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 |
The field experiments were conducted to compute the Manning’s roughness coefficient initiated during the flow in lined and unlined watercourses located at the Chhounia field near the field of AICRP on IWM and the Brick field beside the KV, Dr. RPCAU, Pusa (Bihar). The average bed slope of the lined watercourse was found to be 1.5 % whereas that of unlined watercourse was observed to be 0.2 %. . The discharge i.e. rate of water flow was determined in both the lined and unlined watercourses with the help of the weir and the Parshall flume, respectively. The water flow rate in lined watercourse was observed to be 0.0058 m3/sec (5.8 lps) while that at upstream and downstream ends of the unlined watercourse were found to be 0.0068 m3/sec (6.8 lps) and 0.0062 m3/sec (6.2 lps), respectively. The higher depth of flow of0.162 m in unlined watercourse than that in lined watercourse (0.047 m) was observed. The lower cross-sectional area of flow (0.0225 m2) in lined watercourse was observed in comparison of that in unlined watercourse (0.107 m2).The velocity of flow were higher in lined water course (0.269 m/s) than that in unlined watercourse (0.069 m/s). The amount of water lost during the 12 hour operation of unlined watercourse was estimated as 782 litres/day/m2.The average conveyance loss of water flow rate per unit wetted area of unlined watercourse was revealed as 0.0181lps/m2.
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