forest conservation; afforestation
Refers to the management and preservation of mountain forests, including erosion control and reforestation. Often used in technical or policy contexts.
治山事業は、土砂災害を防ぐために重要です。
Forest conservation projects are important for preventing landslides.
この地域では、治山のために植林が
In this area, afforestation is being promoted for forest conservation.
治水 deals with managing rivers and flood control, whereas 治山 deals with conserving forests and preventing erosion on mountains, and the two are often planned together.
erosion-control dam; soil-saving dam
Compound of 治 (manage, control) and 山 (mountain). The term likely emerged in modern forestry and civil engineering contexts.