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Unique aspects of modeling irrigation-induced soil erosion

ASPECTOS UNICOS DE MODELAR LA EROSION INDUCIDA POR LA irrigación

Bjorneberg, D.L. and Kincaid, D.C. and Lentz, R.D. and Sojka, R.E. and Trout, T.J. (2000) Unique aspects of modeling irrigation-induced soil erosion. International Journal of Sediment Research. 15(2):245-252.

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Abstract

The mechanics of soil erosion from irrigated and rainfed lands are similar. Soil particles are detached, transported and deposited. However, there are some systematic differences between irrigation and rainfall erosion. Electrolyte concentrations in irrigation water, for example, are almost always greater than in rain water. Differences between rainfall and irrigation are more prominent for surface irrigation than for sprinkler irrigation. For instance, rainfall wets the soil before runoff begins, but water initially flows onto dry soil in irrigation furrows. Furthermore, furrow flow rate decreases with distance and increases with time, while the opposite tends to occur with rainfall. For sprinkler systems, travel direction and slope aspect interact, so runoff can flow within the irrigated area or from the irrigated area onto dry or wet soil. Thus, a sprinkler-irrigation erosion model must consider both the rainfall-runoff situation and the furrow flow situation. These differences in soil and water interactions must be considered before computer models can accurately simulate irrigation-induced soil erosion.

Item Type: Article
NWISRL Publication Number: 1015
Subjects: Irrigation > Furrow irrigation > Erosion
Soil > Erosion
Research methodology
Mass Import - autoclassified (may be erroneous)
Depositing User: Michelle Wayment
Date Deposited: 20 Nov 2010 21:50
Last Modified: 15 Nov 2016 15:36
Item ID: 103
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/103

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