文献类型：期刊文献

中文题名：30a来共和盆地贵南县草地时空变化分析

英文题名：Spatio-temporal Change of Grassland Based on GIS and RS in 30 Years in Guinan County,Gonghe Basin

作者：冯益明[1] 卢琦[2] 王学全[2] 杨恒华[3] 孙德福[3]

机构：[1]中国林科院资源信息所／国家林业局林业遥感与信息技术实验室,北京100091;[2]中国林科院林业研究所／国家林业局林木培育重点实验室,北京100091;[3]青海省沙珠玉治沙站,青海共和813005

年份：2008

卷号：28

期号：2

起止页码：212-216

中文期刊名：中国沙漠

外文期刊名：Journal of Desert Research

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：“十五”国家攻关课题(2005BA517A07);“十一五”科技支撑课题(2006BAD26B01)共同资助

语种：中文

中文关键词：草地;时空变化;动态度;遥感影像;贵南县;共和盆地

外文关键词：grassland;spatio-temporal analysis;dynamic degree;remote sensing images;Guinan county;Gonghe basin

分类号：X87

摘要：草地资源分布和动态变化是荒漠化监测的重要内容。利用1976年、1996年、2001年、2006年四期遥感影像,在RS与GIS支持下解译提取了贵南县草地信息,通过动态度模型和空间变化分析了青海省贵南县草地资源变化。结果表明:30 a来青海省贵南县草地面积减少了12.62%,其中高盖度草地面积减少了28.87%;主要转化为耕地、未利用地和林地;1996—2006年,草地面积缩减趋缓。1976—1996年间有16.6%的高盖度草地退化为中低盖度草地;1996—2006年高、中、低盖度草地面积转换变化不大。通过草地斑块的重心分析显示草地空间变化向多个方向偏移。
Grassland distribution and change dynamics are main objects of desertification monitoring.By using four-period remote sensing images（1976,1996,2001,2006） and under the support of RS and GIS techniques,the spatial information of grassland during the past 30 years in Guinan County,Qinghai Province is interpreted and extracted,and the area,quality and spatial change pattern of grassland are analyzed in this paper.The results shows that： ①The grassland area was decreased by 12.62% in the past 30 years,and grassland degradation is serious,especially for high coverage grassland with a net decreasing rate of 28.87%;During 1976-1996,grassland is mainly converted into cropland,wilderness and forest land,and the converted area of the high coverage grassland occupied 85.9% of total converted area.During 1996-2006,the trend of grassland degradation is slow.②The grassland had greatly degraded from 1976 to 1996,the main reason was that 16.6% of high coverage grassland were converted into middle and low coverage grassland.In the period of 1996-2006,the change of the grassland dynamic degree was small and the area of different coverage grade grassland nearly kept stable.③The change of gravity center of grasslands is irregular and multi-directional because both natural factor and human actions take effect on grassland in the region.