摘要
采用了黄河源地区1977、1990及2003年MSS、TM的3个时相遥感影像,通过人机交互的解译与GIS的空间分析,提取了玛多县3个时期的土地利用/覆被信息。分析了玛多县各地类的数量变化和空间变化特征。另外对景观生态空间分布格局,利用FRAGSTATS软件对玛多县景观级别的动态特征进行了分析。结果表明:玛多县的土地利用/覆被类型以草地为主,占全区总面积77.93%;退化现象十分严重,主要是草地覆盖度的降低以及草地沙化;景观破碎化程度在前期呈下降趋势,而后期呈上升趋势,景观斑块形态越来越偏离规则而变得复杂、多样。
Based on the remote sensing image of 1977,1990 and 2003 in research area,land use and land cover data were obtained. With the spatial analysis module of GIS,the character of land use and land cover change was analyzed. The change of landscape metrics were analyzed using the landscape analysis software FRAGSTATS. The results showed that： the main type of land use in Madoi county is grassland,nearly 77.93% of the total area. Grassland was degraded to sand. The landscape change showed that landscape fragmentation process is descend in prophase and ascend in anaphase. The patch shape becomes more complex with increasing landscape diversity.
出处
《地球信息科学》
CSCD
2007年第4期109-115,128,F0002,共9页
Geo-information Science
