24Sep 2017

ESTIMATION OF SEDIMENT YIELD OF SONAI RIVER USING SEDIMENT RATING CURVE AND GEOGRAPHIC INFORMATION SYSTEM.

  • Department of Civil Engineering, National Institute Of Technology Agartala, India.
  • Department of Civil Engineering, National Institute of Technology Silchar, India.
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The aim of this research is to estimate sediment yield in Sonai River by sediment rating curve and an empirical formula. The study has been carried out to determine and impose sediment yield in the Sonai River in Assam to be able to estimate average annual sedimentation during the period of 2003 to 2005. Measurement data of daily suspended sediment concentration and water discharge is obtainable during 3-year period (2000-2002) in the Tula gram station of Sonai River. Data were collected from Central Water Resource Commission, Shillong. These data sets, such as daily mean water discharges and daily mean suspended sediment discharges were used to develop sediment rating curves for small periods of time. Once the rating curves for water discharge and sediment concentration Were defined, they were used with daily water discharge data to predict monthly and annual sediment yield of Sonai river during 2003-2005 and by this rating curve calculated sediment yield is 26.08ton/ha/year where observed sediment yield is 25.05 ton/ha/year which is near to the calculated value. For the judgments of accuracy of the result another method for determined sediment yield is empirical method (Dendy Bolton formula, 1976). Runoff and area of watersheds is used in this formula of sediment yield. Runoff is calculated from SCS-CN curve number method and Area of watershed is developed by ARC GIS .By this empirical method the average annual sediment yield during 2003 to 2005 is 31.07 ton/ha/year. So from these two processes sediment yield determined by sediment rating curve is more accurate than the empirical method


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[Sadria Begam and A. K. Barbhuiya. (2017); ESTIMATION OF SEDIMENT YIELD OF SONAI RIVER USING SEDIMENT RATING CURVE AND GEOGRAPHIC INFORMATION SYSTEM. Int. J. of Adv. Res. 5 (Sep). 994-1000] (ISSN 2320-5407). www.journalijar.com


Sadria Begam -Assistant professor ,Nit Agartala Prof


DOI:


Article DOI: 10.21474/IJAR01/5415      
DOI URL: http://dx.doi.org/10.21474/IJAR01/5415