Is Keyline Plowing Effective for Erosion Control?

Understanding Keyline Plowing

Keyline plowing is a technique used in keyline design, a system developed by Australian engineer P.A. Yeomans. This method involves creating a series of shallow trenches, typically 12-18 inches deep, that are angled at 1-2% to allow water to flow slowly across the landscape. By infiltrating water into the soil, keyline plowing reduces surface runoff, decreases erosion, and promotes groundwater recharge.

Effective Techniques for Keyline Plowing

To effectively use keyline plowing for erosion control, it’s essential to follow a few key techniques. First, the angle of the trenches should be carefully considered. A steeper angle may result in water running off the landscape too quickly, while a shallower angle may not allow for sufficient infiltration. A general rule of thumb is to use a 1-2% angle for most soils. Additionally, the spacing between trenches should be around 20-30 feet to allow water to flow slowly and infiltrate the soil. By spacing trenches too close together, water may not have a chance to infiltrate, and the benefits of keyline plowing may be diminished.

Benefits of Keyline Plowing for Erosion Control

Keyline plowing has been shown to be highly effective in reducing erosion and promoting water infiltration. By creating a network of shallow trenches, keyline plowing allows water to slowly spread across the landscape, reducing the pressure on the soil and minimizing erosion. In areas with heavy rainfall or steep slopes, keyline plowing can be especially beneficial in preventing landslides and soil erosion. By incorporating keyline plowing into your keyline design, you can create a more sustainable and resilient landscape that is better equipped to handle changing weather conditions.