Controlling the runoff in this way naturally creates garden terracing. Runoff is pooled in a series of stabilized gardens around the building so soil is deposited instead of being carried away. This approach protects all the retaining walls especially the ones that support the flat access and flat living areas from eroding away at the bottom and so provides long term protection of the foundation columns that are planted first, in the natural terrain, before the retaining walls.
Protecting the natural soil and plant fauna by stabilizing topsoil in
this way also helps protect crop gardens that are close to the building.
Native fauna gardens are created by stabilizing the terrain with these
highly-durable thin-shell retaining walls.