川江风簸碛滩河床演变及航道整治

对川江风簸碛滩河床演变特性及碍航原因进行了分析,针对风簸碛滩弯曲,分汊,左槽过于弯曲、右槽枯水水浅的特点,确定了削弱左槽,开辟顺直右槽为枯水航槽的治理措施。通过疏浚扩大航道尺度,布置整治建筑物控制河势,增大右槽枯水流量,以保持挖槽稳定。整治后,经一个水文年的水沙作用,碛头坝束流和导流的作用明显,右槽3m等深线贯通,上、下浅区均满足了航道尺度要求,航槽基本稳定。

Channel bed variation and water way regulation of Fengboqi Shoal in the Sichuan Section of the Yangtze River

In terms of the character of width,braid and bend of the Fengboqi shoal reach in the Chuanjiang River,authors analyzed the characteristic of the channel bed variation and the causes of navigation obstruction.Regulation projects have been taken to weaken the left bend channel and strengthen the shallow right channel as the low water-level navigation channel.Dredging was used to widen the channel,and regulating constructions were used to control river regime.Through these measurments,a stable right channel with bigger scale and flow discharge in the low water-level period was reached.Observation data show that the cross dam and guide wall in the front of the shoal is good for diversion,3m bathymetric line in the right channel went through after one year of regulation.