淮河中游蚌埠闸至老子山段断面法冲淤变化分析

Analysis on Erosion and Deposition of the Middel Reach of Huihe River from Bengbuzha to Laozishan by Using Sectional Method

根据河道实测资料,采用断面法分析淮河中游蚌埠闸至老子山段冲淤变化情况。结果表明,蚌埠闸至洪山头间的河道段,主槽在1971年—2001年间均呈冲刷状态,其中1983年—1992年间冲刷幅度最大,造成主槽冲刷下切的原因有自然冲刷和人工采砂两个因素。滩地在1971年—1992年间呈淤积状态,1992年—2001年间趋于稳定;洪山头至老子山间的入湖河口段,主槽和滩地在1992年—2001年间均呈淤积状态。

Based on the observed data, the erosion and deposition situation of the middle reach of Huaihe River from Bengbuzha to Laozishan is analyzed by using sectional method. It is shown that the bed of the river-channel reach from Bengbuzha to Hongshantou was in erosion condition from 1971 to 2001 and the erosion degree was the most acute between 1983 to 1992. Natural erosion and anthropogenic mining sand are the two reasons causing the river bed eroded. The flood plain of the river-channel reach from Bengbuzha to Hongshantou was in deposition condition from 1971 to 1992 and in balance condition from 1992 to 2001. The river bed and flood plain of the estuary reach from Hongshantou to Laozishan were all in deposition condition from 1992 to 2001.