Extraction method of extreme rainfall data
This study is aimed to describe step by step procedure in extracting extreme rainfall data series. Basically, the extraction of extreme rainfall data can be achieved using two methods, block maxima (BM) and peak over threshold (POT) methods. The BM method considers extracting the extreme rainfall da...
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Published in | Journal of physics. Conference series Vol. 890; no. 1; pp. 12154 - 12160 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
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Bristol
IOP Publishing
01.09.2017
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Abstract | This study is aimed to describe step by step procedure in extracting extreme rainfall data series. Basically, the extraction of extreme rainfall data can be achieved using two methods, block maxima (BM) and peak over threshold (POT) methods. The BM method considers extracting the extreme rainfall data recorded each year during a specific duration, meanwhile the POT method is extracting all extreme rainfall data above a predefined threshold. Using the BM method, the regional pooling of 1-, 3-, 5- and 10-day are used and the maximum rainfall data are chosen among the pooled day within each year. For POT method, two methods are presented. Method 1 of POT method determines a threshold based on 95% percentile while Method 2 determines the threshold graphically using mean residual life plot and threshold stability plot. Based on the selection of the threshold value, a simulation study is conducted to identify the range of appropriate quantile estimate for a proper selection of the threshold value. For illustration of the methodology, daily rainfall data from the rainfall station at Klinik Chalok Barat, Terengganu is chosen. Both methods used are able to identify the extreme rainfall series. This study is important as it helps in identifying the good set of extreme rainfall series for further use such as in extreme rainfall modelling. |
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AbstractList | This study is aimed to describe step by step procedure in extracting extreme rainfall data series. Basically, the extraction of extreme rainfall data can be achieved using two methods, block maxima (BM) and peak over threshold (POT) methods. The BM method considers extracting the extreme rainfall data recorded each year during a specific duration, meanwhile the POT method is extracting all extreme rainfall data above a predefined threshold. Using the BM method, the regional pooling of 1-, 3-, 5- and 10-day are used and the maximum rainfall data are chosen among the pooled day within each year. For POT method, two methods are presented. Method 1 of POT method determines a threshold based on 95% percentile while Method 2 determines the threshold graphically using mean residual life plot and threshold stability plot. Based on the selection of the threshold value, a simulation study is conducted to identify the range of appropriate quantile estimate for a proper selection of the threshold value. For illustration of the methodology, daily rainfall data from the rainfall station at Klinik Chalok Barat, Terengganu is chosen. Both methods used are able to identify the extreme rainfall series. This study is important as it helps in identifying the good set of extreme rainfall series for further use such as in extreme rainfall modelling. |
Author | Zakaria, Roslinazairimah Ahmad Radi, Noor Fadhilah Satari, Siti Zanariah |
Author_xml | – sequence: 1 givenname: Roslinazairimah surname: Zakaria fullname: Zakaria, Roslinazairimah email: roslinazairimah@ump.edu.my organization: Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang , Malaysia – sequence: 2 givenname: Noor Fadhilah surname: Ahmad Radi fullname: Ahmad Radi, Noor Fadhilah organization: Institute of Engineering Mathematics, Universiti Malaysia Perlis , Malaysia – sequence: 3 givenname: Siti Zanariah surname: Satari fullname: Satari, Siti Zanariah organization: Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang , Malaysia |
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Cites_doi | 10.1023/A:1008001312219 10.4038/sljastats.v15i2.7411 10.1002/joc.943 10.1016/j.jhydrol.2012.10.036 10.1007/978-1-4471-3675-0 10.5194/hessd-10-6049-2013 10.1098/rspa.2011.0412 10.1016/j.wace.2014.10.001 10.1175/JCLI-3296.1 10.1093/biomet/asr080 10.1007/s00704-011-0487-8 10.2166/wst.2002.0028 |
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References | 12 14 15 Zalina M (3) 2002; 45 Thibaud E (11); 49 1 2 Deka S (4) 2009; 27 5 6 Beguera S (13); 31 7 8 9 10 |
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Title | Extraction method of extreme rainfall data |
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