Which type of materials should be used to cover a 2:1 slope to prevent erosion?

Using groundcover or other planting materials to cover a 2:1 slope is a highly effective strategy for preventing erosion. Groundcover plants are specifically designed to stabilize soil due to their root systems, which help bind the soil together. These plants can absorb water, reducing runoff and the potential for erosion. Additionally, they provide a natural barrier against the forces of wind and rainfall, which can wash away unprotected soil on slopes.

While mulch can help with moisture retention and initial erosion control, it does not provide the long-term stabilization that rooted planting materials do. Grass turf alone can be beneficial; however, its effectiveness depends on proper maintenance and establishment. Other planting materials, including native species or perennials, offer additional benefits such as biodiversity, aesthetic appeal, and habitat creation, making them exceptionally valuable for slope management.

In contrast, choosing not to use any materials at all leaves the slope vulnerable to erosion from rainfall and runoff, which could lead to significant soil loss over time. Therefore, the use of groundcover or similar planting materials is the most effective way to ensure the stability and longevity of a 2:1 slope in maintaining soil integrity.