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United States Department of Agriculture

Agricultural Research Service

Research Project: Soil and Water Conservation for Northwestern Irrigated Agriculture

Location: Northwest Irrigation and Soils Research

Title: Erosion: Irrigation-induced

Authors
item Lehrsch, Gary
item Lentz, Rodrick
item Bjorneberg, David
item Sojka, R.E. -

Submitted to: Online Reference Database Earth Systems and Environmental Sciences
Publication Type: Review Article
Publication Acceptance Date: February 22, 2014
Publication Date: N/A

Technical Abstract: Soil can be eroded by sprinkler or surface irrigation. Once sprinkler droplet kinetic energy detaches soil, overland flow transports the sediment downslope and off-site. Protecting the soil surface, increasing sprinkler wetted diameters, and tilling to increase infiltration and thereby lessen overland flow are effective control measures. Runoff minimization and management are key to reducing erosion induced by either sprinkler or surface irrigation. Slowing furrow stream velocities with mulch or crop residues reduces the flow’s hydraulic shear and, in turn, detachment of soil from furrow wetted perimeters. Stabilizing surface soil with, for example, polyacrylamide, bio-polymers, or whey keeps soil in place and helps maintains acceptable water quality in nearby surface water.

Last Modified: 12/19/2014
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