What acceleration does the force of earth's gravity produceit varies depending on how long it has been falling.it changes direction every 9.8 meters9.8 m/s/sgravity does not produce an acceleration

If gravity is the ONLY force acting on an object, then the force of
Earth's gravity produces acceleration of 9.8 meters per second²
downward.  That number doesn't change, and it doesn't depend
on the mass or weight of the object.

If there are any other forces acting on the object at the same time,
like air resistance or some other kind of friction for example, then
all bets are off, and we can't say what the object's acceleration will
be in that case.

When the ground is already saturated, it moves downhill as runoff, eventually finding its way into larger bodies of water such as rivers, lakes and oceans. ... Watersheds are defined as the land area from which surface runoff drains into a stream, channel, lake, reservoir or other body of water.