干旱区生态环境知识资源中心(Arid): 19862015年民勤县绿洲时空变化分析

Arid

	19862015年民勤县绿洲时空变化分析
其他题名	Spatiotemporal Change of the Oasis in Minqin County during the Period from 1986 to 2015
	鲁晖; 颉耀文; 张文培; 卫娇娇
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2017
卷号	34 期号:6 页码:1410-1417
中文摘要	以19862015年7期Landsat TM/OLI影像为数据源,提取民勤县绿洲分布情况,分析其时空变化特征及成因。结果表明:近30 a民勤县绿洲面积除20052010年大幅度退缩外,其余时期均呈现扩张趋势,面积由1986年的767 km~2增长到2015年的1 360 km~2, 30 a增长了77.3%。绿洲与荒漠间的相互转化也很剧烈, 19902000年是绿洲与荒漠间转化最剧烈的时期;扩张绿洲主要集中在有水源保障的区域,多为移民及市场驱动所导致;退缩绿洲在2005年之前主要分布于绿洲尾闾及河道两侧,多为水资源短缺及自然因素所引起, 2005年之后全区域均大面积出现退缩,主要为生态治理等政策因素所导致,近30 a来民勤绿洲整体呈现出向南迁移的趋势;易变化绿洲主要分布于主体绿洲外围及荒漠中的零星绿洲。
英文摘要	In this paper,seven Landsat TM/OLI images during the period from 1986 to 2015 were used as the data sources to extract the distribution of the oasis in Minqin County,Gansu Province,on which the spatiotemporal characteristics and the causes resulting in the oasis change were analyzed. The results showed that the development of the oasis in Minqin County was trended growth except during the period of 2005 - 2010,and the area was enlarged from 767 km~2 in 1986 to 1 360 km~2 in 2015 and expanded by 77.3% in recent 30 years. The oasis area was changed significantly,at the same time,the transformation between the oasis and desert was also very intense,especially during the period of 1990 - 2000. The expanded areas were mainly distributed in the upper reaches where it was relatively rich in water resources,which was mostly driven by immigration and economic interests,especially in Nanhu Township located in the southeastern part of the main oasis,this expansion was very obvious. Before 2005,the shrunk areas of the oasis were mainly distributed in the tail of the oasis and the flood land along both riversides, which was mostly caused by abandoned land and the degradation of natural oasis. After 2005,the oasis was shrunk in large area in the whole region due to mainly the ecological governance policy factors. In the recent 30 years,the central position of the Minqin Oasis was migrated southward by a migration distance of 3.861 3 km. The regions without change formed the main body of the oasis in Minqin County,and the areas with easy change were mainly distributed in the peripheral zone of the main oasis and scattered in the desert.
中文关键词	绿洲面积 ; 动态度 ; 重心迁移 ; 时空变化 ; 民勤县
英文关键词	oasis dynamic degree immigration grid transformation Minqin County
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:6119914
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236032
作者单位	兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	鲁晖,颉耀文,张文培,等. 19862015年民勤县绿洲时空变化分析[J]. 兰州大学,2017,34(6):1410-1417.
APA	鲁晖,颉耀文,张文培,&卫娇娇.(2017).19862015年民勤县绿洲时空变化分析.干旱区研究,34(6),1410-1417.
MLA	鲁晖,et al."19862015年民勤县绿洲时空变化分析".干旱区研究 34.6(2017):1410-1417.