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Wolverhampton Intellectual Repository and E-Theses > School of Applied Sciences > Research Centre in Applied Sciences  > Plant and Environmental Research Group > Concentrated flow erosion rates reduced through biological geotextiles

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Title: Concentrated flow erosion rates reduced through biological geotextiles
Authors: Smets, T.
Poesen, Jean
Langhans, C
Knapen, A
Fullen, Michael A.
Citation: Earth Surface Processes and Landforms, 34(4): 493-502
Publisher: Wiley InterScience
Journal: Earth Surface Processes and Landforms
Issue Date: 2009
DOI: 10.1002/esp.1729
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Abstract: Soil erosion by concentrated flow can cause serious environmental damage. Erosion-control geotextiles have considerable potential for reducing concentrated flow erosion. However, limited data are available on the erosion-reducing potential of geotextiles. In this study, the effectiveness of three biological geotextiles in reducing soil losses during concentrated flow is investigated. Hereto, runoff was simulated in a concentrated flow flume, filled with an erodible sandy loam on three slope gradients (13·5, 27·0 and 41·5%). Treatments included three biological geotextiles (borassus, buriti and bamboo) and one bare soil surface. Darcy–Weisbach friction coefficients ranged from 0·01 to 2·84. The highest values are observed for borassus covered soil surfaces, followed by buriti, bamboo and bare soil, respectively. The friction coefficients are linearly correlated with geotextile thickness. For the specific experimental conditions of this study, borassus geotextiles reduced soil detachment rate on average to 56%, buriti geotextiles to 59% and bamboo geotextiles to 66% of the soil detachment rate for bare soil surfaces. Total flow shear stress was the hydraulic parameter best predicting soil detachment rate for bare and geotextile covered surfaces (R² = 0·75–0·84, p < 0·001, n = 12–15). The highest resistance against soil detachment was observed for the borassus covered soil surfaces, followed by buriti, bamboo and bare soil surfaces, respectively. Overall, biological geotextiles are less effective in controlling concentrated flow erosion compared with interrill erosion. Copyright © 2009 John Wiley & Sons, Ltd.
Type: Article
Language: en
Keywords: Geotextiles
Surface roughness
Flow shear stress
Surface cover
Soil detachment
Soil erosion
Water erosion
Soil conservation
Borassus aethiopum
Buriti Palm
Geotextile mats
Palm mat geotextiles
ISSN: 01979337
Appears in Collections: Plant and Environmental Research Group

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