摘要
植被覆盖度作为衡量地表植被覆盖的一个重要指标,是计算土壤侵蚀模数、分析土壤侵蚀的必要参数。根据1994年和2004年两期同时相的Landsat TM遥感图像资料,处理和分析并提取北运河地区的NDVI指数,利用像元二分模型原理定量估算植被覆盖度,得出其植被覆盖分类图。在此基础上分析了北运河地区10年来的植被覆盖变化特征。
Vegetation fraction is a very important index to score the vegetation coverage on the land surface and is used in many aspects as one of the input parameters . Based on the dimidiate pixel model and the normalized difference vegetation index ,the vegetation fraction of study region can be calculated by using the model of quantifying vegetation fraction from normalized difference vegetation. The vegetation fraction in Beiyunhe valley of remote sensing was calculated based on this model. The authors used 1994 and 2004 Landsat TM data to analyze vegetation changes in Beiyunhe valley.
出处
《水土保持研究》
CSCD
北大核心
2006年第6期97-99,共3页
Research of Soil and Water Conservation
基金
北京市自然科学基金资助(4042011)
关键词
遥感
NDVI
像元二分模型
植被覆盖度
remote sensing
NDVI
dimidiate pixel model
vegetation fraction
