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(一) 总述淮河中游淮北地区的范围为洪河以下,洪泽湖以上,除颍河以外的各支流流域。这些支流为安河,濉河,漴潼河,北淝河,渦河,芡河,泥河,黑河,架河,西淝河,八里河,润河,谷河等几十条河流,面积约有53,000平方公里。这个地区除濉河中游很小部分为丘陵区外,其余均属平原,地形西北高、东南低,坡降从1/5,000
(I) General The area of Huaibei area in the middle reaches of the Huaihe River is below the Honghe River, above Hongze Lake, and the tributary basins except Ying River. These tributaries are dozens of rivers such as the Anhe River, the Bahe River, the Tintong River, the Beibei River, the Edo River, the Bahe River, the Nihe River, the Heihe River, the Jiahe River, the Xibei River, the Bali River, the Yunhe River and the Guhe River, 53,000 square kilometers. Except for a small part of the middle reaches of the Bahe River, the rest of the area is plains. The terrain is high in the northwest and low in the southeast. The slope gradient is from 1 / 5,000