This paper presents results of small scale model studies on bifurcation of River Damodar at Beghor Mukh/Beguahana, Burdwan, West Bengal. The river abruptly changes its course at Pallar and bifurcates at downstream in two channels at Beguahana in Burdwan district, West Bengal as Mundeswari and Lower Damodar. During lean period, lower Damodar (Amta cannel) carries main discharge but during monsoon high discharge (approaching 100,000 cusecs) is carried by Mundeswari. So Mundeswari becomes the main carrier and about 70% of discharge passes through it, and the remaining passes through lower Damodar. Mundeswari River and lower Damodar affect around 4.61 lakh people and 0.335 lakh hectare (335 km2) of cropped area annually due to flood-related inundation. In the present research, an attempt has been made to evaluate the hydraulic behavior of the lower Damodar and Mundeswari rivers downstream of Beguahana, in terms of the percentage sharing of discharges through these two rivers with sediment and bed load transport in the main river. The small scale river model with bifurcation, made for this study, has been operated for different discharges without bed load and corresponding data for discharge distribution and sediment transport (bed load and suspended load) transport have been observed.

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Model Study on Bifurcation of River Damodar at Beguahana, Burdwan, West Bengal

  • Adrita Chowdhury,
  • Partha Basu,
  • Sibapriya Mukherjee,
  • Rajkumar Banerjee,
  • Bibhas Chandra Barman

摘要

This paper presents results of small scale model studies on bifurcation of River Damodar at Beghor Mukh/Beguahana, Burdwan, West Bengal. The river abruptly changes its course at Pallar and bifurcates at downstream in two channels at Beguahana in Burdwan district, West Bengal as Mundeswari and Lower Damodar. During lean period, lower Damodar (Amta cannel) carries main discharge but during monsoon high discharge (approaching 100,000 cusecs) is carried by Mundeswari. So Mundeswari becomes the main carrier and about 70% of discharge passes through it, and the remaining passes through lower Damodar. Mundeswari River and lower Damodar affect around 4.61 lakh people and 0.335 lakh hectare (335 km2) of cropped area annually due to flood-related inundation. In the present research, an attempt has been made to evaluate the hydraulic behavior of the lower Damodar and Mundeswari rivers downstream of Beguahana, in terms of the percentage sharing of discharges through these two rivers with sediment and bed load transport in the main river. The small scale river model with bifurcation, made for this study, has been operated for different discharges without bed load and corresponding data for discharge distribution and sediment transport (bed load and suspended load) transport have been observed.