“RESEARCH NOTE” THE ESTIMATION OF ONE DAY DURATION PROBABLE MAXIMUM PRECIPITATION OVER ATRAK WATERSHED IN IRAN

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GHAHRAMAN B.

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Paper Information

Journal: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING Year:2008 | Volume:32 | Issue:B2 Page(s): 175-179

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Title

“RESEARCH NOTE” THE ESTIMATION OF ONE DAY DURATION PROBABLE MAXIMUM PRECIPITATION OVER ATRAK WATERSHED IN IRAN

Author(s)

GHAHRAMAN B. | Issue Writer Certificate

Keywords

PMPQ3

PRECIPITATIONQ3

ATRAK WATERSHEDQ3

IRANQ3

FREQUENCYQ3

Abstract

The probable maximum PRECIPITATION (PMP) for many stations in IRAN and other places using the Hershfield formula is routinely estimated as the mean plus 15 standard deviations processed from one-day yearly maximum rainfall values. However, the value of 15 may not be suitable for all stations with different climatic specifications. In this paper, yearly maximum one day rainfall data of 20-36 years for 30 stations in the ATRAK WATERSHED region in the northeast of IRAN were analyzed in an attempt to estimate PMP for a one day duration based on an appropriate FREQUENCY factor. Based on the actual maximum daily rainfall data of these stations, the highest value of these FREQUENCY factors was found to be 9.63 for a one day duration. This FREQUENCY factor was subsequently used to estimate one day PMP values. Using these PMP estimates, a generalized pattern for the spatial distribution of one day PMP was demonstrated. It was found that one day PMP over the ATRAK WATERSHED ranges from 97 to 295 mm, and the mean ratio of PMP to the highest observed one day rainfall was about 2.51. The PMP maps are considered important tools to determine reliable and consistent estimates for any location in the ATRAK WATERSHED for large hydraulic structure designs.

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APA: Copy

GHAHRAMAN, B.. (2008). “RESEARCH NOTE” THE ESTIMATION OF ONE DAY DURATION PROBABLE MAXIMUM PRECIPITATION OVER ATRAK WATERSHED IN IRAN. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, 32(B2), 175-179. SID. https://sid.ir/paper/62376/en

Vancouver: Copy

GHAHRAMAN B.. “RESEARCH NOTE” THE ESTIMATION OF ONE DAY DURATION PROBABLE MAXIMUM PRECIPITATION OVER ATRAK WATERSHED IN IRAN. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING[Internet]. 2008;32(B2):175-179. Available from: https://sid.ir/paper/62376/en

IEEE: Copy

B. GHAHRAMAN, ““RESEARCH NOTE” THE ESTIMATION OF ONE DAY DURATION PROBABLE MAXIMUM PRECIPITATION OVER ATRAK WATERSHED IN IRAN,” IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, vol. 32, no. B2, pp. 175–179, 2008, [Online]. Available: https://sid.ir/paper/62376/en

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