What Is a Watershed?
Raindrops fall. Some soak into the ground. Some join with other
drops and trickle down slopes. The trickles join to form streams.
These streams connect to make rivers. Rivers then make their
way to the sea.
All the land drained by a stream and its branches, or by a river and its streams, is called a watershed.
Scientists study watersheds to learn how much water is available
to meet people's needs. The topography -- the physical appearance
of the land -- along with the plants, the soil, the rock formations
and the climate, all affect the water in a watershed. 
|
|
