作　　者： (童李霞）; (燕琴）; (骆成凤）; (杜英坤）;

机构地区： 山东科技大学,山东青岛266590 中国测绘科学研究院,北京100830

出　　处： 《青海草业》 2017年第3期7-12,6,共7页

摘　　要： 本文利用遥感手段获取流域内的草地空间分布及变化信息,结合Markov模型和动态变化度对草地状况的时空变化特征进行分析。研究表明,2013年青海湖流域草地状况良好,未退化草地占草地总面积44.68%。未退化草甸是流域内的优势草地类别,主要分布在流域中部及环湖流域西南部,动态变化度为-0.49%,时空变化稳定。2000~2013年期间流域内未变化草地占草地面积53.56%,主要分布在流域中部。草地发生退化面积略大于恢复面积,总体呈退化趋势。在近13a内草地状况变化经历了幅度较小的退化、恢复、退化的过程。草地恢复主要分布在青海湖西北及北部地区,草地发生退化主要分布在流域西北地区。 long-term monitoring of grassland condition can reflect the change trend of regional ecological.In this study, the spatial distribution and change information of grassland in the watershed are obtained by remote sens- ing method, and the spatial and temporal characteristics of grassland are analyzed by using Markov model and dynamic change degree.Studies show that the grassland in the QLB is in good condition in 2013, and the total area of non-degraded grassland dominated QLB and covered about 44.68% of grassland in this region The normal meadow is the advantage of grassland types in a basin, mainly distributed in the middle part of the basin and the southwest of the basin, the dynamic change of -0.49%, temporal and spatial variation of sta- bility. During the period of 2000-2013, the not change grassland occupied 53.56%, which is mainly distribu- ted in the middle part of the basin. The degraded area of grassland was slightly larger than that of recovery area, and the overall trend was degraded. The process of degradation, recovery and degradation in the near 13a has been experienced. Grassland restoration is mainly distributed in the northwest and north areas of Qinghai Lake, and grassland degradation is mainly distributed in the northwest region of the basin.

关 键 词： 青海湖流域 草地状况 转移概率矩阵 动态变化度 时空变化特征