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对鹅头分汊河段进行了分析.鹅头分汊河段多汊并存,洲滩易变,航道条件较差.三峡工程蓄水前后,长江中下游鹅头分汊河道一般都实施了航道整治工程,整治原则以稳定洲滩、保持分汊为主.但由于鹅头分汊河段均处于周期性调整过程中,对于不同演变阶段,河段碍航特性存在差异,工程治理重点和效果也不同.演变初期的汊道,周期性调整动力较强,洲滩演变剧烈,整治思路以稳定分流格局为主,但整治工程往往不能立刻发挥效果,需要反复强化;处于演变中期和末期的汊道,整治工程更着重局部航道条件的改善,一般治理效果较好,但仍需重视河段周期性调整动力及三峡工程蓄水后河段河床冲淤特性,加强观测,及时采取措施,巩固工程效果.
The goose head sub-river sections were analyzed. Goose head sub-river sections coexist, Chauten volatile, poor waterway conditions before and after the Three Gorges Project impoundment, the middle and lower reaches of the Yangtze River goose head sub-channel generally have implemented the waterway Remediation works and remediation principles are mainly to stabilize the beach and maintain the subdivision, but due to the periodic adjustment of goose head sections, there are differences in the obstructing characteristics of river sections in different stages of evolution and the key points and effects of project management Are also different.Changes in the early evolution, strong cyclical adjustment, the dramatic evolution of continental beach, regulation of the road to stabilize the distribution pattern, but the renovation project often can not immediately play an effect, you need to repeatedly strengthen; in the evolution of the mid and late Roads, remediation projects pay more attention to the improvement of local navigation conditions, the general control effect is better, but still need to pay attention to the periodic adjustment of river power and the Three Gorges Reservoir impoundment after the scouring characteristics of the riverbed to strengthen the observation, timely measures to consolidate the project effect.