摘要
采用新疆艾比湖湿地保护区的1972年Landsat/MSS、1990年的Landsat/TM、2001年和2006年的Landsat/ETM+遥感数据,利用RS与GIS技术,对研究区的遥感影像进行处理及湿地信息提取。在图像预处理时通过分析Landsat/MSS/TM/ETM+各波段之间相关系数来选择最佳波段;在湿地信息提取技术方面,采用监督分类中的最大似然法进行分类提取湿地信息,并对湿地信息动态变化进行研究。结果表明:在30多年间,研究区湖泊湿地面积经历了迅速缩小、基本稳定、逐步增大3个阶段;1972—2001年沼泽湿地和河流湿地面积持续增加;2001—2006年沼泽湿地面积小幅减少,河流湿地面积保持稳定;1972—2006年人工湿地、绿洲、农业用地面积呈现逐渐增加趋势。
In this study, remote sensing data of the Landsat/MSS image in 1972, the Landsat/TM image in 1990, and the Landsat/ETM＋ images in 2001 and 2006 of the Ebinur Lake Wetland Reserve in Xinjiang were selected as the source data, and the RS and GIS technologies were used to extract the wetland information and process remote sensing images of the study area. The best band was selected by analyzing the correlation coefficients between each band of Landsat/MSS/TM/ETM＋ when the images were pre-processed. As for the wetland information extraction technology, the maximum likelihood method of supervised classification was used to extract and classify the wetland information and analyze its dynamic changes. The results show that the study wetland rapidly diminished initially, then remained basically unchanged, and finally increased gradually. The area of the marsh wetland and river wetland continuously increased during the period from 1972 to 2001. The area of the marsh wetland decreased slightly from 2001 to 2006, and the area of the river wetland remained unchanged. The areas of the artificial wetland, oasis, and agricultural land showed a gradually increasing trend from 1972 to 2006.
出处
《水资源保护》
CAS
2014年第2期57-61,共5页
Water Resources Protection
基金
国家自然科学基金(40371082
41361043)
国家自然科学基金重点项目(NSFC-联合项目u1138303)
新疆维吾自治区重点实验室开放基金(XJDX0909-2010-01-)
新疆师范大学博士点开放课题(XJNU-DJ-201302)
关键词
遥感
地理信息系统
湿地
信息提取
面积动态变化
新疆
艾比湖
remote sensing
geographic information system
wetland
information extraction
dynamic areachange
Xinjiang
Ebinur Lake
