ATI Soils

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ATI Soils

Lesson Outline

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Faculty/Instructor

Deana Namuth-Covert
Professor, Director of Online Education and Outreach, The Ohio State University; Agronomy & Horticulture Adjunct Professor, University of Nebraska
dcovert2@unl.edu

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Erosion

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Summary

Erosion is the wearing away of the land surface by agents that abrade, detach, remove, and deposit the material elsewhere. Erosion has especially been accelerated by human or anthropogenic activities.
Erosion impacts soil, water, and air quality.
Some farming practices reduce water quality as topsoil, rich in nutrients, is detached, transported and deposits into water bodies.
Urbanization is another contributor to erosion as the construction and movement of material creates conditions for soil erosion.
Erosion is commonly broken down into wind and water erosion though energy is the main factor in both.

Climate, soil properties, and land management (along with others) influence water and water erosion.

Factors Influencing Erosion
Water Erosion	Wind Erosion
climate	climate
soil properties: aggregation /soil moisture	soil properties
soil cover	soil cover
land management	land management
topography	soil surface roughness
	unsheltered distance
	wind velocity and turbulence

The three processes in water and wind erosion are detachment, transport, and deposition.
Types of water erosion include splash, sheet, rill, and gully.
Types of wind erosion include suspension, saltation, and creep.

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This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the USDA or NSF.

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