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Stream development and the geologic history of the French Broad River watershed

Stream development and the geologic history of the French Broad River watershed. The Hydrologic Cycle. Runoff. All downhill flow is called runoff What factors influence runoff? 1. 2. 3. What factors influence runoff?. The presence of impervious surfaces (roads, parking lots)

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Stream development and the geologic history of the French Broad River watershed

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  1. Stream development and the geologic history of the French Broad River watershed

  2. The Hydrologic Cycle

  3. Runoff • All downhill flow is called runoff • What factors influence runoff? • 1. • 2. • 3.

  4. What factors influence runoff? • The presence of impervious surfaces (roads, parking lots) 2. Soil type (hard-packed clay forms runoff) 3. Steepness of slope (runoff is faster and more pronounced on steep slopes)

  5. Eastern continental divide

  6. Three ways materials can be carried in rivers: • In solution (particles are completely dissolved) • In suspension (particles are small enough to be swept along in the current) • In bed load (sand, pebbles, small rocks are dragged along the bottom of fast-moving streams)

  7. Sediment is the biggest pollutant in WNC waters. What is its impact?

  8. The Formation of the FBR

  9. FBR began to form 300 mya

  10. New creeks are straight and narrow.They cut deep into the Earth (down-cutting)

  11. Headwaters: The region where water first accumulates to supply a stream

  12. Older streams are characterized by meanders

  13. At a river’s base level (its lowest point), it empties into another body of water.This location is called the mouth of the river.

  14. Major rivers form deltas at their mouths.

  15. How do humans contribute to erosion/sedimentation?

  16. How do humans contribute to erosion/sedimentation?

  17. How do humans contribute to erosion/sedimentation?

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