藏北地区草地退化空间特征及其趋势分析 | |
杨凯1; 高清竹1; 李玉娥1; 林而达1; 盛文萍1; 江村旺扎2; 王宝山2; 李文福2 | |
刊名 | 地球科学进展
![]() |
2007 | |
卷号 | 22期号:4页码:410-416 |
关键词 | 藏北地区 高寒草地 坡向 坡度 草地退化指数(GDI) 草地退化趋势系数 |
ISSN号 | 1001-8166 |
其他题名 | Spatial Distribution of Grassland Degradation and Trend in Northern Tibet |
英文摘要 | 根据草地退化国家标准和藏北地区草地退化实际情况,结合藏北地区1981-2004年多年遥感监测数据以及其它相关数据,采用遥感手段和GIS技术,分析藏北地区草地退化与坡向、坡度和海拔高度之间的关系;并计算藏北地区草地退化趋势系数,对该地区草地退化空间特征的趋势进行了分析.结果表明:在藏北地区,草地退化主要发生在平地(坡度小于1°)草地,平地的草地退化趋势比坡地显著,阳坡的草地退化指数(GDI)大于阴坡.在草地面积最大的4 500~5 250 m的海拔高度范围内,草地退化明显,草地退化趋势也显著.; Based on the remote sensing data derived from NOAA/AVHRR with a spatial resolution of 8 km of 1981-2000,SPOT/VGT with a spatial resolution of 1 km of 2001,and MODIS with a spatial resolution of 0.25 km of 2002-2004,as well as other related data of northern Tibet,spatial distribution of grassland degradation in northern Tibet was analyzed with the help of Geographical Information System.This study established a new method to calculate grassland degradation trend coefficient in the northern Tibet and analyzed the grassland degradation trend of this area.The result indicated that grassland degradation mainly occurred on flat(slope gradients <1) in the Northern Tibet and the grassland degradation index(GDI) was higher on the sunny slope than that on the shady slope;the trend of grassland degradation on flat was more significant than that on the slope.Grassland degradation mainly occurred on the elevations ranging from 4500m to 5250m where the largest grassland area is.In this area,grassland degradation is obvious and the trend of grassland degradation is considerable. |
学科主题 | 大气科学(气象学) ; 畜牧、动物医学、狩猎、蚕、蜂 |
语种 | 中文 |
内容类型 | 期刊论文 |
源URL | [http://111.203.20.206/handle/2HMLN22E/17428] ![]() |
专题 | 农业环境与可持续发展研究所_气候变化研究室 |
作者单位 | 1.中国农业科学院农业环境与可持续发展研究所, 北京, 100081 2.西藏自治区那曲地区农牧局, 西藏, 那曲, 852100 |
推荐引用方式 GB/T 7714 | 杨凯,高清竹,李玉娥,等. 藏北地区草地退化空间特征及其趋势分析[J]. 地球科学进展,2007,22(4):410-416. |
APA | 杨凯.,高清竹.,李玉娥.,林而达.,盛文萍.,...&李文福.(2007).藏北地区草地退化空间特征及其趋势分析.地球科学进展,22(4),410-416. |
MLA | 杨凯,et al."藏北地区草地退化空间特征及其趋势分析".地球科学进展 22.4(2007):410-416. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论