發(fā)布時間：2018-03-17 01:02

  本文選題：長江口深水航道　切入點：驟淤　出處：《河海大學學報(自然科學版)》2017年05期 　論文類型：期刊論文

【摘要】：為歸納長江口深水航道臺風期驟淤的發(fā)生規(guī)律及特征,分析了發(fā)生驟淤時刻的氣象條件與對應的波浪條件。研究發(fā)現(xiàn),牛皮礁站的波能與驟淤具有較好的相關性;從臺風路徑上分析,長江口東側過境臺風對航道的驟淤影響顯著。結合歷史臺風路徑,選取3個典型路徑的臺風,選擇藤田-高橋圓形經驗風場和CFSR(climate forecast system reanalysis)風場的混合風場復演了臺風場,然后采用SWAN模型模擬了不同路徑臺風期間的波況,最后以牛皮礁站的淺水波能流為判別參數,分析不同路徑臺風對長江口深水航道驟淤的影響。研究表明長江口東側過境的臺風是較易產生較大波能并進一步誘發(fā)驟淤的典型臺風路徑,這一分析結果與2010年以來的驟淤實測臺風路徑結果吻合。
[Abstract]:In order to sum up the occurrence regularity and characteristics of sudden siltation in Yangtze Estuary deepwater channel during typhoon period, the meteorological conditions and the corresponding wave conditions at the time of sudden siltation are analyzed. It is found that the wave energy of the Niupi reef station has a good correlation with the sudden siltation. From the analysis of typhoon path, the influence of transit typhoon on channel siltation is significant in the east side of Changjiang Estuary. Combined with historical typhoon track, three typical typhoon paths are selected. The mixed wind field of Fujida Gaoqiao circular wind field and CFSR(climate forecast system analysis field is selected to reproduce the typhoon field. Then the wave conditions during typhoon with different paths are simulated by SWAN model. Finally, the shallow water wave energy flow of Niupi reef station is taken as the discriminating parameter. The influence of different typhoon paths on sudden siltation in the Yangtze Estuary deepwater channel is analyzed. The results show that the typhoon passing through the east side of the Changjiang Estuary is a typical typhoon path which can easily produce large wave energy and further induce sudden siltation. The results of this analysis are in agreement with the measured track of sudden silt typhoon since 2010.
【作者單位】： 上海河口海岸科學研究中心;上海交通大學水動力學教育部重點實驗室;南京水利科學研究院河流海岸研究所;
【基金】：國家自然科學基金青年基金(41206072) 2016年港口航道泥沙交通行業(yè)重點實驗室開放基金(Yn216001)
【分類號】：TV148;U616

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