Across
- 1. land area that delivers runoff, sediments and dissolved substances to a lake or river
- 3. a prolonged period in which precipitation is at least 70% lower
- 4. area adjacent to a stream in which water enters from overflow
- 5. type of lake that has a small supply of nutrients
- 8. area where a river meets the sea
- 9. area of ocean needed to sustain the fish consumption of a person, nation, or world
- 10. a concentration of a particular wild aquatic species suitable for commercial harvesting
- 11. an artificial lake
- 13. areas of ocean partially protected from human activities
- 17. (2 words) specific sources of pollution that are relatively easy to identify
- 18. type of lake that has a large supply of nutrients
Down
- 1. (2 words) top of the groundwater zone
- 2. (2 words) broad and diffuse areas from which pollution enters water
- 6. water that percolates through soil until rock stops it
- 7. underground caverns and porous layers of sand, gravel, or rock through which water flows
- 12. structure built across a river to control its flow
- 14. (3 words) the aquatic version of biomes
- 15. natural nutrient enrichment of a body of water
- 16. type of water that flows across the earth's land