Maksum, a resident of Aceh Tamiang district in northern Sumatra, Indonesia, can still vividly recall when a flash flood hit the area 11 years ago this month.The 2006 disaster left a trail of destruction in its wake, claiming the lives of 28 people and forcing more than 200,000 from their homes.Today, he is increasingly concerned that a similar catastrophe looms on the horizon – one driven not by natural forces, but by a massive hydroelectric power plant planned for construction here.The 428-m