structure in natural material, wood and stones, for scarp containment. example of natural engineering - soil bioengineering

bioengineering care cobblestone concern consolidate consolidation construction containment ecology engineering environment environmental erosion escarpment footpath forest forestry ground habitat hydrogeological inclination incline instability italy land material natural nature pebbles prevention protection reinforced reinforcing scarp slope soil stabilization stiffen stones structure support technique terracing terrain timber trunks vegetable wood