长江下游新生洲洲头分流段演变特征及洲头守护措施
发布时间：2019-01-15 22:24
【摘要】：洲头分流段的河床演变对河势控制与稳定起着承上启下的关键作用,历来受到工程界的广泛关注。长江新生洲洲头分流段处于苏皖交界,是长江南京河段的门户。通过分析历史及近年上游小黄洲汊道、下游新生洲汊道及新生洲洲头分流段的河床演变特征,揭示了上下两个汊道分流比变化及洲头冲淤、汊道兴衰的内在关联性,论证了洲头控制对汊道水动力变化及主支汊演变的重要性,指出在三峡水库新运行的水沙条件、河势变化及汊道河势稳定性要求下,守护新生洲洲头的治理措施应以恢复近年洲头冲刷后退前的滩势为原则,修建长度、方向、高程合理的洲头导流坝,并辅以护底及洲头两缘的护岸工程,以及对小黄洲洲尾右侧至洲尾滩脊进行局部疏浚。成果可为该河段的全面系统治理提供有益参考。
[Abstract]:The evolution of riverbed in Zhoutou distributary section plays a key role in river regime control and stability, and has always been widely concerned by engineering circles. At the junction of Jiangsu and Anhui, the shunt section of Xinzhouchaoutou is the gateway of the Nanjing reach of the Yangtze River. Based on the analysis of the river bed evolution characteristics of the upstream Xiaohuang River branch, the downstream Xinzhou branch and the Xinzhou head distributary section, the paper reveals the inherent relationship between the upper and lower branches, the variation of the distribution ratio between the upper and lower branches, and the erosion and siltation at the head of the river, and the rise and fall of the inlet. The importance of Zhoutou control to the hydrodynamic change of the inlet and the evolution of the main branch is demonstrated. It is pointed out that under the new operating conditions of the three Gorges Reservoir, the variation of the river regime and the stability of the river regime of the branch channel are required. The control measures for guarding the head of the Sun Chau should be based on the restoration of the beach trend before the erosion of the head of the island in recent years, the construction of a diversion dam with a reasonable length, direction and elevation, supported by a revetment project at the bottom and the edge of the head of the island. And local dredging of the ridge from the right side of the tail of Little Wong Chau Island to the beach at the end of Chau Island. The results can provide a useful reference for the comprehensive and systematic management of the reach.
【作者单位】： 南京水利科学研究院;河海大学;
【分类号】：TV147
本文编号：2409171
[Abstract]:The evolution of riverbed in Zhoutou distributary section plays a key role in river regime control and stability, and has always been widely concerned by engineering circles. At the junction of Jiangsu and Anhui, the shunt section of Xinzhouchaoutou is the gateway of the Nanjing reach of the Yangtze River. Based on the analysis of the river bed evolution characteristics of the upstream Xiaohuang River branch, the downstream Xinzhou branch and the Xinzhou head distributary section, the paper reveals the inherent relationship between the upper and lower branches, the variation of the distribution ratio between the upper and lower branches, and the erosion and siltation at the head of the river, and the rise and fall of the inlet. The importance of Zhoutou control to the hydrodynamic change of the inlet and the evolution of the main branch is demonstrated. It is pointed out that under the new operating conditions of the three Gorges Reservoir, the variation of the river regime and the stability of the river regime of the branch channel are required. The control measures for guarding the head of the Sun Chau should be based on the restoration of the beach trend before the erosion of the head of the island in recent years, the construction of a diversion dam with a reasonable length, direction and elevation, supported by a revetment project at the bottom and the edge of the head of the island. And local dredging of the ridge from the right side of the tail of Little Wong Chau Island to the beach at the end of Chau Island. The results can provide a useful reference for the comprehensive and systematic management of the reach.
【作者单位】： 南京水利科学研究院;河海大学;
【分类号】：TV147
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1 包中校;长江新济洲河段的演变及整治设想[J];水利水电技术;1995年12期
，本文编号：2409171
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