Development of Rainfall Intensity-Duration-Frequency Curves for Saleran Watershed in the Shivalik Foothills of Punjab
Development of rainfall curves
200
Authors
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Gurnaz Singh Gill
Department of Soil and Water Engineering, Punjab Agricultural University, Ludhiana-141 004
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Anil Bhardwaj
Department of Soil and Water Engineering, Punjab Agricultural University, Ludhiana-141 004
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Sanjay Satpute
Department of Soil and Water Engineering, Punjab Agricultural University, Ludhiana-141 004
Keywords:
IDF curves, Rainfall duration; Rainfall frequency; Rainfall intensityAbstract
Accurate and current rainfall characterization is an important tool for water-related system design and management. Rainfall intensity-duration-frequency relationship and nomographs are required for designing soil and water conservation structures. In this study, the rainfall intensity–duration–frequency (IDF) relationships were developed for Saleran watershed at Shivalik foothills. The raingauge charts of 10 years (1987-1996) were analysed to get rainfall depth and rainfall intensities for different durations (10, 15, 30 and 60 minutes). The maximum rainfall intensities with 5, 10, 15, 20 and 25 years return periods were found varying from 90 mm h-1 to 150 mm h-1 for 10 minutes, 66 mm h-1 to 130 mm h-1 for 15 minutes, 58 mm h-1 to 98 mm h-1 for 30 minutes and 37 mm h-1 to 80 mm h-1 for 60 minutes duration. The coefficient of determination (R2) for the developed power model varies between 0.987-0.998 which showed good relation between maximum rainfall intensity and the return period.
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References
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