.
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