ESTIMATION OF DRAINAGE COEFFICIENT USING HYDROLOGICAL DATA FOR PUSA FARM AREA

P.K. PASWAN¹*, I.B. BHAGAT², DEEPAK KUMAR^3
1Department of Soil and Water Conservation Engineering, College of Agricultural Engineering and Technology, Junagadh Agricultural University, Junagadh, 362001, Gujarat
²Department of Irrigation and Drainage Engineering, College of Agricultural Engineering, Dr Rajendra Prasad Central Agriculture University, Pusa, 848125, Bihar
³Department of Soil and Water Conservation Engineering, College of Agricultural Engineering and Technology, Junagadh Agricultural University, Junagadh, 362001, Gujarat
* Corresponding Author : pappu.nk1995@gmail.com

Received : 27-04-2018     Accepted : 07-05-2019     Published : 15-05-2018
Volume : 10     Issue : 9       Pages : 5911 - 5916
Int J Agr Sci 10.9 (2018):5911-5916

Keywords : Drainage Coefficient, Crop growth and yield, Agro-climatic Condition
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Dr Rajendra Prasad Central Agriculture University, Samastipur, Pusa, 848125, Bihar, India
Author Contribution : All author equally contributed

Water logging is a severe problem, which affects crop growth and yield in those areas where the concentration of rain is low. Water is harmful to crop growth in excess as well as in deficit, resulting in problems such as water stress during critical periods of crop growth, water logging, salinity and pollution. About six million hectares of land in India is water logged and half of this area has problems of salinity. In Northern Bihar about one million hectares of land is water logged. A large part of the water-logged portion is located in area where canal irrigation has made rapid progress. The problem of water logging in low land area is due to inadequate provision of outlets. In the light of above circumstances, the low-lying area of Pusa Farm has been undertaken for a case study. In this paper, hydrological data of Pusa farm area has been analyzed and Drainage coefficient was determined. From Results, it was found that Pusa Farm represented a typical low lying area of North Bihar considering of medium, low and deep lands. The medium land was water logged for a period of 3-4 months, whereas low land remains water stagnation for a period of 5-6 months. The maximum expected rainfall at 60%, 70% and 80% probability levels has been computed and found that it varies from 122.00 mm to 322.00 mm for different consecutive day’s durations. Drainage coefficient was found to be decreased with the duration of rainfall. It was found maximum, 46.63 cm/day for one day minimum 13.64 cm/day for seven days duration of rainfall. Since, Paddy is the principle crop of low land area so the drainage coefficient evaluated from seven days duration of rainfall can be recommended to consider for design of drainage system

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