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Proper design of the drainage system is necessary, as a mixed system can be used, with channels covered with bio-blankets and concrete slopes, optimizing the solution.
Surface drainage in areas of compacted or cohesive soil may be successfully coated with three-dimensional anti-erosion blanket as long as the slope does not exceed 30%. There are many advantages, among which we can mention the partial infiltration of water in the soil, because when the biomantle saturates, the water runs superficially over it, draining the fluid quickly and efficiently.
Another important advantage is that the bio-blanket molds to the ground, avoiding cracks and is flexible, that is, even if some repression or mass movement occurs the drainage system will remain intact. For subsurface and deep drainage sediment retainers can be used, which are draining and flexible, do not clog and can successfully conduct liquids.