توصيفگر ها :
ناحيه اي كردن , توزيع منطقه اي , روش دالريمپل , منحني هاي اندرو , تحليل خوشه اي , روش هاسكينگ و واليس , نمودار نسبت گشتاور هاي خطي
چكيده انگليسي :
93 Assessing the performance of homogeneity tests in regional flood frequency analysis in Caspian Sea basin Maryam Malekpour m malekpour@na iut ac ir Date of Submission 2015 09 22 Department of Natural Resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Saeed Soltani Koupaei ssoltani@cc iut ac irAbstractIn the design of hydraulic structures and water resources management need to inform thedischarge values at different probability levels in a basin The major problem in this regardis the ungauged basins or with short time data basins One of the suggested methods toovercome this problem is the regional flood frequency analysis The determininghomogeneous areas should be done before Regional flood frequency analysis This study examined four homogeneous methods including Dalrymple Andrew curves cluster analysis Hosking and Wallis and then their results were analyzed In this study number of selected stations were 112 Physiographic climatic andhydrological features of basins were extracted by ARC GIS 9 3 Dalrymple test wasconducted on peak flow and Andrew curves method was done using physiographic climatic and hydrological variables Ward cluster analysis method was performed in SYSTAT 13 software Hosking and Wallismethod was calculated measure of discordance Di and heterogeneity measure Hi on thehydrological statistical properties It also using ZDIST was chosen appropriate regionaldistribution Hosking and Wallis method provide more performance results and Dalrymplemethod is less accurate than other methods Key words Regional flood frequency analysis regionalization regional distribution homogeneous tests Dalrymple method Andrew curves cluster analysis Hosking and Wallis L moment ratio diagram
