Hilly area usually has a steep ground with different level of slope.
When the land is used for paddy field, vegetable garden or hard wood
plantation, we need to make a Terracing way to avoid a landslide.
In some areas, although the Terracing way is applied, in rainy season
it is possible to have a landslide in a water crossings. The strong water
flow will erode the land wall and the landslide can not be avoided.
It is suggested to make a strong water gutter and a bit deep or build a
rock wall/bamboo wall or plant trees which have strong roots
(like bamboo or shrubs)
To save trees and the land is important but to avoid the landslide to
protect people is more important.
“ The rain follows after the forest “ (Hawaiian proverb)