長江口洪季水動力對海平面上升的響應(yīng)特征
[Abstract]:Considering the serious threat posed by sea level rise to the hydrodynamics of the Changjiang Estuary, a two-dimensional hydrodynamic mathematical model of the Changjiang Estuary is established based on MIKE21 software. The model is verified by the measured tidal level, velocity and flow direction data. Based on the summary of relevant literature and IPCC report, it is concluded that sea level rise is about 0.5 m conservatively in 2100. The hydrodynamics of the Yangtze Estuary flood season after sea level rise of 0.5 m are numerically simulated by using the verified mathematical model. The calculated results show that after sea level rise, the time of rising tide increases and the time of falling tide shortens, and after the rise of 0.5 m sea level, the high tide level increases by 0.43 m / 0.46 m in the north and south branches of the Yangtze River Estuary, the north and south ports and the north and south trenches, and the increase of high tide level decreases upward along the course. After sea level rise of 0.5 m, the increase of velocity in the north branch is larger than that in the south branch, and the increase of tidal current in the upper section of the northern branch is 82.8, which is beneficial to the development of the northern branch waterway. Overall, sea level rise poses a threat to the current standards along the Yangtze Estuary, but is beneficial to the declining northern branch waterways.
【作者單位】: 浙江海洋大學海運與港航建筑工程學院;同濟大學土木工程學院;上海海洋大學海洋科學學院;浙江工業(yè)大學建筑工程學院;海軍91991部隊;
【基金】:國家“九七三”重點基礎(chǔ)研究發(fā)展計劃(2012CB95 7704) 浙江海洋大學科研啟動經(jīng)費(1987)~~
【分類號】:P731.2
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