为了及时了解冲刷强度及冲刷范围,多年来对汉江中游河道进行多次观测,经资料整理及数据分析,总结出冲刷规律,以往分析至2005年。根据2005和2012年丹江口水库坝下游断面测量资料,对丹江至碾盘山河河段冲刷规律进行浅析,得出坝下游河段冲刷强度随时间及距坝里程的不同而发生变化。随着时间的推移,重点冲刷河段由丹江口至襄阳向下游发展,且近期重点冲刷段在崔家营至碾盘山河段。丹江口大坝加高调度方式发生变化后,建议加强对丹江口大坝下流河段冲刷的监测与分析工作。

To understand the scouring intensity and scope in the middle Hanjiang River, we summarized the erosion regularity up to 2005 through years of observation. In this research, regularities of recent scouring in the reach from Danjiangkou to Nianpanshan are analysed according to observation data in the downstream of Danjiangkou dam from 2005 to 2012.It’s concluded that the erosion intensity in the downstream of dam varies with the scouring time and the distance to dam. With time goes by, major erosion develops from Danjiangkou-Xiangyang reach towords the downstream. In recent years the river reach from Cuijiaying to Nianpanshan was subjected to major scouring. Due to the changes in operation mode caused by the heightening of Danjiangkou dam, it is suggested to strengthen the monitoring and analysis on the erosion in the downstream of Danjingkou dam.