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University of Mohaghegh Ardabili (2016)

Analysis of flood risk in Noran chay basin by comparing the various methods of flood estimation using the WMS

Bagherzadeh Somarin, Bahareh and Zeinali, Batoul and Fazeli, Abdolrahim

Titre : Analysis of flood risk in Noran chay basin by comparing the various methods of flood estimation using the WMS

تحلیل خطرپذیری سیلاب در حوضه نوران چای با مقایسه روش های مختلف براورد سیلاب با استفاده ازمدل WMS

Auteur : Bagherzadeh Somarin, Bahareh and Zeinali, Batoul and Fazeli, Abdolrahim

Université de soutenance : University of Mohaghegh Ardabili

Grade : Master 2016

Résumé
According to the world flood ranking, Iran ranked sixth. Due to different climate type and non-uniform spatial and temporal rainfall in the Iran country, much of the precipitation has been rained at a short time, annually, that caused produce massive and grisity floods. Nouran Chay watershed is one of the important sub basins of yadibolik chay watershed, with 128 square kilometers area, that located at eastern hillsides of Sabalan Mounting. In this study maximum of daily rainfall, 19 stations extracted end it is missing data reconstracted using the Correlation method. The homogeneity and normality of data controlled by SPSS software, and also for sellection the best distribution, Data Were analyzed by Easy Fit Software. For select the best statistical probability distribution were used of the three test Kolmogorov-Smirnov, chi-square and Anderson-Darling. Results Statistical test showed the difference in the probability distribution stations is investigated. According to the Every station The most appropriate distribution for return periods of 2 to 100 years was estimated. maximum daily precipitation login to ArcGIS software And normality of data contrelled using kriging Universal, Ordinary and simple and Cokriging universal, Ordinary and simple inter pollatin method The models normal, spherical, circular and exponential, then inter polated using IDW, RBF, LPI and GPI methods. Deterministic and geostatistical methods were tested by five tests. The results showed that for return periods of 2, 5, 10, 25, 50 and 100 years, respectively cokriging model simple - circles, ordinary kriging - circular, cokriging Ordinary - exponential, RBF-CRS, cokriging simple- spherical and RBF-M Best models were obtained. According to them the average maximum daily rainfall maps for different return periods was prepared for the Watershed NOURANChay.

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