Regional Frequency Analysis of Significant Wave Heights Based on L-moments

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Regional Frequency Analysis of Significant Wave Heights Based on L-moments

L-moments are defined as linear combinations of probability-weighted moments. They are virtually unbiased for small samples, and perform well in parameter estimation, choice of the distribution type and regional analysis. The traditional methods of determining the design wave heights for planning marine structures use data only from the site of interest. Regional frequency analysis gives a new approach to estimate quantile by use of the homogeneous neighborhood information. A regional frequency analysis based on L-moments with a case study of the California coast is presented. The significant wave height data for the California coast is offered by NDBC. A 6-site region without 46023 is considered to be a homogeneous region, whose optimal regional distribution is Pearson Ⅲ. The test is conducted by a simulation process. The regional quantile is compared with the at-site quantile, and it is shown that efficient neighborhood information can be used via regional frequency analysis to give a reasonable estimation of the site without enough historical data.水利论文 Wlk ~!iO

作 者: MA Qing-shan LI Yan-bao LI Jing  
作者单位:MA Qing-shan(School of Civil Engineering, Tianjin University, Tianjin 300072, China;China Harbour Engineering Co. Ltd, Beijing 100027, China)水利论文J8WK%Q(K-W$a3@%R
LI Yan-bao(School of Civil Engineering, Tianjin University, Tianjin 300072, China)
+]yr)U/np0LI Jing(School of Social Sciences and Foreign Langue, Tianjin University, Tianjin 300072, China) 
刊 名:中国海洋工程(英文版)  ISTIC EI SCI
英文刊名:CHINA OCEAN ENGINEERING 
年,卷(期):2006 20(1) 
分类号:P75 
关键词:L-moments   regional frequency analysis   significant wave heights   simulation  
机标关键词:Significant Wave Heightsregional frequency analysissignificant wave heightregional distributionparameter estimationlinear combinationssimulation processmarine structuresdistribution typesmall sampleswave heightsmethods ofcase study 
基金项目:the National Natural Science Foundation of China 
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