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山东省淮河流域位于沂沭泗水系上游,面积48611平方公里,占全省面积的32%,京杭运河和南四湖贯穿其中。按水系,分为沂沭河和南四湖两大流域。南四湖介于现黄河与废黄河之间,地势四面高,中间低洼,湖东为山丘区,湖西为平原区,流域内的水都汇入南四湖,湖的排水口仅有韩庄运河(蔺家坝现已堵闭),一般年份泄量约为300立方米每秒。1957年遇到90年一遇暴雨,由于在此之前治淮重点放在沂沭河流域,南四湖未加治理,造成极为严重的灾害。受灾农田1894.5万亩,倒塌房屋229.6万间,死亡881人,伤5350人。滨湖积水消退缓慢,180万亩麦田没有种上。与此同时,沂沭河流域也遇到罕见的暴雨,沂河最大洪峰流量15400立方米每秒,沭河
The Huaihe River Basin in Shandong Province is located in the upper reaches of the Yishusu River system, with an area of 48,610 square kilometers, accounting for 32% of the total area of the province, with the Grand Canal and the Nansi Lake running through it. By water system, divided into Yishu River and Nansi Lake two major river basins. Nansi Lake is between the present Yellow River and the waste Yellow River. The terrain is surrounded by high and low in the middle. The hilly area is a hilly area and the lake is a plains area. The water in the drainage basin flows into Nansi Lake. Zhuang Canal (Linjiaba now blocked), the general year of about 300 cubic meters of discharge per second. In 1957, there was a torrential rain in 90 years. Since prior treatment of Huaihe River was focused on the Yishu River basin, Nansi Lake was left unmanaged, causing extremely serious disasters. 1894.5 mu of farmland was affected, 2,296,000 houses collapsed, 881 dead and 5350 injured. Lake water slowly subsided, 180 acres of wheat fields did not planted. At the same time, the Yishu River Basin also encountered rare rainstorm, Yi River largest peak flow of 15400 cubic meters per second, Shuhe