鲁西南的南四湖之湖西地区,河道淤积严重。仅就入湖的两条大型防洪排涝的河道而言,东鱼河全长172公里,流域面积5923平方公里,1971～1979年实测淤积2730万立米;洙赵新河长141公里,流域面积4206平方公里,1972～1979年实测淤积1161万立米。两条河合计淤积3891万立米,平均占两条河开挖土方工程量的36%,若用挖泥船清淤,按2.6元/立 Southwest Lushu Lake West Lake, siltation serious. Only for the two large-scale flood control and drainage river into the lake, the East Fish River, a total length of 172 km, the basin area of ​​5923 square kilometers, 1971 ~ 1979 measured deposition of 27.3 million cubic meters; soo Zhao Xinhe 141 km long, the basin area of ​​4206 square kilometers From 1972 to 1979, the measured sedimentation was 11.61 million cubic meters. The total deposition volume of the two rivers is 38.91 million cubic meters, accounting for an average of 36% of the earthworks for excavation of the two rivers. If dredging silt is dredged, it will be 2.6 yuan /