The effectiveness of jute and coir blankets for erosion control in different field and laboratory conditions

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Abstract

<p><strong>Abstract.</strong> Vegetation cover is found to be an ideal solution to most problems of erosion on steep slopes. Biodegradable geotextiles (GTXs) have been proved to provide sufficient protection against soil loss in the period before vegetation reaches maturity, so favouring soil formation processes. In this study, 500<span class="thinspace"></span>g<span class="thinspace"></span>m<sup>−2</sup> jute (J500), 400<span class="thinspace"></span>g<span class="thinspace"></span>m<sup>−2</sup> (C400), and 700<span class="thinspace"></span>g<span class="thinspace"></span>m<sup>−2</sup> coir (C700) GTXs were first installed on a 9° slope under “no-infiltration” laboratory conditions, then on a 27° slope under natural field conditions. The impact of GTXs on run-off and soil loss was investigated to compare the performance of GTXs under different conditions. Laboratory run-off ratio (percentage portion of control plot) equalled 78, 83, and 91<span class="thinspace"></span>%, while peak discharge ratio equalled 83, 91, and 97<span class="thinspace"></span>% for J500, C700, and C400 respectively. In the field, a run-off ratio of 31, 62, and 79<span class="thinspace"></span>%, and peak discharge ratio of 37, 74, and 87<span class="thinspace"></span>% were recorded for C700, J500, and C400 respectively. All tested GTXs significantly decreased soil erosion. The greatest soil loss reduction in the field was observed for J500 (by 99.4<span class="thinspace"></span>%), followed by C700 (by 97.9<span class="thinspace"></span>%) and C400 (by 93.8<span class="thinspace"></span>%). Irrespective of slope gradient or experimental condition, C400 performed with lower run-off and peak discharge reduction than J500 and C700. The performance ranking of J500 and C700 in the laboratory differed from the field, which may be explained by different slope gradients, and also by the role of soil, which was not included in the laboratory experiment.</p>

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Kalibová, J., Jačka, L., & Petru, J. (2016). The effectiveness of jute and coir blankets for erosion control in different field and laboratory conditions. Solid Earth, 7(2), 469–479. https://doi.org/10.5194/se-7-469-2016

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