不同含水量黄棕壤反射光谱特征研究

采用多光谱辐射仪(MSR～16R)对自然条件下不同水分含量黄棕壤光谱特征进行了研究，试验结果表明在可见光部分(460～710nm)，土壤含水量与光谱反射率相关性差，而在红外部分(760～1650nm）土壤含水量与光谱反射率达到极显著负相关，模式方程拟合度都在0．86以上，因此通过测定土壤光谱反射率来推算土壤含水量是可行的。应用地面光谱测量试验的结果，本文讨论了由地面光谱测量来推算土壤含水量向由卫星遥感影像反演土壤含水量过渡的可能性，进而对采用TM遥感影像对黄棕壤分布区土壤水分状况实施遥感监测的可行性作了一些探访。

Study on Reflectance Spectra of Yellow Brown Soil of Different Water Contents

The spectral feature of yellow brown soil under the conditions of different water contents was studied by using multi-spectral Radiometer-16R. Results show that in 460-710nm the correlation coefficients between soil water content and spectral reflectance are low, while in 760-1650nm soil water contents are very significantly correlated with spectral reflectance, and the agreement indices of the fitting degrees of the model equation are over 0.86. So, it is feasible to calculate soil water content from soil spectral reflectance. Using the results of ground experiment, this paper discusses the possibility of the transformation from calculating soil water content by ground spectral reflectance to calculating soil water content by remote sensing images. Furthermore, this paper introduces some research on the feasibility of monitoring soil water content of yellow brown region using remotely sensed TM images.