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随着我国工农业的发展和人口的增多,对水资源的需求越来越迫切。这需求包括量和质两个方面。在量的方面,强调节约用水,提高水的重复利用率是非常重要的;在质的方面,国家制订了一系列的水质标准来评价、控制供水水体的水质。一般来讲,在总用水量中工农业用水量占80%,人口生活用水量占20%。人口生活用水量中饮用水量占5%左右,其余绝大部分为洗濯用水。这样,与人们身体健康直接有关的饮用水量仅占总用水量的1%,
With the development of industry and agriculture in our country and the increase of population, the demand for water resources is more and more urgent. This requirement includes both quantitative and qualitative aspects. In terms of quantity, it is very important to emphasize water conservation and water reuse. In terms of quality, the country has formulated a series of water quality standards to evaluate and control the water quality of water bodies. In general, agricultural and industrial water use accounts for 80% of the total water use and domestic water consumption accounts for 20%. The amount of drinking water in the population living in about 5%, most of the rest for washing water. In this way, the amount of drinking water that is directly related to people’s health is only 1% of the total water consumption,