Protecting Steep Slopes Against Soil Erosion: Geotextiles and its Effectivness Under Heavy Rainfall

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00335884" target="_blank" >RIV/68407700:21110/19:00335884 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Protecting Steep Slopes Against Soil Erosion: Geotextiles and its Effectivness Under Heavy Rainfall

Original language description

In the framework of this research, experimental testing of selected types of geotextiles was carried out at two sites. Both synthetic and natural fiber materials used in construction were tested. The aim was to find out how different types of geotextiles are able to mitigate surface runoff and prevent soil erosion, i.e., to determine their effectiveness. The outdoor laboratory in Jirkov, where 5 containers are placed in different slopes and are artificially sprinkled. The plot areas are divided in half (each of 4 x 1 m), one half is covered with geotextile, while the other is bare soil. All materials were tested on all gradients in two series of repetitions. During two consecutive 30-minutes simulations, surface runoff and soil moisture regime were measured. The surface was photogrammetrically scanned by the camera before and after simulation. Subsequently, the soil loss throughout the simulation was analyzed from samples of surface runoff. The images were used for creating digital elevation models which were further analyzed in ArcGIS to produce the mean surface consolidation and soil loss volume changes. After saturation of the soil, surface runoff was formed regardless of whether it is protected or unprotected soil. The main difference was in soil loss, where preliminary results have shown that the protective effect of geotextiles is very significant, but it varies considerably according to the material. While natural fiber geotextiles have achieved effectiveness in reducing soil loss by over 90 %, synthetic materials have reached only 45-60 %. This research is funded by the TA CR (TH02030428), GA CR (GA17-33751L) and SGS (SGS17/173/OHK1).

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů