Unit 4: Agents of Erosion
description
Transcript of Unit 4: Agents of Erosion
![Page 1: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/1.jpg)
UNIT 4: AGENTS OF EROSION
![Page 2: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/2.jpg)
UNIT BIG IDEA/ESSENTIAL QUESTIONS Water and wind are active agents of erosion
that constantly reshapes the earth’s surface. Essential Questions
How does porosity, permeability, aquitards, and aquifers influence groundwater?
What conditions would create karst topography? What importance does deltas have? How can glaciation erode, alter, and reshape the
earth’s surface?
ES Standards: 3.1, 3.4, 3.5
![Page 3: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/3.jpg)
KEY VOCABULARY Alluvial fan Delta Drainage basin Infiltration Karst topography Meander Natural levee Oxbow lake Permeability Porosity
Alpine glacier Arete Cirque Deflation Drumlin Moraine (lateral,
medial) Till Zone of accumulation Zone of wastage
![Page 4: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/4.jpg)
RECAPWeathering-process that breaks
downs materials (chemical and/or mechanically) at the earth’s surface.
Erosion- removes weathered material by wind and water.
Deposition- deposits eroded material in a new location making new features
![Page 5: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/5.jpg)
QUESTION OF THE DAY
What is the hydrological cycle?
![Page 6: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/6.jpg)
![Page 7: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/7.jpg)
WATER Infiltration depends on
Intensity/duration of rainfallPrior wetted condition of soilSoil textureSlope of the landNature of vegetative cover
What is a Drainage Basin? River Systems
3 parts: zone of erosion, zone of sediment transport, zone of sediment deposition
![Page 8: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/8.jpg)
![Page 9: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/9.jpg)
STREAMFLOW Laminar or Turbulent
Which type of flow is responsible for whitewater rapids?
Stream Velocity is based uponGradientShape, size, and roughness of
channelDischarge
Width x depth x velocity
![Page 10: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/10.jpg)
![Page 11: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/11.jpg)
TRANSPORTATION OF ERODED MATERIAL Dissolved load, Suspended Load, Bed Load
Competence determines the maximum size of particles that can be carried
Capacity is based upon a streams discharge
Stream ChannelsBedrockAlluvial
Meanders, Oxbow Lakes, Cut banks and Point bars
Stream Valleys
![Page 12: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/12.jpg)
![Page 13: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/13.jpg)
![Page 14: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/14.jpg)
![Page 15: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/15.jpg)
DEPOSITIONAL FEATURES Floodplains Delta Levees Alluvial Fans
![Page 16: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/16.jpg)
![Page 17: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/17.jpg)
QUESTION OF THE DAYWhat are some ways to control flooding?
![Page 18: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/18.jpg)
GROUNDWATERRate of movement and amount
depends onPorosityPermeabilityAquitardsAquifers
![Page 19: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/19.jpg)
![Page 20: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/20.jpg)
GLACIATION Two types Glacial Movement
Zone of accumulation Zone of wastage
Erosion by plucking and abrasion
![Page 21: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/21.jpg)
![Page 22: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/22.jpg)
GLACIAL FEATURES VIA EROSION Glacial Trough Hanging Valleys Cirques Aretes Horns Fjords
![Page 23: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/23.jpg)
![Page 24: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/24.jpg)
DEPOSITIONAL FEATURES Till vs. Stratified Drift Glacial Erratics Moranines Outwash Plains Drumlins Eskers Kames Kettle Lakes
![Page 25: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/25.jpg)
![Page 26: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/26.jpg)
CAUSES OF GLACIATION Plate Tectonics Changes in Earth’s Orbit Changes in output energy from Sun Albedo and Atmosphere composition
![Page 27: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/27.jpg)
WIND EROSION AND DEPOSITION Deflations and Abrasion Loess Sand Dunes
![Page 28: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/28.jpg)
![Page 29: Unit 4: Agents of Erosion](https://reader035.fdocuments.us/reader035/viewer/2022062305/56816696550346895dda7c93/html5/thumbnails/29.jpg)