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Development of Daily Rainfall Erosivity Model for Dehradun, Uttarakhand, India

Author : Javed Ali

Pages : 3222-3227
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The main objective of present study was to develop an erosivity model for Dehradun district of Uttarakhand State of India to estimate the erosivity index values and to find the most effective relationship between erosivity index and daily rainfall values for Dehradun. Two types of relationships viz. linear and exponential relationships between erosivity index and daily rainfall values have been developed in this study. The relationships are: Linear relationship: EI30 = 17.2410 P – 305.09 (R2 = 0.987185), Exponential relationship: EI30 = 0.569 P 1.702 – 0.00065 (R2 = 0.968175). The performance of the models was also evaluated using statistical indices such as absolute prediction error and coefficient of efficiency. From this study, absolute prediction error was found to be 13.09 % and 19.58 % for linear and exponential relationship respectively. Coefficient of efficiency was found to be 99.24 % and 98.54 % for linear and exponential relationship respectively. Both the developed models are valid for Dehradun region. However, the linear model was found to be better on the basis of evaluation criteria. The model developed by Central Soil and Water Conservation Research and Training Institute is not applicable as per the recent trend of rainfall pattern for Dehradun.

Keywords: Daily rainfall erosivity model, Soil conservation, Erosivity index, Dehradun.

Article published in International Journal of Current Engineering and Technology, Vol.5, No.5 (Oct-2015)


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