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Wahyu Samsudin
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Computer Science & IT Decision Sciences, Operations Research & Management Mathematics

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Analisis Statistik dalam Pendugaan Curah Hujan Studi Kasus di DAS Ciliwung Hulu Wahyu Samsudin
Jurnal Aplikasi Statistika & Komputasi Statistik Vol 8 No 1 (2016): Journal of Statistical Application & Statistical Computing
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Statistika STIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1139.301 KB) | DOI: 10.34123/jurnalasks.v8i1.11

Abstract

Determining for distribution of rainfall is a very important part in determining the plans of rainfall in a region. This study used daily rainfall data in 1992-2009 from three rainfall stations,namely Gunung Mas, Citeko and Gadog. Thiessen polygon method is used to determine the average rainfall region. The distribution of rainfall is determined by using statistical analysis with Chi-Square test. Based on the results of distribution suitability testing by using Chi-Square (χr2) with significance (α) we obtained χr2 value of 6.50 while the χr2 table is 7.185. Since the calculated χr2< χr2 table, then the Gumbel distribution is eligible. So that the distribution pattern of the right to Ciliwung upstream is the Gumbel distribution. The amount of planned rainfall-plant the upstream Ciliwung watershed based on the Gumbel distribution for the return period of 2, 5, 10, 25, 50, and 100 years, respectively are 70.98 mm, 88.98 mm, 99.55 mm, 113.93 mm , 124.59 mm and 135.18 mm.
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