Answer:
In order to make the most of Nepalese water resources, many hydropower plants should be built. These hydropower plants would be built at several parts of the Nepalese waterways, always making sure that the enviromental impact is a small as possible.
This higher hydropower capacity would give Nepal an energy surplus that could be exported to other countries, for example: China and India, which are huge countries with very large populations and economy, and that are always seeking for new sources of energy because of that.