干旱区生态环境知识资源中心(Arid): 利用TM系列影像监测盐碱化土地变化以民勤绿洲为例

Arid

	利用TM系列影像监测盐碱化土地变化以民勤绿洲为例
其他题名	Study on the saline soil changes using TM in Minqin Oasis,Northerwest China
	韩惠 1; 冯兆东 1; 俄有浩 2; 马世英 3; 李常斌 1
ISSN	0455-2059
出版年	2006
卷号	42 期号:4 页码:1-6
中文摘要	选择盐碱化灾害严重的民勤绿洲地区,结合植被指数和地面温度以及目视解译的土地利用图,对4个不同年份的TM遥感影像进行信息压缩与提取,完成土地利用与覆盖的自动分类,获得不同时期、不同程度的盐碱化土地面积,进行对比分析.选择两个典型地区,结合气象、经济、地下水等观测和统计资料,研究盐碱化土地面积变化的成因.结果发现民勤绿洲地区的盐碱化土地面积一直处于下降趋势,地下水是影响土地盐碱化变化最主要的因素.
英文摘要	Salinization is one of the serious disasters in Minqin Oasis Region, Northwestern China and it has a close relationship with not only natural change but also human activity. In order to understand the changes of saline soil in this region we use four different years, TM images to get the land use maps. Temperature and NDVI are evaluated for the four years, which can highlight the saline land in the two dimensions. Erom the reflective images we get principal components and select the first three principal components, NDVI and temperature for classification. Referring to the laud use maps derived from visual-interpretation, we use supervised classification to set up rules and classifiers and finally get the distributions of saline land of Minqin Oasis in the four different years. The changes in saline land are diagramed, which tells us that the trend of saline land in Minqin Oasis Region is reduced from 1987 to 2000. Two typical regions, namely Baqu and Huqu, are discussed, showing the different changes in saline land in the south and north of Minqin Oasis. Compared with the changes of groundwater level, saline lands have been reduced with the reduction of groundwater, which indicates that both places have a similar trend and groundwater is the main factor that influences saline lands in the study area. Besides, natural and manmade influences are discussed.
中文关键词	盐碱化 ; TM影像 ; 归一化差值植被指数 ; 温度 ; 地下水 ; 民勤绿洲
英文关键词	salinization TM NDVI temperature groundwater Minqin Oasis
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:2418847
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/2XILL650/219914
作者单位	1.兰州大学, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国; 2.甘肃省荒漠化防治重点实验室, 甘肃省荒漠化防治重点实验室, 武威, 甘肃 733000, 中国; 3.兰州大学,学生处, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	韩惠,冯兆东,俄有浩,等. 利用TM系列影像监测盐碱化土地变化以民勤绿洲为例[J]. 兰州大学,2006,42(4):1-6.
APA	韩惠,冯兆东,俄有浩,马世英,&李常斌.(2006).利用TM系列影像监测盐碱化土地变化以民勤绿洲为例.,42(4),1-6.
MLA	韩惠,et al."利用TM系列影像监测盐碱化土地变化以民勤绿洲为例".42.4(2006):1-6.