本文選題：土橋水道 + 礙航特性��； 參考：《水運(yùn)工程》2017年02期

【摘要】：長江下游土橋水道自1998年開始航道條件惡化,但不同時(shí)期礙航特性不同。以1955—2014年土橋水道的實(shí)測地形、水文資料及大通站水沙資料為基礎(chǔ),用有序聚類法分析了大通站輸沙量的變化特點(diǎn),以及各類礙航特性變化的原因。結(jié)果表明:目前土橋水道礙航特性已從斷面形態(tài)寬淺及淤沙礙航變?yōu)樽筱夥至鞅认陆?其主要原因是三峽蓄水后大通站水沙過程的變化。該水沙過程不利于左汊分流比的維持,特別是175 m蓄水方案運(yùn)行后,左汊分流比明顯下降,成為影響航道條件的主要因素。
[Abstract]:The channel conditions of the earth bridge in the lower reaches of the Yangtze River have deteriorated since 1998, but the characteristics of hindrance are different in different periods. Based on the measured topography, hydrological data and water and sediment data of Tuqiao waterway from 1955 to 2014, the variation characteristics of sediment transport in Datong station and the reasons for the change of various characteristics of hindrance to navigation are analyzed by using the ordered clustering method. The results show that the characteristics of the earth bridge waterway have changed from broad and shallow section shape and silt to left branch diversion ratio, which is mainly due to the change of water and sediment process in Datong station after the three Gorges impoundment. The process of water and sediment is not conducive to the maintenance of the distribution ratio of the left branch, especially after the operation of the 175m storage scheme, the distribution ratio of the left branch decreases obviously, which becomes the main factor affecting the waterway condition.
【作者單位】： 武漢大學(xué)水資源與水電工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室;長江航道規(guī)劃設(shè)計(jì)研究院;長江航道測量中心;
【基金】：中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2042016kf1068)
【分類號(hào)】：U617

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本文編號(hào)：2065178