i think most people on this thread needs to do little more research on the hydropower and besides being rich in it, why Nepal still lurks in darkness???

Nepal has ~ 6000 big and small streams and many are snow or monsoon fed. Nepal has a capacity of ~85,000 MW but currently we are tapping less than 0.05% of it. So do the math.

Many factors have led to unsucessful attempts to extract more power from its rivers and some factors include physical barrier, weak govt., corruption and political instability. You can add more factors if you know. Don't just arite anything that comes right off of your butt.

Having said this, I do  not know everything but do know some to say above facts.