wind erosion l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
WIND EROSION PowerPoint Presentation
Download Presentation
WIND EROSION

Loading in 2 Seconds...

play fullscreen
1 / 12

WIND EROSION - PowerPoint PPT Presentation


  • 185 Views
  • Uploaded on

WIND EROSION. Text page 144: 3 problem areas Large Continental Wheat Growing Regions line the Great Plains in US Dune areas along coastlines Intensively Farmed Organic Soils What are the characteristics of these areas that promote wind erosion?. Wind Erosion.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'WIND EROSION' - maegan


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
wind erosion
WIND EROSION
  • Text page 144: 3 problem areas
  • Large Continental Wheat Growing Regions line the Great Plains in US
  • Dune areas along coastlines
  • Intensively Farmed Organic Soils
  • What are the characteristics of these areas that promote wind erosion?
wind erosion2
Wind Erosion
  • What are the two basic processes that together make up soil erosion?
  • How would these two processes compare in wind erosion vs water erosion?
wind erosion4
Wind Erosion
  • The text discusses 3 types of soil movement in wind erosion.
  • How would these compare between wind erosion and water erosion?
saltation
SALTATION
  • Saltation: (most within 1 foot of the surface)
  • Typical size from 0.1 to 0.5 mm.
  • 65 to 90% of all wind erosion
creep
CREEP
  • Creep: Roll on the surface
  • Typical size from 0.5 to 20mm.
  • 7 to 25% of all wind erosion
suspension
SUSPENSION
  • Suspended particles: Dust clouds
  • Typical size <0.1 mm
  • 3 to 10 % of all wind erosion.
to be moved by wind erosion a soil particle must
To be moved by wind erosion, a soil particle must:
  • Be light weight enough to be moved.
  • Be sticking up into the wind
  • Be free to move (not held in place)
wind erosion9
WIND EROSION

Wind Erosion generally requires a wind

speed of at least 10 mph at a height of

1 foot above the surface.

wind erosion equation
WIND EROSION EQUATION
  • E = f(I, K, C, L, V)
  • I = Soil Erodibility Index - Related to Cloddiness
  • K = Surface roughness
  • C = Climatic Factor - wind velocity and soil moisture
  • L = Field Length Factor
  • V = Vegetative Cover Factor
compare the following erosion control methods between wind and water erosion
Compare the following erosion control methods between wind and water erosion.
  • Vegetative Cover
  • Crop Residue
  • Field Length
  • Strip Cropping
  • Contour Farming
  • Moisture Conservation
  • Surface Roughness
factors most responsible for wind erosion in iowa
FACTORS MOST RESPONSIBLE FOR WIND EROSION IN IOWA
  • 1. Fall plowing, especially soybean stubble
  • 2. Dry fall and winter months followed by high winds in March and April
  • 3. High speed, multi-bottom plowing which turns most residue under
  • 4. Large cultivated fields, especially soybeans