Evaluation and recommendations for river bank protection at Faridpur District Town – Padma River, Bangladesh
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Major rivers in Bangladesh are characterised by having rapidly shifting river channels creating deep scour holes. Scour holes are filled by rapid deposition of sand after the floods. River banks can be under attack in a given year and or be remote from eroding currents in the next year or even for the next decade.
Attempts to stop locally bank erosion in major rivers have completely or partially failed at several locations. Failure is due to physical factors like high currents, waves, scouring and instability of the banks, but also to poor construction and maintenance. In other cases the structures appear to function good but they might not yet been exposed to the full environmental design loads.
The objective of the technical assistance mission is the following:
- To update and evaluate present and potential future developments in the planform of the Padma River, between Aricha and Mawa. To forecast the short, medium and long-term bank line development along specific critical areas (special area of interest is Faridpur District and Faridpur Town).
- To evaluate the stability of the banks and presence of control points in relation to the alignment of the river channels, future flood and currents and the risk of further development of the southern channel and attack to Faridpur Town.
- To make a forecast of potential future planform changes (medium and long-term) and bank erosion trends. Scenarios of right bank line alignment in future if nothing is done in short time. This will include the analysis of works done by the BWDB in the last year. Identify priority areas that will be threatened in short time and where control of erosion is urgently needed
- To recommend urgent measures to control erosion and stop possible immediate attack of the Padma River on Faridpur Town.
- To advice the Bangladesh Water Development Board (BWDB) on the type of works to be constructed (temporary and/or permanent), monitoring and maintenance required to ensure sustainability.
In order reach these objectives data and previous studies were collected, reviewed and evaluated and site visits were carried out. Assessments of past, present and future bank erosion of the Padma River near Faridpur were made and recommendations for bank erosion protection works, planning, design and construction and technical assistance were made.
An outline for an Integrated River Bank Erosion Management Project has been prepared to develop an Integrated River Bank Erosion Management Plan for all main rivers in Bangladesh. |
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