It is forced to flow downhill by the Earth's gravity.
Water running downhill is the major agent of erosion.
Runoff is the water flowing downhill across the surface of the Earth.
I think water will stop running downhill when there is no more water or when the hill goes up!
Water flowing downhill across the surface of the Earth is called runoff.
Rivers, lakes, canals, even sewers are bodies of water that flow downhill in a channel.
Water flows downhill, and the topography of that region just happens to be downhill to the east.
Downhill.
Downhill.
runoff
Gravity
The general direction a river flows is down. The water responds to the pull of gravity, and it is pulled down - whichever way that happens to be (north, south, east, west, or whatever). Water flows downhill. Simple and easy. Nothing tricky about it.
When water flows downward what will it posses