影响长江口深水航道骤淤的非常态天气过程Ⅰ:台风的路径特征及数值验证

发布时间：2018-03-17 01:02

本文选题：长江口深水航道　切入点：骤淤　出处：《河海大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：为归纳长江口深水航道台风期骤淤的发生规律及特征,分析了发生骤淤时刻的气象条件与对应的波浪条件。研究发现,牛皮礁站的波能与骤淤具有较好的相关性;从台风路径上分析,长江口东侧过境台风对航道的骤淤影响显著。结合历史台风路径,选取3个典型路径的台风,选择藤田-高桥圆形经验风场和CFSR(climate forecast system reanalysis)风场的混合风场复演了台风场,然后采用SWAN模型模拟了不同路径台风期间的波况,最后以牛皮礁站的浅水波能流为判别参数,分析不同路径台风对长江口深水航道骤淤的影响。研究表明长江口东侧过境的台风是较易产生较大波能并进一步诱发骤淤的典型台风路径,这一分析结果与2010年以来的骤淤实测台风路径结果吻合。
[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.
【作者单位】：上海河口海岸科学研究中心;上海交通大学水动力学教育部重点实验室;南京水利科学研究院河流海岸研究所;
【基金】：国家自然科学基金青年基金(41206072) 2016年港口航道泥沙交通行业重点实验室开放基金(Yn216001)
【分类号】：TV148;U616

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