Install swales and ditches to help improve stormwater drainage. This can also include implementing contouring or rain gardens to reduce surface runoff which can help increase slope stability.
Moderate – swales/ditches will need maintenance
Moderate – may not be reliable in preventing standing water during moderate/severe flood events; however, can reduce landslide risk by reducing surface runoff
Moderate – swales and ditches can be adjusted to some degree
Cost; maintenance requirements and expertise
Ensure that techniques do not exacerbate flood risk to equity areas/downstream communities.
