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从黄河下游地图上可以看出,黄河自西向东而来,在河南省兰考县北面发生剧烈转折,拐向东北直趋渤海。这一河势的突变是怎样产生的呢? 130年前的黄河河道,是自今兰考向东南延伸,经河南的商丘,山东的曹县、单县,安徽的砀山,江苏的徐州、宿迁等地至清江市与淮河汇合后注入黄海。这条河道自明代万历年间基本固定后直至清代后期,约有200多年的历史。由于泥沙大量淤积形成了悬河,有的地方竟高出地面10米以上,岌岌可危。由于河政腐
As can be seen from the map of the lower reaches of the Yellow River, the Yellow River has come from west to east, turning violently into the north of Lankao County in Henan Province and heading straight to the northeast to the Bohai Sea. The sudden change of this river regime occurred. 130 years ago, the Yellow River was extended from southeast to the south by Shangkao, Shangqiu in Henan Province, Cao County in Shandong Province, Shanxian County in Anhui Province, Dangshan in Anhui Province, Xuzhou in Jiangsu Province and Suqian in other places Qingjiang City and the confluence of the Huaihe into the Yellow Sea. This river since the Ming Dynasty Wanli years basically fixed until the late Qing Dynasty, about 200 years of history. Due to sediment deposition caused by a large number of hanging river, some places actually above 10 meters above the ground, precarious. Due to the river corruption