No, Uttarakhand was not a man made disaster, because Uttarakhand was an issue of flash flooding, and that is not something humans can control. Of course, the response could have and should have been faster, but responding after the fact is different than who is responsible for causing the flooding in the first place. The flooding is not man made.
I would have to say that Uttarakhad was not a manmade disaster. I mean people that lived there lacked saftey, but braking of a cloud and heavy rain is not a manmade disaster. People have been living on top of mountain for years something like that has happend the first time. So it was not a man made disaster.