Estimation of peak flood discharge using rational method and Manning equation in Junbedia jorh microwatershed, Bankura district, West Bengal, India

Registration ID: IJNRD_183385

Published ID: IJNRD2210106

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Dr. Subrata Pan, Sri Krishnagopal Halder

Hydraulic Radius, IMD 1/3 Rule, Junbedia Jorh, Manning Equation, Peak Flood Discharge, Rational Method, Runoff Coefficient, Time of Concentration

The present paper deals with the calculation of peak flood discharge by two important hydrological models- ‘Rational Method’ and Manning Equation’ in Junbedia Jorh microwatershed near Bankura town of West Bengal. The study applied ‘IMD 1/3rd Rule’ for calculation of short duration rainfall from daily rainfall data and ‘hydraulic radius’ for calculation of Manning value based on data derived from the field by Auto Level and GPS survey. The result shows that the peak discharge of the jorh during its record rainfall of September, 2021 was 69 m3s-1 rendering the lower part of the catchment more than 12 hours of waterlogging. The Manning equation estimated the discharge at 45 m3s-1 with consequent nineteen hours of waterlogging. It is found that the results so obtained by model estimations have fairly matched with the questionnaire survey results in almost 240 households in the most flood affected area of the catchment.

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Dr. Subrata Pan & Sri Krishnagopal Halder (October-2022). Estimation of peak flood discharge using rational method and Manning equation in Junbedia jorh microwatershed, Bankura district, West Bengal, India. INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT, 7(10), 864-881. https://ijnrd.org/papers/IJNRD2210106.pdf

Volume 7 Issue 10, October-2022

Pages : 864-881

Paper Reg. ID: IJNRD_183385

Published Paper Id: IJNRD2210106

Downloads: 000122254

Research Area: Water Resourses & Management 

Author Type: Indian Author

Country: Bankura, West Bengal, India

Published Paper PDF: https://ijnrd.org/papers/IJNRD2210106.pdf

Published Paper URL: https://ijnrd.org/viewpaperforall?paper=IJNRD2210106

Journal Name: INTERNATIONAL JOURNAL OF NOVEL RESEARCH AND DEVELOPMENT(IJNRD)

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