Water Crossword

3. an area of coastal grassland that is regularly flooded by seawater
8. which is pollution discharged from a single source
11. a tree or shrub that grows in chiefly tropical coastal swamps that are flooded at high tide
12. a fence or other obstacle that prevents movement or access
14. Water that is safe to drink
15. a ridge of rock in the sea formed by the growth and deposit of coral
17. Non free floating organisms
18. is the part of a sea, lake or river that is close to the shore
20. land consisting of marshes or swamps; saturated land.

1. a structure built across a river to control the river’s flow
2. several processes that remove some amount of salt and other minerals from saline water
4. a method of providing plants with water from sources other than direct precipitation
5. Organisms that live at the bottom
6. Free floating organisms
7. the introduction of chemical, physical, or biological agents into water that degrade water quality and adversely affect the organisms that depend on the water
9. excessive richness of nutrients in a lake or other body of water
10. ecological region at the lowest level of a body of water
13. formed behind the dam
16. organisms that cause illness or disease
19. he tidal mouth of a large river, where the tide meets the stream