THE INFLUENCE OF TEMPORAL VARIATION OF RAINFALL ON LINEAR-NONLINEAR RESPONSE OF MOUNTAINOUS CATCHMENTS

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REZAEI SADR H.; AKHOOND ALI A.M.; RADMANESH F.; PARHAM GH.A.

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Journal: Journal of Water and Soil Conservation Year:2013 | Volume:20 | Issue:6 Page(s): 219-235

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Title

THE INFLUENCE OF TEMPORAL VARIATION OF RAINFALL ON LINEAR-NONLINEAR RESPONSE OF MOUNTAINOUS CATCHMENTS

Author(s)

REZAEI SADR H. | AKHOOND ALI A.M. | RADMANESH F. | PARHAM GH.A. | Issue Writer Certificate

Keywords

RAINFALLQ2

CATCHMENT RESPONSEQ2

HYDROGRAPHQ1

FLOODQ1

Abstract

In this study, the influence of temporal variation of RAINFALL on linear-nonlinear response of three mountainous catchments in south west of Iran was examined. At first, the storm events were categorized into two categories including low temporal (LT) and high temporal (HT) heterogeneous events according to their temporal variation. Then, Watershed Bounded Network Model was applied to assess the CATCHMENT RESPONSE influenced by RAINFALL temporal heterogeneity. Three different nonlinear parameters of m=0.50, m=0.61, m=0.77 as well as m=1.0 (linear response) were used. The obtained results indicated that RAINFALL temporal variability plays an important role on the hydrologic response of the catchments.When temporal heterogeneity of RAINFALL was decreased, the response of catchment tended to be more nonlinear and the value of m=0.50 resulted in more appropriate estimation of outlet HYDROGRAPH. However, by increasing temporal heterogeneity of RAINFALL, less nonlinear response of catchment was obtained. The nonlinear value of m=0.61 resulted in the most appropriate simulation of outlet HYDROGRAPHs for high temporal variation events. Moreover, it was found that antecedent wetness of soil has an important effect on the response of catchment so that more nonlinear response can be expected in dry condition of soil rather than wet condition. When the catchment is in wet and saturated conditions due to previous RAINFALL, the nonlinear value of m=0.77 and linear value (m=1.0) can be used respectively.

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APA: Copy

REZAEI SADR, H., AKHOOND ALI, A.M., RADMANESH, F., & PARHAM, GH.A.. (2013). THE INFLUENCE OF TEMPORAL VARIATION OF RAINFALL ON LINEAR-NONLINEAR RESPONSE OF MOUNTAINOUS CATCHMENTS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 20(6), 219-235. SID. https://sid.ir/paper/156135/en

Vancouver: Copy

REZAEI SADR H., AKHOOND ALI A.M., RADMANESH F., PARHAM GH.A.. THE INFLUENCE OF TEMPORAL VARIATION OF RAINFALL ON LINEAR-NONLINEAR RESPONSE OF MOUNTAINOUS CATCHMENTS. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2013;20(6):219-235. Available from: https://sid.ir/paper/156135/en

IEEE: Copy

H. REZAEI SADR, A.M. AKHOOND ALI, F. RADMANESH, and GH.A. PARHAM, “THE INFLUENCE OF TEMPORAL VARIATION OF RAINFALL ON LINEAR-NONLINEAR RESPONSE OF MOUNTAINOUS CATCHMENTS,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 20, no. 6, pp. 219–235, 2013, [Online]. Available: https://sid.ir/paper/156135/en

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