These methods made use of local materials and tried to tackle the problem of erosion at its roots. "If you want to prevent landslides by removing the cause for erosion, which is simply water meeting soil, then you've got to get the water to flow elsewhere-toward vegetation," explains Kuo. "That will prevent future erosion."
郭清江說明這套工法：「其實就是要移去土石流發生的原因，也就是『土』和『水』，只要減少土石崩壞並將水流引導到有植被的地方，就能避免再次發生土石流。」