影响降雨击溅侵蚀过程的多元回归正交试验研究

根据多元正交设计,对马兰黄土进行了降雨(人工模拟)溅蚀试验。得到了计算降雨溅蚀分散量(Y)和降雨溅蚀向下坡搬运量(Z)的两个回归方程。方程揭示影响降雨击溅侵蚀诸因素之间的交互作用,以及各个因素在降雨溅蚀过程中的地位和对各种降雨溅蚀临界值的明显影响。

EXPERIMENTAL STUDY OF RAINSPLASH EROSION PROCESS BY MULTIVARIATE ORTHOGONAL DESIGN

Laboratory investigation of rainsplash erosion on Malan Loess has been conducted based on a multivariate orthogonal design.Five factors including rainfall intensity (I),cover density (V),rainfall duration (T),antecedent soil moisture content (C),and slope angle (A)were considered.In total,three replicates of 27 sets of experiments,each representating a different combination of the factors selected,were conducted.Regression equations using rainsplash detachment and rainsplash transport as dependent variables and derivatives of the five selected factors as independent variables were computed:What is significant is the inclusion of six and four interaction terms in the equation for splash detachmet Y and splash transport Z respectively.The analysis of results obtained from two equations shows that the interaction effects among some of the controlling factors of rainsplash erosion are of paramount importance.