Embankment is not the solution. There is whole presantation about it. It is an adhoc solution and not good for rivers that changes path - like Koshi. Solution is Grid Dam and Interconnecting of river. Like Bharkar Nagal in Punjab, Sardar Sarovar in Gujarat, Krishnaraja Sagar Dam in Karnataka.
But who cares for Biharis !!
Flood is in interest of everyone - contractors,babus, netas. I hope one day they will rise above caste and demand for their due till then learn to swim.
Just to add it is not only north Bihar that is flood hit. Though Ganga has been kinder this time.