Across
- 9. The spillage of water over a river’s banks due to heavy rain or snowmelt.
- 13. The removal of salt from seawater to generate fresh water for human use.
- 15. Water that is relatively pure, holding very few dissolved salts.
- 16. A specific spot—such as a factory—where large quantities of air pollutants or water pollutants are discharged.
- 18. The water from precipitation that flows into streams, rivers, lakes, and ponds, and (in many cases) eventually to the ocean.
- 20. Landscaping using plants that are adapted to arid conditions.
- 21. The release of matter or energy into waters that causes undesirable impacts on the health and well-being of humans or other organisms.
- 23. (1) An artificial water body behind a dam that stores water for human use. (2) A location in which nutrients in a biogeochemical cycle remain for a period of time before moving to another of its kind. Can be living or nonliving entities.
- 27. The entire area of land from which water drains into a given river.
- 28. Term describing a water body that has high-nutrient and low-oxygen conditions.
Down
- 1. A water-bearing, porous layer of rock, sand, or gravel that is trapped between an upper and lower layer of less permeable substrate, such as clay.
- 2. Use of fresh water in which the water from a particular aquifer or surface water body either is not removed or is removed only temporarily and then returned.
- 3. A stage of wastewater treatment in which biological means are used to remove contaminants remaining after primary treatment.
- 4. The upper limit of groundwater held in an aquifer.
- 5. A water-bearing, porous layer of rock, sand, or gravel that lies atop a less permeable substrate.
- 6. Use of fresh water in which water is removed from a particular aquifer or surface water body and is not returned to it.
- 7. The region of land over which a river has historically wandered and periodically floods.
- 8. Any water that is used in households, businesses, industries, or public facilities and is drained or flushed down pipes, as well as the polluted runoff from streets and storm drains.
- 10. A diffuse source of pollutants, often consisting of many small sources.
- 11. A system in which the soil is saturated with water and which generally features shallow standing water with ample vegetation.
- 12. An underground water reservoir.
- 14. Term describing a water body that has low-nutrient and high-oxygen conditions.
- 17. Water located atop Earth’s surface.
- 19. A stage of wastewater treatment in which contaminants are physically removed.
- 22. An area where the ground has given way with little warning as a result of subsidence caused by depletion of water from an aquifer.
- 24. A wastewater disposal method, common in rural areas, consisting of an underground tank and series of drainpipes.
- 25. Any obstruction placed in a river or stream to block the flow of water so that water can be stored in a reservoir.
- 26. An area where water infiltrates Earth’s surface and reaches an aquifer below.