Well I've read the article, posted by Roy. It seems the same conclusion has been made repeatedly in a loop. Although it has been claimed before that the project
shall be a “run-of-the-river” type dam but it seems
it shall regulate flows.
Now the difference between Farakka and tipaimukh is
that the former diverts the water through feeder canals
which the author admits claiming indias unethical
practice, this shall rather have to discharge water
through Bangladesh. Such as the three gorges dam
What are the consequences then? Shruma river
originates from Barak and goes through Hakaluku Haor.
Because of distraction in the cycle of Haor the ecosystem of that region shall be destroyed.
This Haor is an internationally protected Ramsar site.
One of asias largest marsh wetland resources. Atleast
5 -10 lac population directly/indirectly depends on this ecosysytem, they shall be ruined.
In the following picture I have marked the Haor on left and the dam on right, notice the difference in scale.
Although water level will rise in dry season and excess water in rainy season will be diverted the author does not calculate the loss of water due to greater surface area upstream by evaporation and silt formation downstream resulting some net loss.
Similarly to fill up the reservoir it will take 5-6 years, by that time Haor will be lost due to reduction in flow and people shall blame it on the authorities.
Anyways there needs to be more investigations as
the whole proposal seems hollow, I couldn't even find how much area shall submerge upstream to perceive the time frame in reduction flow.
My conclusion is, just because it generates only 1500mw
this project shall bring more problems then solutions.