EVALUATION OF THE MOST IMPORTANT FACTORS EFFECTING MAXIMUM FLOOD DISCHARGE USING SENSITIVITY ANALYSIS OF EMPIRICAL FORMULAE

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DASTORANI M.T.; KHAYATZADEH M.

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Journal: Journal of Arid Biome Year:2010 | Volume:1 | Issue:1 Page(s): 1-12

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Title

EVALUATION OF THE MOST IMPORTANT FACTORS EFFECTING MAXIMUM FLOOD DISCHARGE USING SENSITIVITY ANALYSIS OF EMPIRICAL FORMULAE

Author(s)

DASTORANI M.T. | KHAYATZADEH M. | Issue Writer Certificate

Keywords

SENSITIVITY ANALYSISQ2

WATERSHEDQ2

PEAK DISCHARGEQ2

EMPIRICAL FORMULAEQ3

AREAL COEFFICIENTQ2

Abstract

One of the most important tasks in catchment hydrological analysis is flood and flooding, and therefore estimation of river PEAK DISCHARGEs is necessary. PEAK DISCHARGE estimation as design flood is the base and necessary element of water related projects and designs. In ungaged catchments where no enough measured data is available, empirical approaches are usually applied to estimate the maximum flood discharge. They are usually based on one or more factors such as drainage area that cause flood, and most of these methods have been proposed for a certain area with specific physical and climatic conditions. To use these methods in other areas with different conditions, evaluation and analysis of the sensitivity of their parameters seems to be necessary. In this research a simple new and efficient method has been used to carry on SENSITIVITY ANALYSIS of ten empirical flood estimation methods including Creager, Diken, Fuller, Fanning, Inglis, Coutange, Mayer, Horton, USGS and German, in which some of them are the most famous existing methods. The results show high sensitivity of all equations to area in its lower ranges. In other word, small changes in catchment area for small WATERSHEDs cause large variation in model output (peak discharge). Also in most of the equations, the role of area is decreased in comparison to the C coefficient in large WATERSHEDs. It means that as the area of catchment increases, its role on PEAK DISCHARGE decreases. In some equations such as Fuller, the output is also very sensitive to return period especially in the range lower return periods.

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APA: Copy

DASTORANI, M.T., & KHAYATZADEH, M.. (2010). EVALUATION OF THE MOST IMPORTANT FACTORS EFFECTING MAXIMUM FLOOD DISCHARGE USING SENSITIVITY ANALYSIS OF EMPIRICAL FORMULAE. ARID BIOM SCIENTIFIC AND RESEARCH JOURNAL, 1(1), 1-12. SID. https://sid.ir/paper/199768/en

Vancouver: Copy

DASTORANI M.T., KHAYATZADEH M.. EVALUATION OF THE MOST IMPORTANT FACTORS EFFECTING MAXIMUM FLOOD DISCHARGE USING SENSITIVITY ANALYSIS OF EMPIRICAL FORMULAE. ARID BIOM SCIENTIFIC AND RESEARCH JOURNAL[Internet]. 2010;1(1):1-12. Available from: https://sid.ir/paper/199768/en

IEEE: Copy

M.T. DASTORANI, and M. KHAYATZADEH, “EVALUATION OF THE MOST IMPORTANT FACTORS EFFECTING MAXIMUM FLOOD DISCHARGE USING SENSITIVITY ANALYSIS OF EMPIRICAL FORMULAE,” ARID BIOM SCIENTIFIC AND RESEARCH JOURNAL, vol. 1, no. 1, pp. 1–12, 2010, [Online]. Available: https://sid.ir/paper/199768/en

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