中文摘要：

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。

英文摘要：

Geometric surveys were finished on 28 channel cross sections of the Yellow River in the Inner Mongolia in the period of 2011- 2014. The rate of bank erosion / deposition in the intervals of two consecutive surveys was calculated using the channel geometric measurement. The distributions of bank erosion / deposition rates were investigated and the average bank erosion / deposition rates were related with the mean water discharge and sediment concentration. Results show that the eroded banks account for 64% with an average bank erosion rate of 0. 147 m / d,and bank deposition occurs with a percentage of 31% and an average rate of0. 335 m / d. Both the bank erosion and deposition rates have a noticeable positively skewed frequency distribution,and their logarithmic values have a normal distribution. The statistic results of bank erosion / deposition suggest that the channel narrowing trend after the closure of upstream large dams has nearly disappeared. Both the bank erosion and deposition rates are positively related with the mean water discharge. The relations of bank erosion / deposition rates with the water and sediment factors constructed for the river reaches under discussion reflect the response of bank erosion / deposition to changes in water discharge in flood and low flow seasons.