DERIVATION OF THE REGIONAL RAINFALL DEPTH-DURATION-FREQUENCY EQUATIONS USING LINEAR MOMENT THEORIES (CASE STUDY: KHORASAN PROVINCES)

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GHAHRAMAN B.; SHAMKOUEIAN H.; DAVARI KAMRAN

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Journal: Iranian Journal of Irrigation and Drainage Year:2010 | Volume:4 | Issue:1 Page(s): 132-142

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Title

DERIVATION OF THE REGIONAL RAINFALL DEPTH-DURATION-FREQUENCY EQUATIONS USING LINEAR MOMENT THEORIES (CASE STUDY: KHORASAN PROVINCES)

Author(s)

GHAHRAMAN B. | SHAMKOUEIAN H. | DAVARI KAMRAN | Issue Writer Certificate

Keywords

LINEAR MOMENTSQ2

REGIONAL DEPTH-DURATION-FREQUENCY RELATIONSHIPSQ3

KHORASANQ3

Abstract

The Rainfall Depth-Duration-Frequency (DDF) relationship is an important concept in hydrology, which is of important in engineering projects as well as in water structures. In this study twenty four recording rain gage stations (from Ministry of Energy) in KHORASAN provinces were considered. The region was divided in two homogeneous sections (A and B with 8 and 16 stations, respectively), by considering different parameters of mean annual precipitation (MAP), longitude, and latitude by using cluster analysis. The homogeneity of these regions were confirmed by linear moment theories. Generalized Extreme Value (GEV) were fitted to the short duration rainfalls, regional depth- duration, and depth- frequency, which were established for each region. The equations were combined to assign regional DDF relationships. The derived equations are functions of duration, frequency, and a key parameter; 10- year, 60-minute rainfall were showed a maximum error of 19%. which are able to determine the depth of rainfall in the duration of 5 to 60 minute and the frequency of 2 to 100 years. The differences of these results were negligible, as compared with the Gumble distribution.

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APA: Copy

GHAHRAMAN, B., SHAMKOUEIAN, H., & DAVARI, KAMRAN. (2010). DERIVATION OF THE REGIONAL RAINFALL DEPTH-DURATION-FREQUENCY EQUATIONS USING LINEAR MOMENT THEORIES (CASE STUDY: KHORASAN PROVINCES). IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 4(1), 132-142. SID. https://sid.ir/paper/131778/en

Vancouver: Copy

GHAHRAMAN B., SHAMKOUEIAN H., DAVARI KAMRAN. DERIVATION OF THE REGIONAL RAINFALL DEPTH-DURATION-FREQUENCY EQUATIONS USING LINEAR MOMENT THEORIES (CASE STUDY: KHORASAN PROVINCES). IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2010;4(1):132-142. Available from: https://sid.ir/paper/131778/en

IEEE: Copy

B. GHAHRAMAN, H. SHAMKOUEIAN, and KAMRAN DAVARI, “DERIVATION OF THE REGIONAL RAINFALL DEPTH-DURATION-FREQUENCY EQUATIONS USING LINEAR MOMENT THEORIES (CASE STUDY: KHORASAN PROVINCES),” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 4, no. 1, pp. 132–142, 2010, [Online]. Available: https://sid.ir/paper/131778/en

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