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一沂沭泗河水系属淮河流域,介于淮河以北(以废黄河为界)与黄河以南,东临黄海,呈三角形地带。行政区划涉及苏鲁豫皖四省,主要包括山东省南部菏泽、济宁、枣庄、临沂及江苏省北部徐州、淮阴、连云港等地市,55个县,流域面积79000平方公里,耕地5600万亩,人口3700万人。沂沭泗河水系由沂河、沭河、泗运河三大支流组成,均发源于沂蒙山区。沂沭河为南北向平行水流。沂河发源于鲁山南麓,流经田庄、沂源、跋山、沂水、临沂、刘家道口、江风口,于苗圩汇入骆马湖,
A Yishusi River belongs to the Huaihe River Basin, between the north of the Huaihe River (bordered by the waste Yellow River) and the Yellow River to the south, with the Yellow Sea to the east and a triangular zone. Administrative divisions involve the four provinces of Sulu, Yuwan and Anhui, mainly including Heze, Jining, Zaozhuang, Linyi and Xuhui, Lianyungang and other cities and counties in southern Shandong Province, 55 counties, the basin area of 79000 square kilometers, 5600 acres of arable land, population 3700 Million people. Yishusi River by the Yi River, Shuhe, Si Yun three tributaries, are originated in Yimeng Mountain. Yishu River parallel to the north-south flow. Yi River originates in the south of Lushan, flows through Grange, Yiyuan, Bashan, Yishui, Linyi, Liu crossing, Jiang Fengkou, in Miao Wei import Luoma Lake,