太湖波浪特征参数反演计算
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摘要
为研究声学多普勒流速仪(acoustic doppler velocimetry,ADV)测量的流速与水压数据在湖泊波浪特征参数反演中的适用性,在太湖梅梁湖和湖心区两个区域进行野外观测,利用预处理后的水压和流速数据进行傅里叶变换和转换获得表面波浪谱,取截断频率为0.03~0.5 Hz对表面波浪谱进行反演计算。结果表明,梅梁湾5月和湖心7月使用水压数据反演得到的有效波高分别为0.454 m、0.187 m,有效波周期分别为2.82 s、2.56 s;使用ADV流速数据反演计算得到的有效波高分别为0.451 m、0.181 m,有效波周期分别为2.82 s、2.62 s;与使用压力式方向波潮仪测得的有效波高(0.461 m,0.180 m)和有效波周期(2.77 s,2.60 s)非常接近且变化趋势基本相同,可见ADV的水压和流速数据可用来进行湖泊的波浪的计算。
In order to study the application of the data of velocity and water pressure measured by acoustic doppler velocimeter( ADV) in the inversion calculation of wave characteristics parameters,field observations in two sites in Taihu Lake were carried out, and the data of water pressure and velocity after preprocessing were Fourier transformed to obtain surface wave spectra,taking the truncation frequency of 0. 03 ~ 0. 5 Hz to have inversion calculation. The results showed that the effective wave heights obtained from the inversion calculation of water pressure data of May in Meiliang Bay and of July in lake heart were 0. 454 m,187 m,respectively,and the effective wave periods of which were 2. 82 s,2. 56 s,respectively. The effective wave heights of May in Meiliang Bay and of July in lake heart calculated by using ADV velocity data were 0. 451 m,0. 181 m respectively,and the effective wave periods of which were 2. 82 s,2. 62 s,respectively,which is very close to the effective wave height( 0. 461 m,0. 18 m) and effective wave period( 2. 77 s,2. 60 s) obtained by DWR,and the change trend is basically the same. Accordingly,ADV pressure and velocity data can be used for the lake wave calculation.
In order to study the application of the data of velocity and water pressure measured by acoustic doppler velocimeter( ADV) in the inversion calculation of wave characteristics parameters,field observations in two sites in Taihu Lake were carried out, and the data of water pressure and velocity after preprocessing were Fourier transformed to obtain surface wave spectra,taking the truncation frequency of 0. 03 ~ 0. 5 Hz to have inversion calculation. The results showed that the effective wave heights obtained from the inversion calculation of water pressure data of May in Meiliang Bay and of July in lake heart were 0. 454 m,187 m,respectively,and the effective wave periods of which were 2. 82 s,2. 56 s,respectively. The effective wave heights of May in Meiliang Bay and of July in lake heart calculated by using ADV velocity data were 0. 451 m,0. 181 m respectively,and the effective wave periods of which were 2. 82 s,2. 62 s,respectively,which is very close to the effective wave height( 0. 461 m,0. 18 m) and effective wave period( 2. 77 s,2. 60 s) obtained by DWR,and the change trend is basically the same. Accordingly,ADV pressure and velocity data can be used for the lake wave calculation.
引文
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[2]谢友鸽,郭金运,朱金山,等.基于SWAN模型的东沙岛海域有效波高模拟与分析[J].山东科技大学学报(自然科学版),2016(3):17-24.(XIE Youge,GUO Jinyun,ZHU Jinshan,et al.Simulation and analysis of significant wave height over seas of Dongsha island base on SWAN model[J].Journal of Shandong University of Science and Technology,2016(3):17-24(in Chinese))
[3]GAO Xiaomeng,LI Yiping,TANG Chunyan,et al.Using ADV for suspended sediment concentration and settling velocity measurements in large shallow lakes[J].Environmental Science and Pollution Research,2017,24(3):2675-2684.
[4]OS R B,SOUZA A.Measuring hydrodynamics and sediment transport processes in the Dee Estuary[J].Earth System Science Data Discussions,2010,3(1):157-165.
