Exploration of Randomness Characteristic of Rainfall Pattern Using RDP Model in Symareh Catchment.

Subject Areas : environmental management

Ahmad Sharafti ¹ , Mohammad Reza Khazaei ²

1 - Assistant Professor, Technical and Engineering Department, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran *(Corresponding Author)
2 - Assistant Professor, Department of Civil Engineering, Payame Noor University, Tehran, Iran.

Received: 2015-05-30 Accepted : 2015-10-13 Published : 2017-03-21

Keywords: RDP Model, Uncertainty, Rainfall Pattern,

Abstract :

Background and Objective: Rainfall pattern is one of the most important and effective variable in flood simulation. Variation of rainfall intensity in each event is illustrated by rainfall pattern. Many random variable cause the stochastic property of rainfall pattern. According to the relation between rainfall pattern and flood, uncertainty of flood is related to the variability of rainfall pattern. Method: In this study, the RDP (Rainfall Data Processor), is used to quantify randomness characteristic of rainfall pattern in Symareh catchment. Findings: The obtain result shown, the Brust factor in rainfall events with long time duration and more depth is less than others. Also, more than 60 percent of observed events in Symareh catchment are belong to type 1 and 2 categories. Discussionand Conclusion the obtained result shown, the fraction of cumulative rainfall depth has not the same pattern. Also, the minimum uncertainty are related to the rainfall patterns that belong to the type 2 and has less depth and also more duration. 

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