Bank Shifting of River Ganga in the Downstream of Bhagalpur Vikramshila Setu
Journal Title: Journal of River Engineering - Year 2014, Vol 2, Issue 4
Abstract
Ganga River, downstream Vikramshila Setu (Bhagalpur, Bihar), is shifting towards its right bank with great effect. Right bank of Ganga is densely populated and has many important structures. In last ten years, riverbank of the Ganga downstream of the bridge was changed by more than 1000 m. Due to the right bank shifting of Ganga; Bhagalpur city under risk of submergence in flood seasons. Bank protection strategies are required immediately at this place. Form the study of satellite image of 1988 and 2006 using ARC-GIS, it was found that there is significant amount of bank shifting occurred during this period. In Bhagalpur, major city population residing on right bank of Ganga, so right bank of Ganga is the main area of concern in this particular study. USGS images (1988 and 2006) analysis clearly indicates that in upstream of Vikramshila Setu; right bank Ganga is almost intact. Downstream of Vikramshila Setu was getting more erosion than upstream. Rate of erosion was found to be more in between 2003 & 2011 in comparison with 1988 & 2006 satellite image study. Contribution of bridge (Commissioned in 2001) to downstream erosion cannot be ignored directly. At the point around 3.5 km downstream of Vikramshila Setu 1100 m erosion in past 8 years (2003-2011) with respect to 720 m erosion in previous 18 years(1988-2006). Rate of erosion was determined more than twice.
Authors and Affiliations
Harinarayan Tiwari - Nayan Sharma
Keywords
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