Across
- 4. drinkable
- 5. a river and the collection of its tributaries
- 7. flat land subject to periodic flooding
- 8. volume of water flowing past a given point
- 12. surface water moving through cracks and pore spaces
- 14. saltwater contamination
- 15. unending circulation of Earth's water supply
- 16. stream emptying into another stream
Down
- 1. flood control measure
- 2. ability to transmit water though pore spaces
- 3. sinking of land due to loss of groundwater
- 6. accumulation of sediment where a river enters an ocean
- 9. permeable rock layers that hold ground water
- 10. land area contributing water to a river
- 11. water within soil and rock
- 13. percentage of pore spaces