近10年围垦工程对杭州湾潮波动力过程的影响研究
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摘要
杭州湾近10年的围垦工程使其岸线向海推进,导致内部潮波动力发生较大变化。本文基于验证后的非结构化网格的长江口-杭州湾-舟山群岛近海潮波动力数值模型,结合Landsat遥感数据,分析了杭州湾近10年的岸线变化,并计算了2005年和2015年两种工况下杭州湾的潮波动力情况。对比发现,2005-2015年之间的围垦工程造成湾内高潮位抬升0.2~0.5 m,南岸庵东浅滩附近潮流减小,湾顶附近余流增幅明显。
The continuous reclamations on Hangzhou Bay(HZB) moved its coastal line forward into the sea, which lead to the changes of tidal dynamics. Base on the unstructured, high bathymetry resolution hydrodynamic model, and Landsat remote sensing data, the article analyze the evolution of its coastline.Then two different scenarios were simulated to hindcast HZB tidal dynamics in 2005 and 2015. The comparisons of results show the reclamation lead to the spring high tide increase about 0.2~0.5m in the middle portion of HZB and its spring current decrease near the Andong tidal flat. The residual current increase a lot near the upper limit of HZB.
The continuous reclamations on Hangzhou Bay(HZB) moved its coastal line forward into the sea, which lead to the changes of tidal dynamics. Base on the unstructured, high bathymetry resolution hydrodynamic model, and Landsat remote sensing data, the article analyze the evolution of its coastline.Then two different scenarios were simulated to hindcast HZB tidal dynamics in 2005 and 2015. The comparisons of results show the reclamation lead to the spring high tide increase about 0.2~0.5m in the middle portion of HZB and its spring current decrease near the Andong tidal flat. The residual current increase a lot near the upper limit of HZB.
引文
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[2]熊伟等.宁波舟山近海三维潮汐潮流数值模拟.水道港口,2011,06:399-407.
[3]鲁友鹏,等.杭州湾南岸岸线变化对水动力的影响累积效应.海洋环境科学,2015,03:384-390.
[4]曹德明,方国洪.杭州湾和钱塘江潮波的联合数值模型.海洋学报(中文版)5,1988:000
[5]Chen Changsheng,Robert C Beardsley,Geoffrey Cowles.An unstructured grid,finite-volume coastal ocean model:FVCOM user manual.SMAST/UMASSD,2006.
[6]倪勇强,耿兆铨,杭州湾水动力特性研讨.水动力学研究与进展,2003,18(4):439-445.
[7]Ma Gangfeng,et al.Hydrodynamic modeling of Changjiang Estuary:Model skill assessment and large-scale structure impacts Applied Ocean Research,2011,33.1:69-78.
[8]姚炎明,朱斌,李佳.钱塘江河口水体冲洗时间的计算.浙江大学学报:理学版,2012,39(6).
[9]Kuang C P,et al.Impact of large-scale reclamation on hydrodynamics and flushing in Victoria Harbour,Hong Kong Journal of coastal research,2013,29.6a:128-143.
[10]李身铎,孙卫阳.杭州湾潮致余流数值研究.海洋与湖沼,1995,3:254-261.