Wind Erosion and Transport

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Presentation transcript:

Wind Erosion and Transport UNIT 5 STANDARDS: STATE OBJECTIVES: NCES 2.1.1, 2.1.3, 2.1.4 LESSON 5

Lesson Objectives In this lesson, you will learn about: Conditions that contribute to wind erosion Identification of wind-formed landscapes How dunes form and migrate The effects of wind erosion on human activities

Wind Erosion and Transport Fast moving winds How does wind move a sediments Suspension Saltation Can carry sediments the same way as water. Wind may move particles by causing them to roll of become airborne and fly. When particles are suspended in the air When the particles bounce along on the ground

Effects of wind erosion Deflation Dust Bowl Abrasion The lowering of the landscape by the removal of soil by the wind. Over time, whole dunes can move. Remember video. 1930’s in Midwest US Wind blown materials act as a sandblaster. It uses abrasive actions to remove material from solid rock.

Wind Deposition Dunes Kuwait 2011 Phoenix 2011 As wind speed and direction change, particles settle out Over time a pile of wind blown sand becomes a dune. Gentle slope is windy side Steeper slope is on side away from wind

Lesson Review What climatic conditions produce wind erosion How does vegetation affect the ability of wind to modify the landscape How do sand dunes form How can wind erosion affect human activity