Sustainable solutions for mitigation of flood and river bank erosion in the Brahmaputra River require a holistic approach involving integrated river management planning and design.
All issues and challenges pertinent to braided behavior, channel migration, horizontal instability, and high sediment load carried by high water discharge are to be addressed through mathematical hydrodynamic, river bed and bank erosion, and sediment transport model studies and satellite imagery data based approaches.
Geomorphic assessment, hydrological data, hydraulic data, geotechnical investigation and GPS survey (topography, cross-section etc,) are to be integrated using Geographical Information System (GIS). The selection of appropriate technology will depend on the collected data for the sites. In addition, watershed or catchment area management impact in the Brahmaputra is to be integrated in the study.
Based on all available information, it appears that there are at least four major geological channel control points along the Brahmaputra in Assam: (1) Bessamora in Majuli, (2) Tezpur, (3) Pandu near Guwahati, and (4) Jogighopa near Goalpara. These points are holding the river around the present alignment. As such, the sustainable solutions will include:
Design of flood control embankment should consider: