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通过连续4年对黄河内蒙古段河道28条大断面进行测量,提取测次间河岸蚀淤量,分析了2011-2014年间汛期和非汛期黄河内蒙古段河岸蚀退与淤进速率频率分布特征,以及河岸蚀退和淤进与水沙因子的关系。结果显示侵蚀性岸段占64%,平均蚀退速率0.147m/d;淤积性岸段占31%,平均淤进速率0.335m/d。不论蚀退还是淤进的速率频率分布都表现为明显的正偏,其对数值都呈现为正态分布。河岸蚀淤量统计结果显示河槽缩窄趋势近期已减缓。河岸蚀退速率与淤进速率都与流量成正相关,分析揭示河岸蚀退速率及淤进速率与水沙因子的关系主要是河岸蚀淤响应洪枯期流量变化而调整的结果。
By measuring 28 major sections of the Yellow River Inner Mongolia section for four consecutive years, the eroded and eroded sediments of the estuary between the measuring stations were extracted. The frequency distribution characteristics of the ebb and flow rate of the inland sections of the Inner Mongolia section of the Yellow River in flood season and non-flood season in 2011-2014 were analyzed. Relationship between river bank erode and siltation and water and sediment factors. The results show that the eroded shore section accounts for 64% and the average eroded rate is 0.147m / d. The silting shore section accounts for 31% and the average sedimentation rate is 0.335m / d. The frequency distributions of eroded or silted showed a significant positive bias, and the logarithmic values showed a normal distribution. Erosion and silting statistics show that river trough narrowing trend has slowed recently. The relationship between river bank erosion rate and siltation rate is positively correlated with the flow rate. The analysis reveals that the relationship between river bank eroded rate and sedimentation rate and water and sediment factor is mainly due to the adjustment of river bank erosion and siltation in response to the change of flood season flux.