According to one researcher, a hillside with adequate soil and water conservation is 15,000 times less susceptible to landsliding than one without; that is, an adequately protected hillside rained on 15,000 times is the equivalent of an unprotected hillside that is rained on just once.
據林試所集水區經營系一位研究員表示，一塊做好水土保持的山坡地，遭雨水沖蝕流失的土地，是未做水土保持坡地的一萬五千分之一；也就是說，做好水土保持的山坡地，經雨水沖蝕一萬五千次，與未做水土保持的山坡地，受一次雨水沖蝕的結果一樣。