SWC 211 Soil and Water Conservation Engineering
SOIL EROSION CONTROL
Mechanical measures play a vital role in controlling and preventing soil erosion
on agricultural lands.
They are adopted to supplement the agricultural practices
Soil erosion - three phase phenomena
By wind, H2O and gravity
Action of wind and water
Two forms of energy
Potential energy PE = mgh (head)
Force N = kgm / sec2 Nm/sec = watt
SOIL AND WATER CONSERVATION REVISION
1. Outline 4 stages of gulley formation
Stage 1: Initiation stage
The channel erosion and deepening of gully bed takes place.
Normally proceeds slowly where the top soil is resistant to erosion.
Stage 2: Development st