Floods

Floods have been a serious environmental hazard for centuries.however the havoc raised by rivers overflowing their banks has become progressively more damaging as people have deforested catchmenrs and intensified the use of river flodd-plains that once acted as safety valves.The wetlands in flood -plains are nature's flood control systems in to which overfilled rivers could spill and they act like a temporary sponge holding the water,and preventing fast-flowing-water from damaging th esurrounding land.

Deforestation in the Himalayas causes floods that year after year kill people,damage crops and destroy homes in the Ganfes and its tributaries and Brhma putra,Rivers change their course during floods and tons of valuable soil is lost to the sea.