Coochbehar, West Bengal, India | Brahmaputra Board – Jalpaiguri Division
Coochbehar is a District under the Jalpaiguri Division of the state of West Bengal, is located just at the foot of the mountain. The rivers arrive here at the plain terrain immediately after coming down of the mountain, so the velocity and energy level of the rivers get dissipated here and results deposition of huge river bed materials on the river bed. It is the common phenomenon of the north Bengal Rivers particularly, of this District Rivers, the beds of the rivers are getting raised due to deposition, it also results meandering of river courses. The rivers change their courses irregularly resulting in loss of land and properties.
To mitigate this problem, The Brahmaputra Board, Jalpaiguri division had proposed bank protection works. The anti-erosion works were implemented along right bank at Bhogdebri and along left bank at Bhajaner cherra, Nishiganj of Mansai River, that has been identified as highly affected zone.
The River Mansai originates from the Bedang Lake in Sikkim. After flowing through Sikkim, Bhutan, Darjeeling and Jalpaiguri districts it enters into Coochbehar district. There are often flash floods on this river due to heavy rainfall and the bed level of river is gradually rising due to heavy siltation resulting in reducing the water carrying capacity of the river and threatened the adjacent area in respect of Flood and Erosion for the last few years.
The Brahmaputra Board has suggested the use of TechFab geotextile bags for the bank protection, which is one of the most practical and viable solutions. The Geotextile bags filled with locally available sand commonly adopted for hydraulic protection works. These geotextile bags are produced from either woven or non-woven polypropylene geotextile or non-woven polyester geotextile. It is cost effective solution largely used in flood protection measures.
The solution was finalized using Geotextile bags for construction of Longitudinal structures which will be permeable, economical and effective in terms of control sedimentation. The main purpose of this structure is to prevent flooding of the adjoining villages and to slow down or stop the shifting of natural water way.
The project was completed successfully. The client was very happy and satisfied with product quality of TechFab India industries Ltd.
