干旱区生态环境知识资源中心(Arid): 藏北中部地区草地退化遥感监测

Arid

	藏北中部地区草地退化遥感监测
其他题名	Remote Sensing Monitoring of Grassland Degradation in the Central of the Northern Tibet
	李亚楠 1; 张丽 1; 廖静娟 1; 王翠珍 2
来源期刊	遥感技术与应用
ISSN	1004-0323
出版年	2013
卷号	28 期号:6 页码:1069-1075
中文摘要	为了探讨藏北中部地区近20年来的草地退化状况及主要驱动力,基于1990、2000及2010年的Landsat影像,采用混合分类方法对研究区主要景观类型进行分类,并利用景观指数分析景观格局及草地退化特征。另外,基于气象数据,利用灰色关联度方法分析草地退化的主要驱动力。结果表明:草地退化面积在1990~2000年呈增加趋势,在2000~2010年呈减少趋势,2000年之后研究区草地退化状况趋于缓和。造成草地退化的主要气候因素为降水量、气温、日照时数、平均相对湿度和蒸发量等,其中,高寒草甸草地主要受平均相对湿度及降水量的影响,高寒草原草地受蒸发量、日照时数、平均最低气温、降水量、平均相对湿度和平均最高气温的影响均较大,高寒荒漠草地与平均最高气温、日照时数和蒸发量的关系最为密切。
英文摘要	Northern Tibet is located in the hinterland of the Qinghai-Tibet Plateau,and abounds in grassland resources.While in recent years,Northern Tibet has experienced serious grassland degradation.In order to investigate the grassland degradation and its main driving factors in the central of the Northern Tibet during recent 20 years,the grassland landscape were classified using hybrid classification method and Landsat images for years of 1990,2000 and 2010.The classification accuracy was 78.0% based on the field data in 2010.The characteristics of the landscape patterns and grassland degradation were analyzed through calculating landscape indices,which included dominance index,evenness index,fragmentation index and diversity index.Finally,the main driving force for the grassland degradation was discussed using the Gray correlation method and the meteorological data.The results showed:the area of degraded grassland increased in 1990~2000,while decreased from 2000 to 2010.After the year of 2000,the grassland degradation is easing due to grassland restoration measures and grassland contract responsibility system.The change of climate has great influence on grassland degradation,and the major influence factors are precipitation,temperature,sunshine duration,and evaporation.The alpine meadows grass was mainly influenced by the average relative humidity and precipitation.The alpine grassland grass was mainly influenced by evaporation,the average relative humidity,precipitation,average minimum temperature,average maximum temperature,and sunshine duration.The desert grass has a close relationship with the average maximum temperature,sunshine duration,and evaporation.
中文关键词	混合分类 ; 景观分析 ; 灰色关联度 ; 驱动力分析
英文关键词	Hybrid classification Landscape analysis Gray correlation Driving force analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:5012411
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230386
作者单位	1.中国科学院遥感与数字地球研究所, 中国科学院数字地球重点实验室, 北京 100094, 中国; 2.美国密苏里大学哥伦布分校地理系, 密苏里州, 65211, 美国
推荐引用方式 GB/T 7714	李亚楠,张丽,廖静娟,等. 藏北中部地区草地退化遥感监测[J],2013,28(6):1069-1075.
APA	李亚楠,张丽,廖静娟,&王翠珍.(2013).藏北中部地区草地退化遥感监测.遥感技术与应用,28(6),1069-1075.
MLA	李亚楠,et al."藏北中部地区草地退化遥感监测".遥感技术与应用 28.6(2013):1069-1075.