基于光谱指数建模的阿拉尔垦区土壤盐渍化信息提取与分析

代云豪, 管瑶, 冯春涌, 蒋敏, 贺兴宏

Extraction and analysis of soil salinization information of Alar reclamation area based on spectral index modeling

DAI Yunhao, GUAN Yao, FENG Chunyong, JIANG Min, HE Xinghong

表2 二维散点图模型拟合性

Tab.2 Goodness of fit of two-dimensional scatter diagram model

二维散 点图 光谱指数拟合公式 拟合度 SI- NDVI 线性: Y=0.942 6-3.063X 二次: Y=1.165 1-6.570X+9.859 7X2 几何: Y=-2.918X0.2594+2.201 5 双曲: Y=1.0/(0.425 2+14.226X) 对数: Y=-0.670 2-1.565lgX-0.297 7lg(X)2 R2=0.867 7 R2=0.929 6 R2=0.915 3 R2=0.872 4 R2=0.916 5 SI- MSAVI 线性: Y=1.053 5-3.087X 二次: Y=1.198 9-5.384X+6.475 4X2 几何: — 双曲: Y=1.0/(0.550 6+9.570 0X) 对数: Y=-0.834 3-2.241lgX-0.677 6lgX2 R2=0.888 6 R2=0.914 3 — R2=0.859 0 R2=0.909 7 SI- Albedo 线性: Y=0.282 8+0.185 9X 二次: Y=0.363 2-1.085X+3.583 5X2 几何: — 双曲: Y=1.0/(3.556 1-2.169X) 对数: — R2=0.097 5 R2=0.336 1 — R2=0.115 3 — Albedo- MSAVI 线性: Y=0.677 6-0.237 9X 二次: Y=-0.800 5+9.844 8X-16.65X2 几何: Y=0.254 5X-0.064 5+0.3284 双曲: Y=1.0/(1.500 1+0.504 1X) 对数: Y=-1.022-6.013lgX-5.416lgX2 R2=0.001 9 R2=0.050 5 R2=0.000 2 R2=0.001 5 R2=0.033 3