摘要
在自然状况下 ,对裸土进行人为干湿处理 ,利用 ASD PRO FR2 5 0 0地物光谱仪测得土壤在 35 0 nm～ 2 5 0 0 nm反射光谱并适时采取表层土 ,利用烘干法测得土壤体积含水量。依据土壤湿度与土壤光谱反射率之间的相关关系 ,得出土壤含水量与土壤光谱反射率的非线性方程。利用该方程和光谱反射率值进行土壤水分反演 ,通过对反演结果的误差分析 ,结合光谱反射率与体积含水量的指数回归分析 ,笔者认为采用 1 95 0 nm～ 2 2 5 0
With the natural solar illumination,the spectra of bare soils,treated by different humidity,were measured by an ASD PRO FR2 500 in the 350～2 500 nm regions.At the same time,the volumetric water contents of surface soils were also measured through oven drying method.According to the exponential relationship between the volumetric water content and the spectra,the nonlinear model was set up to reverse the surface water content of soil.By error analysis,combined with exponential regression analysis,in the 1 950～2 250 nm regions,it has lowest estimation error and highest regression coefficint.So we regarded the 1 950～2 250 nm regions as the best detecting band for hyperspectral remote sensing on surface water content of bare soil.
出处
《遥感信息》
CSCD
2003年第4期33-36,共4页
Remote Sensing Information
基金
国家 973项目 ( G2 0 0 0 0 779)
国家 863项目 ( 2 0 0 2 AA13 0 0 10 )资助
关键词
波段
地物光谱仪
反射光谱
指数回归分析
土壤体积含水量
soil volumetric water content
reflected spectra
exponential regression analysis
best detecting band
