Frequency analysis of annual maximum rainfall series using L-moment methods on Yesilirmak Basin in Turkey

ANLI A. S.

Journal of Food, Agriculture and Environment, cilt.11, sa.3-4, ss.1763-1767, 2013 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 3-4
  • Basım Tarihi: 2013
  • Dergi Adı: Journal of Food, Agriculture and Environment
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Food Science & Technology Abstracts, Veterinary Science Database
  • Sayfa Sayıları: ss.1763-1767
  • Anahtar Kelimeler: Diagnostic measures, L-moments, Maximum rainfall, Quantile estimate, Regionalization, Yesilirmak basin
  • Ankara Üniversitesi Adresli: Evet

Özet

The study aims at performing frequency analysis using L-moments approach of annual daily maximum rainfall (ADMR) series from 63 raingauge stations in Yesilirmak basin in Turkey. For the regional analysis, the stations in the basin were formed six homogeneous groups according to discordancy measure, because of some of all stations in the basin were discordant. Goodness-of-fit criteria based on L-moments approach was used to carry out the best-suitable frequency distribution belonging to a homogeneous region. The criteria termed as ZDIST was estimated for various candidate frequency distributions. For the six homogeneous regions in Yesilirmak basin, the ZDIST criteria introduced various distributions as bestsuitable distribution, namely, Generalized Logistic (GLO), Generalized Extreme Values (GEV), Generalized Normal (GNO), Generalized Pareto (GPA) and Pearson Type 3 (PE3) distributions. The most suitable distributions having the minimum ZDIST for the homogeneous regions from one to six were selected, GLO for region 1 and 6, GNO for region 2, GEV for region 3 and 4 and, PE3 for region 5, respectively.