The Netherlands is the lowest country in Europe, they had the same threat, but there are civil engineering solutions that have already been implemented and they seem to work just fine..
True but I don't see Bangladesh employing that method for it's
entire coastline. It'll be too big/expensive a project. I don't think Bangladesh's economy would be able to handle it. Either way, the future is not written in stone yet.
Also, the water level change will be drastic (rise of 50-100 meters in sea level). On the other hand, the
tallest dikes in the Netherlands themselves are only 20-30 meters high.
Netherlands itself has over a century of experience in combating flooding + flood control. It started it's flood controlling projects at the start of the 19th century. Bangladesh on the other hand has no such experience & will likely have to consult overseas engineers, companies & governments for help.
It has been estimated that it costed the Netherlands over $250 billion to make & maintain the dikes since they started a century back. Bangladesh on the other hand has no such money lying around & worse, it doesn't even have a basic plan against floods. 2050 or even 2035 is just around the corner.
Plus, Bangladesh has
way more coastline & river deltas to project barriers over than the Netherlands ever does. Thus increasing the costs of the project(s) exponentially.
Here's a sample of what Bangladesh has to do:-
<Defense of Netherlands
Not only are preliminary barriers enough, secondary and 3rd or even 4th degree barriers are needed. Plus, you have to use pumps to push back the water into the sea/ocean (thus requiring electricity) & adding further to the costs.
Simple example of flood control. The water in between the 1st & 2nd dike has to be constantly pumped out of the artificial lake so that if more water is coming in, the lake will be able to accommodate that, otherwise the water will spill over the dikes and into villages/cities/towns.
^Look how easily a season of heavy rains or the regular monsoons of Bangladesh can easily tip the water over this barrier above.
Talking about monsoons, the Netherlands doesn't even face
that while Bangladesh
does.
Simply put, the Bengalis & their hired engineers will have to
also take into account the annual rainfalls, torrential rains, regular/sporadic floods & monsoons. They will have to make dams, reservoirs, etc thus further adding to the cost.
I suspect that the project(s) will be above $500 billion. Much over Bangladesh's capacity.
The only viable reason I see for Bangladesh is to reunite itself with Pakistan (literally or just economically) and have it's butt saved in the future.
P.S> Sorry for the long topic derailing post. But I have a Ph.D in Environmental Science (actually no, just studied it thoroughly grades 11-12th) .
Hawaii is a good choice for vacations..
Thank You