Regional Frequency Analysis of Extreme Rainfalls in the West Coast of Peninsular Malaysia using Partial L-Moments

Zakaria, Zahrahtul Amani and Shabri, Ani and Ahmad, Ummi Nadiah (2012) Regional Frequency Analysis of Extreme Rainfalls in the West Coast of Peninsular Malaysia using Partial L-Moments. Water Resources Management, 26 (2012). pp. 4417-4433. ISSN 0920-4741

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Abstract

This study was to reinstate the development of regional frequency analysis using L-moments approach. The Partial L-moments (PL-moments) method was employed and a new relationship for homogeneity analysis is developed. For this study, the PL-moments for generalized logistic (GLO), generalized pareto (GPA) and generalized value (GEV) distributions were derived based on the formula defined by Wang (Water Resour Res 32:1767–1771, 1996). The three distributions are used to develop the regional frequency analysis procedures. As a case of study, the Selangor catchment that consists of 30 sites which located on the west coast of Peninsular Malaysia has chosen as sample. Based on L-moment and PL-moment ratio diagrams as well as Z-test statistics, the GEVand GLO were identified as the best distributions to represent the statistical properties of extreme rainfalls in Selangor. Monte Carlo simulation shows that the method of PL-moments would outperform L-moments method for estimation of large returns period event.

Item Type: Article
Keywords: L-moments, Partial L-moments, Regional homogeneity, Frequency analysis
Subjects: Q Science > Q Science (General)
Faculty / Institute: Faculty of Informatics & Computing
Depositing User: Dr Zahrahtul Amani Zakaria
Date Deposited: 13 Jan 2015 08:31
Last Modified: 13 Jan 2015 08:31
URI: http://erep.unisza.edu.my/id/eprint/473

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