National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Most common reason for the waterlogging problem in the agricultural field is absence of an adequate drainage system. The sustainability of farm operations are highly vulnerable due to fluctuations in rainfall. Thus, the estimation of drainage design layout and identification of the vulnerable area for waterlogging are the most vital operations for achieving maximum yield of paddy inland. In this study, the Cypress creek formula’s used for estimating discharge of each plot. By using formula’s for most economical trapezoidal section, sizes of field laterals, sub-main and main drain are designed that provides assistance in making an appropriate plan for removal of excess water from the area. The main advantage of this research investigation is to achieve an optimum level of soil moisture in the area so that the yield of crops could be increased. In order to estimate drainage coefficient for surface drainage 24 hour rainfall require (United State Department of Agriculture Manual) at 5 years recurrence interval, 24 hour rainfall for 5 years recurrence interval was estimated as 230mm. Soil of study area was mainly clay loam. Soil was collected from three different locations. Percentage of clay varied form 29.3-29.8%, Silt 31.1-33.5% and Sand 37.2-39.1% by mechanical sieve analysis. The elevation of the study area varies from 389.5 m to 397m. Mean infiltration rate of study area was found 0.55cm/hr measured by double ring infiltrometer. By using curve number method, weighted curve number estimated for non-paddy area was 89 and for paddy area 95.Runoff calculated by HCS method for paddy area and non-paddy area were 47.2 and 109.4mm respectively. Drainage coefficient for paddy area and non-paddy area were estimated as 0.559 and 1.019 m/day. By using core cutter average bulk density of study area was found 1.51 g/cc. Soil of study area was clay loam so slope of drainage channel kept 0.2% and side slope 1:1.5, permissible velocity was 0.9m/s and design of main, sub main and field laterals are designed for drain excess water from study area.
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