周天河段航道整治工程对荆江右岸堤防的影响

为了解周天河段航道整治工程对荆江右岸堤防的影响,根据对杨家厂—古长堤的河床演变分析,在郝穴原有矶头群及航道整治工程的5道潜坝和护滩带的综合作用下,河道深泓线将进一步向右岸逼近并加剧对右岸近岸河床的纵向下切和侧向侵蚀及沿程冲刷,护滩带的构筑将抬高蛟子渊边滩,从而加剧对荆江右岸护岸工程的冲刷,宜加强戚家台—胡汾沟一带的防护措施,并加强对相关河段近岸河床的常年监测。

Effect of Waterway Regulation Engineering in Zhoutian River Reach on Jingjiang Right Dike

In order to find out the effect of the waterway regulation engineering in Zhoutian river reach on Jingjiang right dike,and according to the analysis for the riverbed evolvement from Yangjiachang to Guchangdi,it is found that in Haoxue river reach under the integrated influence of the original rock spur group and waterway regulation engineering of five submerged dams and beach protection band,the thalweg would move toward the right dike,longitudinally cut the riverbed near the dike,laterally erode the dike,and wash the river along.It is also found that the construction of beach protection band would raise the tidal flat of Jiaozi Lake,hence increasingly wash the revetment engineering of the right dike.It is suitable to strengthen the protection engineering from Qijiatai to Hufengou as well as monitor the riverbed near the dike all the year round.