Certified Inspector of Sediment and Erosion Control (CISEC) Practice Exam 2026 – The All-in-One Guide for Exam Success!

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Which of the following is NOT listed as a factor impacting rainfall erosion?

Climate events

Soil erodibility

The length of flow over a distance

Wind speed

Rainfall erosion depends on the energy delivered by rain and runoff, and how easily soil particles can be detached and transported. Climate events influence rainfall intensity and duration, which increases erosive energy. Soil erodibility reflects how readily soil particles detach when that energy hits the surface. The length of flow over a distance (flow path length) affects how much energy runoff retains as it moves, increasing potential detachment and transport. Wind speed, however, drives wind erosion, not rainfall-induced erosion, so it isn’t a factor in rainfall erosion. That’s why wind speed is the correct choice for not fitting with rainfall erosion factors.