[5]MACVEAN L J,LACY J R.Interactions between waves,sediment,and turbulence on a shallow estuarine mudflat[J].Journal of Geophysical Research:Oceans,2014,119(3):1534-1553.
[6]芦军,范代读,涂俊彪,等.潮滩上应用ADV进行波浪观测与特征参数计算[J].海洋通报,2016(5):523-531.(LU Jun,FAN Daidu,TU Junbiao,et al.Application of ADV in the tidal flat to observe wave processes and calculate their characteristic parameters[J].Marine Science Bulletin,2016(5):523-531(in Chinese))
[7]王建威,李一平,罗潋葱,等.太湖风生流垂向切变规律的原位观测[J].水资源保护,2016,32(6):98-103.(WANG Jianwei,LI Yiping,LUO Liancong,et al.Field observation of vertical shear of wind-driven current in Taihu Lake[J].Water Resources Protection,2016,32(6):98-103.(in Chinese))
[8]徐瑞忠,陆雪林,盛根明,等.风浪对浅水湖泊水质的影响机制[J].水资源保护,2016,32(3):117-120.(XU Ruizhong,LU Xuelin,SHENG Genming,et al.Influencing mechanism of wind waves on water quality in shallow lake[J].Water Resources Protection,2016,32(3):117-120(in Chinese))
[9]唐洪武,肖洋,陈玛丽,等.声学多普勒流速仪自动测量和分析系统[J].计算机测量与控制,2003(9):651-654.(TANG Hongwu,XIAO Yang,CHEN Mali,et al.Acoustic-doppler velocimeter automatic measuring and analyzing system[J].Computer Measurement&Control,2003(9):651-654(in Chinese))
[10]FUGATE D C,FRIEDRICHS C T.Determining concentration and fall velocity of estuarine particle populations using ADV,OBS and LISST[J].Continental Shelf Research,2002,22(11/12/13):1867-1886.
[11]鲁远征,吴加学,刘欢.河口底边界层湍流观测后处理技术方法分析[J].海洋学报,2012,34(5):39-49.(LU Yuanzheng,WU Jiaxue,LIU Huan.An integrated postprocessing technique for turbulent flow in estuarine boundary layer[J].Acta Oceanologica Sinica,2012,34(5):39-49.(in Chinese))
[12]CHANSON H,TREVETHAN M,AOKI S I.Acoustic Doppler velocimetry(ADV)in small estuary:field experience and signal post-processing[J].Flow Measurement&Instrumentation,2008,19(5):307-313.
[13]李志强,陈子燊,李志龙.近岸带波浪传播过程中波性质的统计对比分析[J].广东海洋大学学报,2010,30(4):43-47.(LI Zhiqiang,CHEN Zishen,LI Zhilong.Statistical analysis and comparison on wave characteristics during wave propagating in nearshore zone[J].Journal of Guangdong Ocean University,2010,30(4):43-47.(in Chinese))
[14]GORDON L,LOHRMANN A.Near-shore doppler current meter wave spectra[J].Oceans,2001(1):273.
[15]BASCO D R.Water wave mechanics for engineers and scientists[J].Eos Transactions American Geophysical Union,1991,66(24):490-491.
[16]李瑞丽.海浪周期关系的研究[J].海洋湖沼通报,2007(2):13-18.(LI Ruili.On the relationships of various wind wave period[J].Transactions of Oceanology and Limnology,2007(2):13-18.(in Chinese))
[17]WIBERG P L,SHERWOOD C R.Calculating wavegenerated bottom orbital velocities from surface-wave parameters[J].Computers&Geosciences,2008,34(10):1243-1262.
[18]陈子燊,李志强,李志龙,等.海滩碎波带波性质的统计对比分析[J].中山大学学报(自然科学版),2002(6):86-90.(CHEN Zishen,LI Zhiqiang,LI Zhilong,et al.Propagation of the Complex Cracks in Rocks Without Water Pressure[J].Journal of Sun Yat-sen University,2002(06):86-90(in Chinese))