本文選題：河床演變 + 礙航特性　； 參考：《水運(yùn)工程》2017年09期

【摘要】：依據(jù)河道實(shí)測(cè)水文、地形資料對(duì)長江下游黑沙洲水道河床演變和礙航特性進(jìn)行深入分析,初步提出該河段的航道整治思路。分析表明:大水年尤其是特大洪水年,河床沖淤變化相對(duì)較大,南水道過渡段左槽沖刷、右槽中下段淤積現(xiàn)象明顯。主要原因是洪水期南水道過渡段漫灘水流增強(qiáng),左槽分流沿程增加、右槽分流沿程減小,江中心灘束流作用有限,處于緩流區(qū)的右槽下段輸沙能力不足,汛后沖刷不充分。航道整治的基本思路為穩(wěn)定相對(duì)有利的灘槽格局,攔截漫灘水流、限制左槽的進(jìn)一步?jīng)_刷發(fā)展、增強(qiáng)南水道右槽水流的沖刷能力。
[Abstract]:Based on the measured hydrological and topographic data of the river channel, the evolution of the riverbed and the characteristics of hindering navigation of the Heishazhou watercourse in the lower reaches of the Yangtze River are analyzed in depth, and the channel regulation ideas of the reach are put forward preliminarily. The analysis shows that the river bed scour and silt change is relatively large in the flood year, especially in the flood year, and the left channel scour and the middle and lower section of the right channel are obviously deposited in the transitional section of the southern waterway. The main reasons are that the floodplain flow increases, the left channel distributary increases, the right channel distributary decreases during the flood period, the beam effect of the river center beach is limited, the sediment transport capacity of the lower right trough section in the slow flow area is insufficient, and the scour after flood is not sufficient. The basic idea of channel regulation is to stabilize the favorable channel pattern, to intercept the floodplain flow, to limit the further development of the left channel, and to enhance the scour ability of the right channel in the south channel.
【作者單位】： 南京水利科學(xué)研究院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51579151;51679147)
【分類號(hào)】：TV147;U617

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本文編號(hào)：1987365