Download Slope Stabilization and Erosion Control: A Bioengineering by Roy P.C. Morgan, R.J. Rickson PDF

By Roy P.C. Morgan, R.J. Rickson

This booklet is an updated overview of analysis and perform at the use of crops for slope stabilization and regulate of floor erosion because of water and wind. From a uncomplicated figuring out of the rules and practices of crops progress and institution, it describes how plants may be handled as an engineering fabric and used to resolve erosion and slope balance difficulties.

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Additional resources for Slope Stabilization and Erosion Control: A Bioengineering Approach: A Bioengineering Approach

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It is more a function of vegetation (plant arrangement, plant population, litter, mulch) and, on agricultural land, tillage methods, than it is a soil-vegetation interaction parameter. The roughness coefficient is normally considered as a summation of the roughness imparted by the soil particles, surface micro-topography (form roughness) and vegetation, acting independently of each other. 15) where u=the velocity of the flow (m/s); R=the hydraulic radius (m), often taken as equal to flow depth in shallow flows; S=slope of the energy line (m/m); n=Manning’s roughness coefficient (m1/6); and Q=the quantity of runoff (m3/ms).

The larger the amount of detachment, the greater will be the speed of sedimentation and the shorter the distance moved by the detached particle. Thus infiltration and surface roughness, through their effects on runoff generation, are important controls over the splash process. However, if the soil surface is totally covered by water of some depth, splash does not take place at all. Relations suggested by Park, Mitchell and Scarborough (1982) and Rose et al. 14 Schematic representation of sedimentation in a grass filter strip.

For soils with a wide aggregate-size distribution, the single particle-size parameter included in the above equations is inadequate, and the transport capacity may have to be calculated separately for different particle or aggregate size classes. For a small amount of runoff, the area of ‘attack’ is limited to the area covered by small particles. When the runoff increases, more particle sizes and thus a larger surface area become accessible. When an increasing amount of fine material is removed from the surface and only the larger particles are left behind, hardly any material can be removed because the larger particles protect the soil surface.

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