ATI Soils

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ATI Soils

Lesson Outline

Lesson Media Objects

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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Water Erosion

Types of water erosion

Types of Water Erosion

sheet erosion

rill erosion

gully erosion

splash erosion

SHEET EROSION: Removal of thin layer of soil from a large area.

In sheet erosion a thin layer of soil is removed from a large area.
Image by M. Mamo, Labels added by UNL

RILL EROSION: A series of small channels on a slope carved by running water.


Rill erosion in a field. Image by NRCS, Labels added by UNL	Rill erosion at a construction site. Image by M. Mamo, Labels added by UNL

GULLY EROSION: Large, wide channels carved by running water. As a rule of thumb, a gully is large enough that it cannot be smoothed out with conventional tillage equipment.

Gully erosion in a pasture. Image by NRCS

SPLASH EROSION: Direct movement of soil by splashing. Soil particles can be thrown as far as 3 feet by raindrop splash.

The impact of a water droplet can dislodge soil particles making them susceptible to erosion. Image by NRCS

Click on the Splash Animation

Animation by http://serc.carleton.edu/NAGTWorkshops/visualization/collections/soil_erosion.html
http://www.public.asu.edu/~mschmeec/rainsplash.html

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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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In sheet erosion a thin layer of soil is removed from a large area. Image by M. Mamo, Labels added by UNL