長江下游新生洲洲頭分流段演變特征及洲頭守護措施
發(fā)布時間：2019-01-15 22:24
【摘要】：洲頭分流段的河床演變對河勢控制與穩(wěn)定起著承上啟下的關(guān)鍵作用,歷來受到工程界的廣泛關(guān)注。長江新生洲洲頭分流段處于蘇皖交界,是長江南京河段的門戶。通過分析歷史及近年上游小黃洲汊道、下游新生洲汊道及新生洲洲頭分流段的河床演變特征,揭示了上下兩個汊道分流比變化及洲頭沖淤、汊道興衰的內(nèi)在關(guān)聯(lián)性,論證了洲頭控制對汊道水動力變化及主支汊演變的重要性,指出在三峽水庫新運行的水沙條件、河勢變化及汊道河勢穩(wěn)定性要求下,守護新生洲洲頭的治理措施應(yīng)以恢復(fù)近年洲頭沖刷后退前的灘勢為原則,修建長度、方向、高程合理的洲頭導(dǎo)流壩,并輔以護底及洲頭兩緣的護岸工程,以及對小黃洲洲尾右側(cè)至洲尾灘脊進行局部疏浚。成果可為該河段的全面系統(tǒng)治理提供有益參考。
[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.
【作者單位】： 南京水利科學(xué)研究院;河海大學(xué);
【分類號】：TV147
本文編號：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.
【作者單位】： 南京水利科學(xué)研究院;河海大學(xué);
【分類號】：TV147
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相關(guān)期刊論文 前1條
1 包中校;長江新濟洲河段的演變及整治設(shè)想[J];水利水電技術(shù);1995年12期
，本文編號：2409171
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