Journal of Tropical Oceanography >
Analysis on temporal change of foreshore profile under tropical storms
Received date: 2008-12-22
Revised date: 2009-04-08
Online published: 2009-12-12
Supported by
国家自然科学基金项目（40576041）
Using the hourly data at six fixed sites (Pegs 1-6) for foreshore profile during Typhoon Prapiroon (Typhoon No. 0606) and severe tropical storm Bopha (No. 0609) from August 2-16, 2006, the authors analyze the characteristics of temporal changes in beach elevation based on one-dimensional optimal wavelet packet transform. The results are as follows. (1) The temporal change is dominated by 2-5 day period for Pegs 1 and 2 at the upside of the profile, reflecting the recovery process of the profile before and after the storms.(2) The heights of the four pegs at the mid-lower portion of the profile, with a periodical variation of 2-4 hours, showed a short-term erosion caused by storms, which resulted in a quick adjustment of the profile topography and the influence of diurnal tidal fluctuation on the beach front heights. (3) The temporal points with abrupt change in high-frequency scale of the pegs reflected the mutability of the profile topography under the influences of storm surge set-up and advance-and-retreat of sand bars in the surf zone.(4) The topography changes in low-frequency scale at the pegs indicated a trend towards stable accumulation and recovery of the profile topography after the storms.
CHEN Zi-shen , WANG Yang-sheng , HUANG De-quan , LIU Meng-wei . Analysis on temporal change of foreshore profile under tropical storms[J]. Journal of Tropical Oceanography, 2009 , 28(6) : 1 -6 . DOI: 10.11978/j.issn.1009-5470.2009.06.001
[1] FORBESA D L, PARKESB G S, MANSONA G K, et al. Storms and shoreline retreat in the southern Gulf of St. Lawrence[J]. Marine Geology,2004,210:169—204
[2] DAIL H J, MERRIFIELD M A, BEVIS M. Steep beach morphology changes due to energetic wave forcing[J]. Marine Geology,2000,162:443—458.
[3]. HILL H W, KELLEYB J T, BELKNAPB D F, et al. The effects of storms and storm-generated currents on sand beaches in Southern Maine, USA[J]. Marine Geology,2004, 210:149—168.
[4] STONE G W, LIU BAOZHU, PEPPER D A, et al. The importance of extratropical and tropical cyclones on the short-term evolution of barrier islands along the northern Gulf of Mexico, USA[J]. Marine Geology, 2004, 210: 63—78.
[5] 蔡锋,苏贤泽,杨顺良,等. 厦门岛海滩剖面对9914 号台风大浪波动力的快速响应[J]. 海洋工程,2002,20(2):85—90.
[6] 王文海,吴桑云,陈雪英. 山东省9216号强热带气旋风暴期间的海岸侵蚀灾害[J].海洋地质与第四纪地质,1994,14(4):71—78.
[7] 陈子燊.弧形海岸海滩地貌对台风大浪的响应特征[J].科学通报,1995,40(23):2168—2170.
[8] 陈子燊,李志强,王扬圣.台风作用下海滩剖面地形动力与侵蚀机制分析[C]//第十三届中国海洋工程学术讨论会会议论文集.北京：海洋出版社，2007:331—336.
[9] LI Y, LARK R M, REEVE D E. Multi-scale variability of beach profiles at Duck: A wavelet analysis[J]. Coastal Engineering, 2005,52:1133—1115.
[10] REEVE D E, LI Y, LARK R M, et al. An investigation of the multi-scale temporal variability of beach profiles at Duck using wavelet packet transforms[J]. Coastal Engineering, 2007,54:401—415.
[11] WRIGHT L D, SHORT A D. Morphodynamics of beach and surf zones in Australia[M]// CRC Handbook of Coastal Processes and Erosion. Florida: CRC Press,1983:35—64.
[12] 陈子燊,李志龙,陈建耀,等.常波况下前滨剖面地形动力过程分析[J]. 海洋通报,2007,26(4):12—18.
[13] 彭玉华. 小波变换与工程应用〔M〕. 北京:科学出版社,1999:137.
[14] 张善文，雷英杰，冯有前. MATLAB在时间序列的应用〔M〕. 西安：西安电子科技大学出版社，2007：204—207.
[15] 李订芳, 胡文超, 章文. 基于小波包分析中的时间序列变点探测算法[J]. 控制与决策, 2005,20(5):521—524.
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