Floods

4. The rise and fall of sea levels.
8. An unclean environment, often containing harmful substances.
9. A barrier constructed to contain the flow of water
10. A structure in which water is collected.
14. A message of cautionary advice or the informing of danger.
15. Another word for rain.
16. A small narrow river
18. A large body of water (normally freshwater) surrounded by land.
20. The inner part of a country.
22. A small flood causing a small amount of damage.
24. A small body of water separated from a larger body of water by a reef or sand.
26. A large body of water accounting for 71% of the Earth’s surface.
28. A government branch which predicts weather patterns (BOM).
30. The composition of a surface and its features.
31. More than necessary.

1. Level of intensity.
2. A winding river.
3. Areas where rivers are steeper and flow more quickly into rivers draining to the coast.
5. A sudden flood.
6. A group of people who reside in a specific area.
7. A substantial flood causing an extensive amount of damage.
11. An intense, low pressure storm with heavy winds that is developed over warm, tropical oceans.
12. A branch of a river formed from the main stream only when the water level is high.
13. Murray ______, Darling ______.
17. Quantity of water in a material such as soil.
19. The system by which a community is ruled.
21. A large flood causing evacuations, extreme amounts of damage.
23. A raised wall to hold back or carry water.
25. A scientific term for water cycle.
27. A flat area next to a river that is naturally subject to flooding.
29. Flooding of rivers in the vast flat areas.