Position: Home > Articles > Research on Vegetation Changes in Drainage Area Based on Integration of Streams Network and NDVI——A Case Study in Xunhe Watershed
Bulletin of Soil and Water Conservation
2007,27
(5)
101-104
基于河流网络结构和NDVI集成的流域植被变化研究——以旬河流域为例
作 者：
梁轶;刘康;王雷;周辉;连军营
单 位：
西北大学
关键词：
河流网络结构;河流等级;河流缓冲区;归一化植被差异指数(NDVI)
摘 要：
利用GIS模拟旬河流域河流网络结构,根据河流网络结构建立缓冲区,分别研究了不同等级河流缓冲区内,1997年和2004年相同时段NDVI值的分布特征,分析了河流等级与其缓冲区内NDVI值的关系。结果发现,利用GIS模拟的山地数字河网能够很好地与真实河网吻合;河流等级与其缓冲区内的ND- VI值存在负相关关系;2004年河网缓冲区内NDVI值分布较1997年好,说明近几年旬河流域生态建设成效显著。
译 名：
Research on Vegetation Changes in Drainage Area Based on Integration of Streams Network and NDVI——A Case Study in Xunhe Watershed
作 者：
LIANG Yi~1 LIU Kang~1 WANG Lei~1 ZHOU Hui~2 LIAN Jun-ying~1 (1.Department of Urban and Resource Sciences,Northwest University,Xi'an,Shaanxi 710121,China; 2.Shaanxi Information Center of Agricultural Remote Sensing,Xi'an,Shaanxi 710015,China)
关键词：
stream network structure;;stream order;;stream buffer area;;NDVI
摘 要：
Stream network structure in Xunhe watershed is simulated using GIS methods for the buffering area construction.NDVI in 1997 and 2004 is calculated to examine its relationship with stream order.Results indicate that stream network in mountain area can be well simulated,stream order and NDVI are closely re- lated,and the NDVI in 2004 is higher than in 1997.These suggest that the eco-environment in Xunbe water- shed has been improvement in recent years.
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