砒砂岩地区降雨与植被耦合关系对侵蚀产沙的影响

张喜旺, 秦奋

Coupling relationship of precipitation and vegetation and its influence for sediment yield in Pisha sandstone area

Xiwang ZHANG, Fen QIN

表2 年输沙量与相关影响参数的回归模型

Tab. 2 Regression model of annual sediment yield and related influencing parameters

因变量 自变量 回归模型 R2 Ra2 F Sig y x1, x2 y = 1.433x1 -461.656x2 + 693.651 0.5234 0.3872 3.8433 0.0748 y x1, x2, x3, x4 y = 0.068x1 + 23.712x2 + 64.157x3 -34.229x4 + 5.246 0.8998 0.8196 11.2248 0.0103 y x1, x2, x5, x6 y = 1.528x1 -296.450x2 + 176.245x5 -63.748x6 + 501.673 0.6688 0.4039 2.5244 0.1687 y x1, x2, x3, x4, x5, x6 y = -0.038x1 + 284.335x2 + 85.566x3 -80.435x4 + 90.794x5 -528.622x6 -100.283 0.9744 0.9232 19.0241 0.0174