REGIONAL FLOOD FREQUENCY ANALYSIS OF CEYHAN RIVER BASIN IN TURKEY USING L-MOMENTS METHOD

SEÇKİN N., YURTAL R., Haktanir T., TOPALOĞLU F.

FRESENIUS ENVIRONMENTAL BULLETIN, vol.19, pp.2616-2624, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19
  • Publication Date: 2010
  • Journal Name: FRESENIUS ENVIRONMENTAL BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2616-2624
  • Keywords: L moments, Regional flood frequency, Probability distribution, MODEL SELECTION, IDENTIFICATION, DIAGRAMS
  • Çukurova University Affiliated: Yes

Abstract

Hydrological homogeneity of the Ceyhan River Basin from the standpoint of annual flood peaks frequency is determined by the index flood procedure coupled with the L-moments method instead of the method of conventional moments The L-moments analysis of the recorded annual flood peaks data at 19 gauged sites indicates that the Ceyhan Basin is hydrologically heterogeneous as a whole, but, it can be divided in two homogeneous sub-regions Generalized Logistic, Generalized Extreme Values, Generalized Normal, Pearson Type III, Wakeby, and Generalized Pareto distributions are applied in both sub-regions The Z statistics test is used to determine the more suitable one among these probability distributions, which points towards the Generalized Logistic distribution for both sub-regions of the Ceyhan River Basin A regional curve of flood frequency analysis for each sub-region is developed as the outcome of the study