干旱区生态环境知识资源中心(Arid): 环青海湖区沙漠化土地景观格局自相关分析

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	环青海湖区沙漠化土地景观格局自相关分析
其他题名	Spatial Autocorrelation Analysis on Sandy Landscape Pattern in the Peripheral Regions of the Qinghai Lake
	马燕飞 1; 沙占江 1; 牛志宁 2; 郭丽红 1; 张婷婷 1; 张慧超 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:6 页码:954-961
中文摘要	以环青海湖区1.49*104km2为研究区,选取轨道号为132/34,133/34,133/35,134/34的1987年和2006年2个时期的Landsat-5TM影像,并以全球数字高程模型(GDEM)为数据源,结合1:50000地形图,植被类型图等数据,获取了该区14种土地利用/覆盖类型,遥感解译的总体分类精度为81.81%和79.37%, Kappa系数为0.80和0.78.再根据青海湖区各地风沙活动的强度,参考已有的划分标准,得到环湖区沙漠化土地景观结果;以不同时期各沙漠化土地景观的归一化植被指数(NDVI)均值和坡向均值,高程均值等为区域观测值,计算了各种沙漠化土地景观类型之间空间自相关性Moran指数和NDVI均值与坡度,坡向,高程均值,出现频率最高的高程值之间的多变量自相关指数,分析了在20年间的动态变化特征.最后,基于各沙漠化土地景观的空间集聚分布特点及其生态意义,得出研究区景观结构稳定性分级图,提出了相应的生态保护措施
英文摘要	The study focuses on the peripheral regions of the Qinghai Lake (14 900 km2 in area) where experienced a rapid desertification in recent decades. 14 land use/cover types in the study area are derived by selecting the Landsat-5 TM images of the track numbers of 132/34,133/34,133/35 and 134/34 in 1987 and 2006 and tak-ing the global digital elevation model (GDEM),1: 50 000 topographic map and vegetation map as the data sources. The holistic classification accuracy is 81. 81% and 79. 37%, and the Kappa coefficients are 0. 80 and 0. 78, respectively. The results of sandy landscapes in the peripheral regions of the lake are derived based on the intensity of wind-blown sand in the study area and the reference of the available criteria. The typical values of normalized difference vegetation index (NDVI) in different periods, aspect and elevation of the sandy landscapes are used to calculate the spatial autocorrelation Moran indexes of the sandy landscapes and the multivariate autocorrelation inde-xes between the typical values of NDVI and the slope, aspect and elevation as well as the values of elevation with the highest frequency, and the dynamic change of the sandy landscapes in recent 20 years is analyzed. Finally,a classification map of landscape structure stability is charted based on the spatial concentration distribution and its ecological significance of the sandy landscapes, and some measures are put forward for conserving the ecology
中文关键词	空间自相关 ; 沙漠化 ; 景观格局 ; 风沙活动 ; 青海湖
英文关键词	NDVI spatial autocorrelation NDVI sandy landscape pattern wind-sand activity Qinghai Lake
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4048124
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225105
作者单位	1.青海师范大学生命与地理科学学院青藏高原资源环境研究中心, 西宁, 青海 810008, 中国; 2.中国地质大学(北京)地球科学与资源学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	马燕飞,沙占江,牛志宁,等. 环青海湖区沙漠化土地景观格局自相关分析[J],2010,27(6):954-961.
APA	马燕飞,沙占江,牛志宁,郭丽红,张婷婷,&张慧超.(2010).环青海湖区沙漠化土地景观格局自相关分析.干旱区研究,27(6),954-961.
MLA	马燕飞,et al."环青海湖区沙漠化土地景观格局自相关分析".干旱区研究 27.6(2010):954-961.