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Unformatted text preview: 12. ____________ is the boundary line separating adjacent stream drainage basins. 13. The unsaturated zone above the water table is also known as the ____________. 14. Which component of the water cycle describes the recharge of water to the soil and groundwater systems? 15. Highly impermeable layers such as compacted clay or shale are known as ____________. 16. What term denotes the percentage of open space or voids in a material? 17. ____________ is defined as the drop in elevation of the stream surface divided by the distance the water flows. 18. What stream characteristic is measured by the size of the largest particle that a stream can move? 19. A stream flowing into a sinkhole is called a ____________. 20. A ____________ is a circular to elliptical, closed depression in karst areas....
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- Spring '10
- Hydrology, stream, open space