1. The melted water of glaciers, e.g. the Rhone in France;
2. A lake, e.g. the Nile has its source from Lake Victoria;
3. A spring, e.g. The Thames in England;
Running water may finally discharges into:
The sea, e.g. the Niger discharges its water into the Atlantic Ocean.
A lake, e.g. the Rivers Hadejia and Yedseram are among the several rivers discharging their water into Lake Chad.
Running water does three types of work: it erodes, it transports and it deposits.