Analysis differs. While the administration insists that it was a natural calamity, environmentalists hold that this was a man-made disaster waiting to happen.
The debris raises the water level in the river which leads to flash floods when it rains heavily. During monsoon such floods have become very common and cause a lot of destruction. A large number of trees are also cut for these projects, causing soil erosion and leading to massive landslides.
More than 220 power and mining projects are running in 14 river valleys in Uttarakhand. Several rivers are being diverted through tunnels for these projects leading to major disasters in the state.