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Effects of cluster land reclamation projects on storm surge inJiaojiang Estuary,China

Water Science and Engineering 2017年第1期10卷 59-69页

作者： Zhi-lin Sun Sen-jun Huang Jian-ge Jiao Hui Nie Mei Lu Ocean College Zhejiang UniversityHangzhou 310058China Science and Technology Department Zhejiang University of Water Resources and Electric PowerHangzhou 310018China Zhejiang Province Ocean and Fisheries Bureau Hangzhou 310007China

variations in coastline geometry caused by coastal engineering affect tides, storm surges, and storm tides. Three cluster land reclamation projects have been planned for construction in the Jiaojiang Estuary during the period from 2011 to 2023. They will cause significant changes in coastline geometry. In this study, a surge-tide coupled model was established based on a three-dimensional finite-volume coastal ocean model （FVCOM）. A series of numerical experiments were carried out to investigate the effects of variations in coastline geometry on tides, storm surges, and storm tides. This model was calibrated using data observed at the Haimen and Ruian gauge stations and then used to reproduce the tides, storm surges, and storm tides in the Jiaojiang Estuary caused by Typhoon Winnie in 1997. Results show that the high tide level, peak storm surge, and high storm tide level at the Haimen Gauge Station increased along with the completion of reclamation projects, and the maximum increments caused by the third project were 0.13 m, 0.50 m, and 0.43 m, respectively. The envelopes with maximum storm tide levels of 7.0 m and 8.0 m inside the river mouth appeared to move seaward, with the latter shifting 1.8 km, 3.3 km, and 4.4 km due to the first project, second project, and third project, respectively. The results achieved in this study contribute to reducing the effects of, and preventing storm disasters after the land reclamation in the Jiaojiang Estuary.

关键词： Cluster land reclamation coastline geometry variation Storm surge Jiaojiang Estuary Typhoon Winnie

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