Flood frequency analysis for annual peak discharges records in an urban drainage basin
Publish place: دومین کنفرانس بین المللی پژوهش در مهندسی، علوم و تکنولوژی
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
RSTCONF02_026
تاریخ نمایه سازی: 21 شهریور 1395
Abstract:
In this study, amounts of peak discharge and frequency of floods in the urban watershed are investigated. A framework for flood frequency analysis is based on the Regional equations for estimating, 1, 2, 5, 10, 20, 25, 50, 100, 500, 1000 and 10000-year flood-peak discharges were calculated on unregulated streams in Kermanshah plain of Iran. Flood-frequency estimates determined for 4 stream flow-gaging stations in the study area. Special mathematical functions were considered aiming flow-frequency relation by statistical analysis of the series of recorded annual maximum flows and finding an appropriate distribution with use Minimum chi-squared tests. Values of explanatory variables used in the method were determined from digital spatial data sets by means of a geographic information system (GIS), which was determined by digitizing the area within basin boundaries manually delineated on topographic maps. The results shown 2-parameter gamma distribution and Gamble distribution were fit distribution on estimating flood-frequency characteristics
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Authors
ali khazaei
Corresponding Author: Department of physical geography, Razi University, Kermanshah, Iran
iraj jabbari
Department of physical geography, Razi University, Kermanshah, Iran