Environmental science

5. occurs when harmful substances—often chemicals or microorganisms—contaminate a stream,
6. any source of water pollution that does not meet the legal definition of "point source" in section
7. An ecosystem service is any positive benefit that wildlife or ecosystems provide to people. The benefits can be direct or indirect—small or large.
8. a measure of the ability of a material (such as rocks) to transmit fluids.
12. the highest point in an aquifer from wheel water can be obtained
14. water pollution that comes from a single, discrete place, typically a pipe.
15. the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration.

1. is water that exists underground in saturated zones beneath the land surface. The upper surface of the saturated zone is called the water table.
2. the volumetric flow rate of groundwater through an aquifer.
3. a cavity in the ground
4. manmade processes or natural processes enhanced by humans that convey water
9. an underground layer of rock, sand, or gravel that holds groundwater a source of well and spring water
10. the amount of space between particles in a substance
11. the branch of geology concerned with water occurring underground or on the surface of the earth.
13. the action or process of filtering something.