基于LST-VI特征空间的喀斯特地区土壤水分时空变化研究

晏红波,李浩,卢献健,王佳华

Spatial-temporal Variation of Soil Moisture in Karst Area based on LST-VI Feature Space

Hongbo Yan,Hao Li,Xianjian Lu,Jiahua Wang

表1 4种植被指数与地表温度的特征空间干湿边拟合方程

Table 1 Fitting equations for the characteristic spatial dry and wet edges of four vegetation indices and surface temperature

数据类型 指数 干湿边 拟合方程 R2 原始特征空间 NDVI 干边 y=-11.106 5*x+28.677 8 0.94 湿边 y=-4.578 2*x+18.113 5 0.40 EVI 干边 y=2.265 2*x+23.360 3 0.17 湿边 y=3.258 9*x+14.314 9 0.39 FVC 干边 y=-6.923 5*x+24.931 7 0.91 湿边 y=-2.992 7*x+16.870 6 0.46 SAVI 干边 y=-22.731 4*x+28.932 2 0.92 湿边 y=-4.946 0*x+15.761 3 0.22 剔除温度异常值的特征空间 NDVI 干边 y=-10.879 6*x+28.036 5 0.97 湿边 y=-5.671 6*x+19.309 4 0.73 EVI 干边 y=1.824 5*x+22.834 6 0.21 湿边 y=3.134 7*x+15.149 2 0.58 FVC 干边 y=-7.568 5*x+24.587 0 0.96 湿边 y=-3.126 7*x+17.636 7 0.69 SAVI 干边 y=-19.954 9*x+27.508 4 0.89 湿边 y=-1.72 9*x+15.708 1 0.04