There were two kinds of soil used in this study, lateritic soil and yellow soil, and were collected from northern Taiwan.The soil was remolded in a test box.

• 冲蚀试验采用台湾北部地区的红壤及黄壤土，重模于冲蚀试验箱，并分别利用天然卵石及人造水泥圆球铺放在土壤表面模拟石块覆盖。