SOIL BIO ENGINEERING TECHNIQUES refers to the use of plant species in order to provide structural support to the soil particles. In Soil Bio engineering  plant roots promote soil cohesion by holding together soil particles, giving them less exposure to the force of weather elements  like wind and storm water. The specific technique to be applied depends on the particular problem to be solved. In this case there are two problems both initiated by the force of storm water running down land (People's houses) from the quarry (upland) during rainy season.

  1. Collapsing slope - the slopes of the quarry need to be stabilized in order to prevent further distortion of landscape.  Techniques like wattle fence and bush mattress can be used to form a retaining wall which will support a particular thickness of the soil (depending on the height of the cuttings) hence  rescuing collapsing slopes.
  2. Soil erosion - From the upland storm water move with a high velocity to the down-land where  lives local community. The force of moving water wash down loose soil particles leaving the upland unsuitable for supporting vegetation growth while sediments deposition down land may promote flooding of the area. Soil erosion can be combated by techniques like live gullies and silt traps

THE EFFICIENCY OF STRUCTURE(TECHNIQUE) INCREASES OVER THE PERIOD OF TIME SINCE VEGETATION COVER TAKES TIME TO MATURE.

Erosion Control

During site visit and inspection following rainfall days, it was observed that small gullies formed by storm water were common in the areas next to the project area compared to the project area.

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26Jun

Species of plants planted and their number

peltophorum pterocerpum 40 trees Adenanthers paronina 10 trees flambouyant 10 trees Leuceana leucocephela 10 trees Acacia polyacentha 15 trees Syzygum cumini 4 trees Azadirachite indica 6 trees

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26Jun

Wattle fence

Constructed by erecting poles vertically then interweaving other poles horizontally

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26Jun

Mulching

Mulching is done by covering the soil with dry grasses

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26Jun

LIVE GULLIES

Live gullies are created by planting tree cuttings across the specific gully created as a result of soil erosion by the forces of storm run off.

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18May

APPLICATION OF SOIL BIOENGINGEERING TECHNIQUES FOR SLOPE STABIIZATION AND EROSION CONTROL

soibioengineering techniques refer to the use of plant material

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04May