鄱阳湖区植被覆盖度的遥感估算

植被覆盖度是一个十分重要的生态学参数,对于全球环境变化和监测研究具有重要意义.为了有效地从遥感资料中提取植被覆盖度,在像元二分模型两个重要参数推导的基础上,对已有模型进行了改进,建立了用归一化植被指数(NDVI)估算植被覆盖度的模型.运用该模型对鄱阳湖区2003年的植被覆盖度进行了估算,通过鄱阳湖部分地区的实地考察,对2003年的植被覆盖度估算结果进行了验证.结果表明使用这种改进模型进行植被覆盖度遥感监测是有效可行的.

Vegetation coverage estimation in Poyang lake area by remote sensing method

Vegetation coverage is an important ecological parameter, possessing important significance to the global environment variation and monitoring investigation. In order to effectively extract vegetation coverage from remote sensing data, based on 2 parameters derivation in equinoctial model of picture element, the existing model is improved and the model to estimate vegetation coverage by NDVI was up. The model was used to estimate vegetation coverage of Poyang lake area in 2003. The field investigation in local area of Poyang lake was carried out to verify the vegetation coverage estimation result in 2003. The result demonstrates that the improved model is effective to monitoring vegetation coverage by remote sensing method.