Research Funding: Local Government Engineering Department (LGED)

Faculty Researcher: Prof Dr M Shahjahan Mondal, Md Shadman Sakib

Collaboration: Lead: Institute of Water and Flood Management (IWFM), BUET

Duration: January, 2022 - December, 2023

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The research project will study the Monitor morphological changes, such as bank lines, thalweg, confluence, flow, water level, and sediment, of the Feni River near the proposed LGED bridges sites to connect Mirsharai and Sonagazi Economic Zones. One bridge (650 m long) is on the Feni River, and another (245 m long) is on the Old Feni River. The proposed 650 m bridge is on a newly excavated channel, showing a widening tendency. There is evidence of erosion at both banks of the river. Since this is a new channel, it may deepen with time. Hence, the current Feni River may develop a meandering pattern with time and threaten the proposed bridge and bank protection structures. Also, the proposed site is just upstream of the confluence of the new and old channels. This confluence, downstream of the proposed bridge is also showing erosion. Therefore, the investigation will analyze the monitored data to assess potential threats of such changes on the proposed bridges and river training structures. In addition, it aims to communicate and suggest any impending risk to the proposed bridges and consequent mitigation measures.