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水是生命的源泉,是人类赖以生存和发展的不可缺少的资源之一。不论是动物还是植物,都要靠水来维持最基本的生命活动。人可以几天不吃饭,却不可以几天不喝水。在现代工业中,任何工业部门也都离不开水,都会和水有直接或间接的关系。地球虽然有70.8%的面积被水所覆盖,但淡水资源却极其有限,人类真正能够利用的是江河湖泊以及地下水中的一部分,仅占地球总水量的0.26%,而且分布不均。随着人口数量的不断增加和工业的迅速发展,人类对水资源的需求以惊人的速度扩大,而日益严重的水污染却蚕食大量可供使用的水资源,以
Water is the source of life and one of the indispensable resources on which human beings depend for survival and development. Whether animals or plants, rely on water to maintain the most basic life activities. People can not eat for a few days, but can not drink a few days without water. In modern industry, any industrial sector is also inseparable from the water, and water will have a direct or indirect relationship. Although 70.8% of the Earth’s surface area is covered by water, its freshwater resources are extremely limited. What humans can really use are rivers, lakes and groundwater, accounting for only 0.26% of the Earth’s total water and are unevenly distributed. With the increasing population and the rapid industrial development, the human demand for water resources has been expanding at an alarming rate. However, the increasingly serious water pollution has eroded the large amount of water resources available to