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← HistoryWhich consequence results when terrace construction lacks proper water controls?
A)Accelerated topsoil erosion occurs downslope✓
B)Uniform crop irrigation becomes possible
C)Alkaline evaporites concentrate on surface
D)Ponding decreases available arable land
💡 Explanation
Accelerated topsoil erosion occurs downslope due to overland flow, because a lack of water controls increases the Hydraulic shear stress acting on the soil. This causes detachment and transport of finer materials, rather than gradual infiltration. Therefore, erosion occurs, rather than water retention.
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