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Title
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Development of an Analytical Method for Estimating Manning’s Coefficient of Roughness for Border Irrigation
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Type
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JournalPaper
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Keywords
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Design, Water Depth, Irrigation Advance Phase, Operation, Surface irrigation
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Abstract
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An analytical relationship was developed for determining Manning's roughness coefficient (n) for border irrigation. Manning's n is considered as a function of border length and its value at each point of the border is regarded as a function of the variation in water depth. The proposed relation was evaluated for 12 irrigation events at three farms and using WinSRFR software. Results showed that Manning's n computed using the proposed relation had an error of less than 2% compared to the coefficient obtained by the WS software. The proposed relation was sensitive to the exponent in Kostiakov– Lewis’s infiltration equation and to inflow into the border
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Researchers
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vijey p. singh (Fourth Researcher), Eisa Maroufpoor (Third Researcher), Amir Panahi (Second Researcher), Amin Seyedzadeh (First Researcher)
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