干旱区生态环境知识资源中心(Arid): 近30a龙羊峡水库周边地区沙漠化遥感监测

Arid

	近30a龙羊峡水库周边地区沙漠化遥感监测
其他题名	Remote Sensing Investigation of Aeolian Desertification in Lonyangxia Reservoir Region in Recent 30Years
	李森; 颜长珍; 宋翔; 谢家丽; 段翰晨
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2011
卷号	31 期号:4 页码:836-841
中文摘要	在RS和GIS支持下,选取4期遥感数据,采用室内解译和野外检验修正的方法,获得龙羊峡水库周边地区不同时期土地沙漠化数据库。结果显示,在过去30a中,龙羊峡水库周边地区土地的沙漠化在时间上经历了一般发展到正在逆转两个阶段;2000年以后,极重度沙漠化土地和重度沙漠化土地变化最为明显,均呈现逆转趋势,其中极重度沙漠化逆转为其他类型的总面积为145.90km2,重度沙漠化土地逆转为中度沙漠化面积为146.44km2;在沙漠化土地的空间分布上,过去30a里,沙漠化土地主要集中分布在龙羊峡两岸的塔拉滩和木格滩地区;研究区内沙漠化的逆转主要是由重度和极重度沙漠化土地转变为中度和轻度沙漠化土地。19751989年,研究区的降水呈增加趋势,但是由于这一时期人为因素的影响,沙漠化呈不断加剧的态势;19892000年,研究区的气候趋向于暖干化,加上过度放牧等人为因素,重度和极重度沙漠化土地持续发展;2000年以后,研究区的气候趋向于暖湿化,政府实施了一系列生态环境保护、恢复计划,沙化土地呈现逆转的态势。
英文摘要	In this paper,satellite images interpretation and GIS analysis were used to obtain the data of aeolian de-sertification land in Longyangxia reservoir region in1975,1989,2000 and 2005.The results showed that the varia-tion of total area of aeolian desertification land experienced two stages from slowly development to preliminary rever-sal in the past 30 years;some severe desertification and extremely severe desertification had been reversed since 2000;The aeolian desertification land was mainly distributed in the Talatan and Mugetan;Reversal was mainly from severe and extremely severe aeolian desertification lands to moderate and slight aeolian desertification lands.Though the precipitation in the study region increased from1975to1989,the aeolian desertification land grew because of the impact of human factors.From1989 to 2000,because of the climate condition of warming and drying and overg-razing,severe and extremely severe aeolian desertification lands developed continually;After 2000,the present stuation of aeolian desertification had been reversed because the climate condition tended to warn and wet and the gov-ernment took a series of ecological environment protection and rehabilitation measures.
中文关键词	龙羊峡库区 ; 遥感监测 ; 沙漠化 ; 动态变化
英文关键词	Longyangxia reservoir region remote sensing investigation aeolian desertification dynamic variation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4235939
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227526
作者单位	中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	李森,颜长珍,宋翔,等. 近30a龙羊峡水库周边地区沙漠化遥感监测[J]. 中国科学院西北生态环境资源研究院,2011,31(4):836-841.
APA	李森,颜长珍,宋翔,谢家丽,&段翰晨.(2011).近30a龙羊峡水库周边地区沙漠化遥感监测.中国沙漠,31(4),836-841.
MLA	李森,et al."近30a龙羊峡水库周边地区沙漠化遥感监测".中国沙漠 31.4(2011):836-841.