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水是生命的源泉,是生态系统不可缺少的要素,同土地、能源等构成人类经济与社会发展的基本条件。随着人口与经济的增长,世界水资源的需求量不断增加,水环境又不断恶化,水资源紧缺已成为世人共同关注的全球性问题。1997年1月,联合国在《对世界淡水资源的全面评价》的报告中指出:缺水问题将严重制约21世纪经济和社会发展,并可能导致国家间的冲突。我国水资源人均拥有量只占世界平均水平的1/4,在640多座
Water is the source of life, an indispensable element of the ecosystem, and the basic conditions of human economic and social development with land and energy. With population and economic growth, the world’s water resources are in increasing demand and the water environment is deteriorating. The shortage of water resources has become a global issue of common concern to all people. In January 1997, the UN stated in its report “Comprehensive Assessment of the World’s Freshwater Resources” that the problem of water shortage will severely constrain economic and social development in the 21st century and may lead to conflicts among nations. China’s water resources per capita only accounts for 1/4 of the world average, at more than 640 seats