1. 6.2 The Work Of Streams

2. Bed Load Sediment that carried by a stream along the bottom of its channel.

3. Capacity The total amount of sediment a stream is able to transport.

4. Alluvium Alluvium is the sorted material deposited by as stream.

5. Delta Delta is an accumulation of sediments formed where a stream enters a lake or ocean.

6. Natural Levee Natural Levee is a landform that parallels some streams.

7. Floodplain The flat, low-lying portion of a stream valley subject to periodic flooding.

8. Flood Occurs when the discharge of a stream becomes so great that it exceeds the carrying capacity of its channel and overflows its bank.

9. Drainage basin The land area that contributes water to a stream.

10. Divide An imaginary line that separates the drainage of two streams often found along ridges.

11. Key Concepts How do streams erode their channels? What causes floods? What is the relationship between stream and a drainage basin? How do streams transport sediments?

12. How Does streams erode their channels? Streams generally erode their channels lifting loose particles by abrasion grinding, and dissolving soluble material.

13. What causes floods? Most floods are caused by rapid spring snow melt or storms that bring heavy rains over a large region.

14. What is the relationship between stream and a drainage basin? Every stream has a drainage basin, A drainage basin is the land area that contributes water to a stream.

15. How do streams transport sediments? Streams transport sediment in three ways In solution In suspension Scooting or rolling along the bottom