EVALUATION OF PERFORMANCE OF DIFFERENT METHODS FOR ESTIMATING RETURN PERIOD OF DROUGHT DURATION UNDER TIME-INDEPENDENT AND TIME-DEPENDENT PRECIPITATION SERIES

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BAZRAFSHAN J.; HOORFAR A.; KHALILI A.; TORABI S.; HAJJAM S.

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Journal: IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING Year:2009 | Volume:3 | Issue:8 Page(s): 1-10

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Title

EVALUATION OF PERFORMANCE OF DIFFERENT METHODS FOR ESTIMATING RETURN PERIOD OF DROUGHT DURATION UNDER TIME-INDEPENDENT AND TIME-DEPENDENT PRECIPITATION SERIES

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Keywords

DROUGHT DURATIONQ3

RETURN PERIODQ2

PROBABILITY DISTRIBUTION FUNCTIONQ2

TIME INDEPENDENCE AND TIME- DEPENDENCE CONDITIONS AND KERMANSHAHQ3

Abstract

DROUGHT DURATION is defined from different viewpoints. Estimation methods of DROUGHT DURATION RETURN PERIOD are different in terms of DROUGHT DURATION definition. This paper is aimed to perform six estimation methods of DROUGHT DURATION RETURN PERIOD at Kermanshah station, as a case study. The standardized precipitation index (SPI) is used to monitor drought based on historical and synthetic series of total precipitation data in annual and monthly timescales. Probability distribution of DROUGHT DURATION was analyzed for time series of SPI. Different methods for estimating RETURN PERIOD of DROUGHT DURATION on historical and synthetic time series of SPI were applied. Findings answered two main questions: a) if the length of historical record was enough to estimate drought RETURN PERIOD at the station of interest? b) If the obtained RETURN PERIODs based on different methods have enough conformity with empirically obtained RETURN PERIOD? Results are discussed in details in this paper.

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APA: Copy

BAZRAFSHAN, J., HOORFAR, A., KHALILI, A., TORABI, S., & HAJJAM, S.. (2009). EVALUATION OF PERFORMANCE OF DIFFERENT METHODS FOR ESTIMATING RETURN PERIOD OF DROUGHT DURATION UNDER TIME-INDEPENDENT AND TIME-DEPENDENT PRECIPITATION SERIES. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, 3(8), 1-10. SID. https://sid.ir/paper/134815/en

Vancouver: Copy

BAZRAFSHAN J., HOORFAR A., KHALILI A., TORABI S., HAJJAM S.. EVALUATION OF PERFORMANCE OF DIFFERENT METHODS FOR ESTIMATING RETURN PERIOD OF DROUGHT DURATION UNDER TIME-INDEPENDENT AND TIME-DEPENDENT PRECIPITATION SERIES. IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING[Internet]. 2009;3(8):1-10. Available from: https://sid.ir/paper/134815/en

IEEE: Copy

J. BAZRAFSHAN, A. HOORFAR, A. KHALILI, S. TORABI, and S. HAJJAM, “EVALUATION OF PERFORMANCE OF DIFFERENT METHODS FOR ESTIMATING RETURN PERIOD OF DROUGHT DURATION UNDER TIME-INDEPENDENT AND TIME-DEPENDENT PRECIPITATION SERIES,” IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, vol. 3, no. 8, pp. 1–10, 2009, [Online]. Available: https://sid.ir/paper/134815/en

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