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Research on Statistical Characteristics and Calculation Methods of Wind-wave of Poyang-lake

Author: LiShengChao
Tutor: ZhaoLiPing
School: Changsha University of Science and Technology
Course: Port, Coastal and Offshore Engineering
Keywords: Storm Wavelet analysis Spectrum estimation Wave height - cycle distribution Calculation methods
CLC: P343.3
Type: Master's thesis
Year: 2008
Downloads: 40
Quote: 0
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Abstract


This article is the subject of relying on the Jiangxi Provincial Communications technology projects funded . Poyang Lake is China's largest freshwater lake , has been the focus of Jiangxi Province, flood control . Carry a certain amount of energy due to storms , strong winds, big waves will embankment enormous impact , sometimes capsize the wreck of the phenomenon . Poyang Lake storms mainly occurred in the water of the rivers and lakes of the junction and lakes beam area , and Poyang Lake water level fluctuation complexity and amplitude characteristics of large , maximum wave height of up to one meter , low water level determined to design a new port terminal brought great difficulties during a flood at the same time as the Poyang Lake area of Jiangxi Province, flood control focus to bear the the water increasing role when the storms near the embankment . Storms research is to carry out the storms and embankment interaction research foundation , to carry out research of the Poyang Lake storms statistical characteristics and wave spectrum , can provide the basis for sustainable development to resolve Poyang Lake . 2007 6-9 tie in the the planetesimals incoming flights are and duchang incoming flights are of in Xingzi County the Silver Stars Shipyard , and DUCHANG Laoyemiao near the lake on the rough prototype observation . According to the observations of the Poyang Lake region , wavelet analysis (Wavelet) Wind wave spectrum estimation and traditional autocorrelation function method (FTA) and the fast Fourier transform (FFT) analysis and comparison of estimation methods , to discuss the principles of the wavelet analysis . The results show that the wavelet analysis method is superior to the traditional methods , wavelet analysis can be drawn to the three-dimensional distribution of wave energy in the time domain and frequency domain characteristics , and the results of the wavelet analysis of the time integration , can get wave spectrum in the frequency distribution of the resulting spectrum compared with the results of traditional methods is more accurate , more informative . Finally, the method of mathematical statistics and theoretical analysis , the authors also explore the wave height and wave period of the Poyang Lake area and binary joint study of the relationship between the Poyang Lake storms elements with wind speed, wind zone length and depth , draw a set of applicable wave elements in the state of deep and shallow water storms formula . The proposed dimensionless storms the spectral formulas and wave elements calculated and measured values ??have a good consistency , good agreement.

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CLC: > Astronomy,Earth Sciences > Geophysics > Hydrological Sciences (water sector physics) > Land hydrology, hydrology (water phenomenology ) > Lakes and reservoirs
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