GES Study Guide Exam 4

# The maximun size particle the stream is capable of

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· The maximun size particle the stream is capable of transporting · Size of particle varies with the 6th power of the ratio of increase of speed Example: What size particle can be carried by a stream moving 4mph if it can transport 0.25g particles at 2mph? speed doubles

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2 6 x 0.25g What if the speed increases to 7mph? 7mph is 3.5 times 2mph: 3.5 6 x 0.25g = 1838 x 0.25g = 460g ! 14. Know how the three primary factors listed below determine the amount of material that can be picked up and transported by a stream. Volume Velocity Load 15. Be able to define: stream basin interfluve watershed 16. Understand the method by which stream order is determined. 1st order streams have no tributaries To go to the next higher order two streams of the same order must join 17. Understand the stages of landscape development as they relate to the denudation processes of stream erosion. Youthful Mature Old Age Peneplain 18. Know what is meant by the terms: T emporary base level Ultimate base level, Knickpoints The point in which the water goes down and flows via Rapids, waterfalls 19. Be able to describe the following kinds of streams: Perennial- Permanent, flow year-round Adequate groundwater supply all of the time Intermittent
Flow for only part of the year Groundwater supply available during only part of the year Ephemeral Flow only during and immediately after a rain Exotic - Nile River, Colorodo River 20. Be able to explain the two primary functions of streams as discussed in class. cut vertically into the landscape • The river cuts vertically into landscape • Runoff from valleys and mass wasting transport eroded material to river transport material • The river acts as a conveyor belt to transport eroded material As river continues to cut vertically into landscape the valley widens as more material is removed This process produces a V-shaped valley 21. Understand how the ability of a stream to move a maximum size particle increases by the 6th power of the increased stream velocity. Be able to make this calculation. 22. Know how the following landforms are developed. oxbow lakes natural levees 23. Understand how the dynamics of meander migration affects the features in a stream valley. Straight streams- uncommon Senuous snake motion- common Meandering- extreme snake shapes Braided
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