本文選題：龍門(mén)水道 + 河床演變　； 參考：《水運(yùn)工程》2017年03期

【摘要】：龍門(mén)水道為長(zhǎng)江上游重點(diǎn)礙航河段,兼具淺險(xiǎn)灘和急流灘的特點(diǎn)。采取實(shí)測(cè)資料研究該河段近期水沙特性,以及岸線、深泓和典型斷面等變化,分析龍門(mén)水道礙航原因。結(jié)果表明,龍門(mén)水道平面形態(tài)穩(wěn)定,岸線和深槽位置變化很小,年際間沖淤交替。在上游水庫(kù)蓄水等的影響下,來(lái)沙量減少,枯水河槽小幅沖刷。彎道段洪、枯河寬差距較大,汛期易在凸岸形成礙航淺灘;中、枯水流量下,大河村丁順壩束水形成急流灘,彎頂右岸石梁頭部的復(fù)雜流態(tài)與左岸漫灘斜流綜合作用形成險(xiǎn)灘。
[Abstract]:Longmen waterway is an important channel in the upper reaches of the Yangtze River, which is characterized by shallow banks and rapids. The recent characteristics of water and sediment, as well as the changes of shoreline, deep channel and typical section in the reach of the river are studied by using the measured data, and the reasons for the obstruction of navigation in the Longmen waterway are analyzed. The results show that the plane shape of Longmen waterway is stable, the change of shoreline and deep channel position is very small, and the interannual erosion and deposition alternates. Under the influence of upstream reservoir water storage, the amount of incoming sediment is reduced, and the low water channel is scoured slightly. In the bend section of flood, the wide gap between the dry river and the river is large, the shallow beach is easily formed on the convex bank in flood season, and under the low water flow, the water of Dingshun dam in Dahe village forms a jet beach, and the complex flow pattern of the head of the stone beam on the right bank of the bend top and the oblique flow of the left bank flood bank form a dangerous beach.
【作者單位】： 交通運(yùn)輸部天津水運(yùn)工程科學(xué)研究院;
【分類號(hào)】：U617;TV147

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本文編號(hào)：1917902