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天然水的地区分布很不均匀,每年来水的数量不同,在年内又往往集中在少数月份,因此与人类用水多有矛盾。为了解决这些矛盾,人们做了一系列水利工程。其中:“水库”可以把江河流动的淡水储存起来,供工农业和城市生活之用,控制洪水,除害兴利,改善环境。我国是世界上水库最多的国家,有大大小小的水库8万多座,总库容4800亿
The distribution of natural water is very uneven. There are different quantities of water each year. During the year, they tend to be concentrated in a few months. Therefore, there are contradictions in the use of natural water. In order to solve these contradictions, people have done a series of water conservancy projects. Among them: “Reservoir” can be stored freshwater flowing rivers, agriculture and urban life for use, control of floods, detrimental benefits and improve the environment. China is the country with the largest reservoir in the world, with more than 80,000 reservoirs of all sizes, with a total capacity of 480 billion