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水是地球上重要的物质,也是人类生存环境的要素,可供人类开发和利用的水是最宝贵的资源。它是人类社会经济可持续发展的重要条件。因此,正确评价水资源问题是十分重要的。人均水资源量是衡量一个国家或地区水资源短缺程度的比较指标。这个指标涉及水资源总量计算和某年的人口水平。《水文》1996年4期刊物中,水利部水文司对我国水资源在世界的排位作了考证。(1)水资源总量(世界一般以河川年径流总量计算,单位×
Water is an important substance on earth and also an essential element of the living environment of mankind. Water that is available for human exploitation and utilization is the most precious resource. It is an important condition for the sustainable development of human society and economy. Therefore, it is very important to correctly evaluate the issue of water resources. The per capita amount of water resources is a comparative indicator to measure the degree of water shortage in a country or region. This indicator relates to the calculation of the total amount of water resources and the population level of a certain year. Hydrology In 1996 4 issue, the Hydrology Division of the Ministry of Water Resources made a research on the ranking of China’s water resources in the world. (1) The total amount of water resources (the world is generally calculated as the total river runoff, unit ×