摘要
以北京地区为例,利用像元信息分解法,定量提取出区域植被盖度,由植被盖度得到区域叶面积指数,在只考虑一次散射的情况下,利用植被-土壤二向反射模型,提取出下层湿润土壤反射率。通过引入粗糙度因子建立起粗糙地表下土壤反射率与叶面积指数的函数关系,进而得出土壤含水量。
In this paper, Beijing was chosen as a representative study area, and the method of pixel information decomposition was taken on the land part. The land cover percentage was extracted. LAI was calculated according to the research on the cover of plant. Based on characteristics of multi - reflecting light, the authors obtained the reflectance of the soil by using the Bi - directional Reflectance Model of Canopy and Soil and taking only one reflectance into account. ＇According to the roughness factor, the soil water content could be calculated based on the relationship between soil reflaction and LAI.
出处
《国土资源遥感》
CSCD
2006年第3期29-32,共4页
Remote Sensing for Land & Resources
关键词
植被-土壤二向反射模型
像元信息分解
叶面积指数
土壤含水量
Bi - directional reflectance model of canopy and soil
Pixel information decomposition
LAI
Soil water content
