Schematic Example
TENAX geomats are installed on the slopes and at the bottom of an earth channel |
Revegetation of concrete channel |
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Legend:
1 - Erodible soil
2 - Top soil
3 - TENAX MULTIMAT geomat
4 - TENAX TENWEB geocells
5 - Nail
6 - Vegetation
7 - Concrete lining
8 - Concrete wedge |
Vegetated Water Channel
THE PROBLEM
Earth channels and ditches shall withstand the passage of water without incurring in erosion of the streambed and of the side banks, even in case of high water flow and velocity.
In such conditions the erosive forces produced by the fast water movement may produce local holes, longitudinal and transversal rills, toe excavation with subsequent side slope failures, thus altering the hydraulic condition of the water way.
THE SOLUTION
The establishment of a dense vegetative cover on the bottom and on the side slopes of channels and ditches provide the most effective solution to the erosion problem: the vegetation decreases the water speed at the contour, allows the sedimentation and trapping of suspended soil particles, prevents the detachment of soil and resist the shear forces of the flow by transferring them into the base soil through the root system. TENAX geomats allow a fast and unobstructed vegetation growth and permanently reinforce the roots system. The TENAX geomats-vegetation composite is the best permanent protection of earth channels and ditches.
Revegetation of Concrete Channel
THE PROBLEM
Concrete channels provide a sound solution to the transport of large volumes of water with high velocity. However their environmental impact may cause problems: the present environmental awareness often requires that old concrete channels be re-vegetated in some way and that new concrete channels shall be designed to allow for the establishment of vegetation on the side slopes.
THE SOLUTION
TENAX geocells can be easily fixed on the side slopes of concrete channels by means of nails or grouted rebars. Filling the cells with top soil and seeding allows for rapid vegetation of the side slopes, outside the water level. The wet contour usually is not lined with the geocells, in order to avoid disturbance to the water flow. TENAX geocells are the most effective soil confinement system. They ensure a stable topsoil layer to support the growth of grass and vegetation even on impervious surfaces like concrete. For long slopes, the installation of a TENAX geomat or biomat on the geocells may be advisable
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