Human Causes of Flooding - River Management

The main aim of river management is to reduce the likelihood of flooding. However, in some circumstances it can actually increase the risk:

Bangladesh: flood embankments have built along some river channels. They are designed to increase river capacity but at times have prevented floodwater draining back into the rivers

Farakka Dam, India: Lots of rainfall, meant the lake behind the dam could burst. The floodgates of the dam were opened. This stopped the dam from bursting but it greater increased the discharge of the river in Bangladesh. This coincided with the normal floods and made the severity much worse

Reference:  http://www.acegeography.com/causes-of-flooding.html