I think you mean the difference in the treatment of surface water and well water. Surface water will have more solids in it (dirt, grit) as well as disolved minerals. Well water comes from underground and the earth itself acts as a filter and has already removed most of the solids. Both are aeriated (part of taste and odor control). If iron is present in the water it will oxidize. Chemicals are added that make the iron and solids larger and heaver. These solids are then allowed to settle to the bottom and the clearer water drawn off. Disinfectants (ozone or chlorine) added to kill bacteria is added in several points of the process. The water is then filtered (surface water requires a longer filter time than well water). Water is then stored until needed for pumping into the elevated tanks.
Surface water collects in a watershed and seeps into ground
Surface water collects in a watershed and seeps into the ground
By which grain it comes from, and how finely ground it is.
The wind at the surface of the ground where the molecules are having friction is moving slower than the wind above the surface.
it will be slower near the surface
intrusive:below ground extrusive:at the surface
Wind at the surface is slower than the "winds aloft" The biggest effect is within a few inches of the ground.
Friction between the ground and air molecules slows down the air at the surface, creating a drag force. This drag force can influence the direction and speed of wind patterns near the surface.
Between ground and tires and between brake pads and moving surface.
Wind at the surface is slower than the "winds aloft" The biggest effect is within a few inches of the ground.
desert regions -------------------- a drought.
When a ball bounces on the ground, it demonstrates the interaction between the ball and the ground through the transfer of energy. The ball compresses when it hits the ground, storing potential energy. This energy is then released as the ball rebounds off the ground, showing the exchange of forces between the ball and the surface it bounces on.