'Sitting Duck' Vocabulary

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Across
  1. 2. size
  2. 5. wetland
  3. 7. to add later
  4. 8. chance of happening
  5. 10. extreme amount of water
  6. 13. manmade roads,drains or natural landscape
  7. 14. to make less or better
  8. 16. areas to hold stormwater
Down
  1. 1. built up energy
  2. 3. cannot penetrate
  3. 4. ability to contain
  4. 6. water scientist
  5. 9. weakens
  6. 11. all in one piece, not broken
  7. 12. to retain or hold
  8. 15. downpour of rain