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针对丹江口水库建成后对汉江中游仙人渡河段河势的影响,基于历年实测资料,分析了汉江中游仙人渡河段的演变规律,进而探讨了河道演变趋势。结果表明,20世纪70年代以来,仙人渡河段深泓平面位置总体基本稳定,仅在不管洲汊道段发生主支汊易位,1977~1987年深泓位于不管洲汊道段的中汊,1987年以后深泓摆至右汊并保持稳定;河段深泓平均冲刷深度从1977~1987年的0.93m,减少至1987~2005年的0.35m以及2005~2012年的0.32m;河段高滩部分变化不大,但低滩部分冲淤较为剧烈,主要表现为郭家岗附近河岸崩塌、河道展宽导致江心滩的形成并发育,1977~2005年不管洲汊道段主支汊易位后的支汊淤积和主汊冲刷以及2005~2012年连续几场大洪水导致不管洲中汊的冲刷。据此推断,未来不管洲汊道段中汊发展成为主汊的可能性很小,河段深泓平面位置仍将维持现状,河势总体保持稳定,河段深泓平均冲刷强度均不会超过2005~2012年的均值(0.04m/年)。
Aiming at the influence of Danjiangkou Reservoir on the river regime of Xianrendu reach in the middle reaches of Hanjiang River, the evolvement law of Xianrendu reach in the middle reach of Hanjiang River was analyzed based on the measured data over the years, and then the trend of river evolution was discussed. The results show that since the 1970s, the depth of the plane of the Xianrendu reach has basically been basically stable, with only the main branch dislocation occurring at the section of Chaucheng. From 1977 to 1987, Shenhong was located in Zhongli, After that, the average depth of erosion in the reach of the river reach was reduced from 0.93 m in 1977-1987 to 0.35 m in 1987-2005 and 0.32 m in 2005-2012. However, the scouring and silting in the part of low bank is more severe, which is mainly caused by the bank collapse near Guojiagang River and the widening of the riverway leading to the formation and development of Jiangxintan. From 1977 to 2005, The erosion of the main 汊 and several major floods in 2005 ~ 2012 led to the erosion of the Central Plains. Based on this, we can conclude that in the future, it is not likely that the development of Zhongli in Main Section of Chau-Uygur Autonomous Region will be the main one. The location of the deep section of the river will remain as it is and the overall river regime will remain stable. Mean (0.04m / year).