Frequency analysis of maximum daily rainfalls via L-moment approach

Ani Shabri, and Noratiqah Mohd Ariff, (2009) Frequency analysis of maximum daily rainfalls via L-moment approach. Sains Malaysiana, 38 (2). pp. 149-158. ISSN 0126-6039



Knowledge related to distributions of rainfall amounts are of great importance for the design of water related structures. The greater problem faced by the hydrologists and engineers is identifying the best distribution form for regional data. The main goal of the study is to perform regional frequency analysis of maximum daily rainfalls selected each year among daily rainfalls measured over stations in Selangor and Kuala Lumpur using the L-moment method. Several distributions were taken into account in this study which include two-parameter normal (NOM), lognormal (LN2), three-parameter lognormal (LN3), logistic (LOG), generalized logistic (GLO), extreme value type I (EV1), generalized extreme value (GEV) and generalized Pareto (GPA) distribution. The most suitable distribution was determined according to the mean absolute deviation index (MADI), mean square deviation index (MSDI) and the L-moment ratio diagram. The result of this study showed that the GLO distribution is the most suitable distribution to fit the data of maximum daily rainfalls for stations in Selangor and Kuala Lumpur.

Item Type:Article
Keywords:Regional frequency analysis; flood frequency; L-moment ratio; maximum daily rainfalls
Journal:Sains Malaysiana
ID Code:73
Deposited By: Mr Fazli Nafiah -
Deposited On:12 Oct 2010 01:31
Last Modified:14 Dec 2016 06:26

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