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皖河是长江下游的一条支流,位于安徽江淮之间,源出皖西大别山,流经四个县境,在安庆市汇入长江。全程188公里,平均河道比降2.5‰,上游有长河、潜水、皖水三条支流。流域地形由西北向东南倾斜。总面积6442平方公里,耕地233.8万亩,水田占90％,人口173万,多年平均迳流量48.6亿立方米。上游大别山是古老岩系组成的山体,属淮阳古陆。由于河流割切剧烈,造成山势陡峻、峰峦重叠的地貌景观。岩系多半为前震旦纪的变质岩和岩浆岩。中游丘陵岗地,
Anhui is a tributary of the lower reaches of the Yangtze River, located between Anhui Jianghuai, the source of the western Anhui Dabie Mountains, flowing through the four counties in the Anqing City into the Yangtze River. The entire 188 km, the average river down 2.5 ‰, the upper reaches of the Yangtze River, diving, three tributaries of Anhui. Valley topography from northwest to southeast tilt. The total area of 6442 square kilometers, 23338000 acres of arable land, paddy fields accounted for 90%, population 1.73 million, many years of average flow of 4.86 billion cubic meters. The upper reaches of the Dabie Mountains is a mountain of ancient rock series, is a Huaiyang ancient land. Due to the severe river cut, resulting in steep mountains, overlapping peaks and landscapes. Most of the rock series are metamorphic rocks and magmatic rocks of Pre-Sinian. Middle hill hilly,