There isn't a formal internal upgrade process at IIT Guwahati after all COAP rounds for changing branches.

COAP (Committee on Applied Sciences Programs) is a centralized allotment system ensuring transparency and fairness. Once you have accepted and frozen your seat, it's unlikely to be reopened for internal upgradation.

IIT Guwahati has a specific number of seats allocated for each program. Upgrading you to Geotechnical Engineering might take away a seat from someone who might have preferred it during COAP.

Contact the Department of Civil Engineering at IIT Guwahati. Explain your situation and inquire if there's any exceptional circumstance where an internal transfer might be possible (highly unlikely but worth a try).

While you can't switch branches now, keep these options in mind for the future After completing your B.Tech in Water Resources Engineering, you can pursue an M.Tech in Geotechnical Engineering at IIT Guwahati or other institutes. This would allow you to specialize in Geotechnical Engineering.


https://www.careers360.com/university/indian-institute-of-technology-guwahati

I hope it helps!