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    Concentrated flow erosion rates reduced through biological geotextiles

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    Authors
    Smets, T.
    Poesen, Jean
    Langhans, C
    Knapen, A
    Fullen, Michael A.
    Issue Date
    2009
    
    Metadata
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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.
    Citation
    Earth Surface Processes and Landforms, 34(4): 493-502
    Publisher
    Wiley InterScience
    Journal
    Earth Surface Processes and Landforms
    URI
    http://hdl.handle.net/2436/52133
    DOI
    10.1002/esp.1729
    Additional Links
    http://www3.interscience.wiley.com/journal/121684678/abstract
    Type
    Journal article
    Language
    en
    ISSN
    01979337
    10969837
    ae974a485f413a2113503eed53cd6c53
    10.1002/esp.1729
    Scopus Count
    Collections
    Faculty of Science and Engineering

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