According to the variation of gradient pressure structure can be divided 根据地层压力梯度的变化可以划分地层的压力结构。
Bum severity is also affected by the topography . the basic rule is that with the increasing of slope and elevation , the burn will become much severer . but to the aspect , it was contrarious ( excluding the nonaspect ) 火烧强度随地形因子梯度的变化而变化,其基本规律是随坡度、海拔梯度的增加而减小,而随坡向梯度的增加而增加(无坡向除外) 。