Regional Frequency Analysis of Significant Wave Heights Based onL-moments  

作　　者：马青山 李炎保 李静 

机构地区：[1]School of Civil Engineering, Tianjin University, Tianjin 300072,China,China Harbour Engineering Co . Ltd, Beijing100027,China [2]School of Civil Engineering, Tianjin University, Tianjin 300072,China [3]School of Social Sciences and Foreign Langue , Tianjin University, Tianjin 300072,China

出　　处：《China Ocean Engineering》2006年第1期85-98,共14页中国海洋工程（英文版）

基　　金：This research was financially supported bythe National Natural Science Foundation of China (Grant No.50279028)

摘　　要：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 informatian. 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.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 informatian. 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.

关 键 词：L-MOMENTS regional frequency analysis significant wave heights SIMULATION 

分 类 号：P731.22[天文地球—海洋科学]