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Comparison of Field and Laboratory Experiment Test Results for Erosion Control Products

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032352,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14038) @2003
Authors:   Ming-Han Li, Harlow C. Landphair, Jett McFalls
Keywords:   Erosion control, field experimentation, rolled erosion control products

The purpose of this study was to compare soil loss results from field and laboratory experiments on five rolled erosion control products (RECPs) and one spray-on bonded fiber matrix (BFM). Beginning in 1990, erosion control products to be used on Texas highway embankments, such as rolled blankets and hydromulches required evaluation of their soil erosion control effectiveness in a field laboratory developed by Texas Department of Transportation (TxDOT) and Texas Transportation Institute (TTI). Products were tested on 6.1-meter wide test plots on an embankment of either a 33% (21.3 meters long) or 50% (15.2 meters long) slope during vegetation growing seasons, using simulated rainfalls. Products that performed well received the approval for Texas highway application. This field testing program was revised in the end of 2001 and transformed to be conducted in an indoor laboratory. The standard test plot size was reduced to 1.8 by 9.1 meters. Tested slopes maintained at either 33% or 50%. The comparison results of field and indoor laboratory data indicate that regardless of the slope and the soil type, the soil loss ratio between field and indoor data maintains almost the same. The effects of rainfall magnitude, raindrop size, and test plot size are discussed.

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