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一在北京境内,有永定河、潮白河等5条较大的河流,但多是过境的河流,加之受地理、水文、气候等自然条件的影响,冬春季节流量很小,甚至断流、枯竭,常常满足不了用水需求;夏秋汛期洪峰陡涨,河槽往往难以承纳,又不时发生水害。对于北京地区的人们来说,是既盼水,又怕水。多少年来,水哺育着北京这个古老的名城,促进它的繁荣和发展;水也威胁着北京工农业生产的发展和人们生命财产的安全。兴利除害,改造自然,是北京人多年的夙愿,不少仁人志士为之进行过不懈的斗争;然而,到北京解放前夕,在这16800平方公里的城乡大地上,几乎没有一
In Beijing, there are 5 larger rivers, such as Yongding River and Chaobai River. However, most of them are rivers crossing the border. In addition, due to the influence of natural conditions such as geography, hydrology and climate, the flow in winter and spring is very small and even stops. Depleted, often can not meet the water demand; summer and autumn flood peak steep rise, often difficult to accommodate the river channel, but also from time to time water damage. For people in Beijing, it is both water and water. For years, water nurtured the ancient city of Beijing and promoted its prosperity and development. Water also threatened the development of industrial and agricultural production and the safety of people’s lives and properties in Beijing. However, until the eve of the liberation of Beijing, there were almost no urban and rural areas of 16800 square kilometers in this area