摘要
为了探讨海岸带土地资源动态变化,为生态环境保护提供依据,笔者以盐城市为例,利用1992年、2002年2期TM影像,采用最大似然法进行监督分类,解译出不同时期的土地利用图,并基于GIS的空间分析功能,分析盐城市土地利用类型变化的时空特征和规律。采用单一土地利用动态度来描述各种土地利用类型的变化速度。同时,基于统计年鉴分析了研究区土地利用变化的社会经济影响因素。结果表明:耕地和滩涂是面积减少最多的土地利用类型。耕地主要转化为林地、水域、建设用地和园地,而滩涂主要转化为盐田、养虾池等水域类型。建设用地是面积增加最多的类型,增加速度也最快,其主要转入来源为对耕地的占用。盐城市的土地利用变化是由人口的增长、政府规划与决策以及城市化的发展等因素综合作用的结果。研究区土地利用的变化特征不利于区域可持续发展,威胁到野生生物的生存环境,需要进行宏观调控和科学管理。
In order to investigate land resource change in coastal regions and provide basic data for ecological environment protection,the authors took the Yancheng city as an example and interpreted TM images of 1992 and 2002 by supervised classification using maximum likelihood method.GIS technology was employed to analyze land use change spatio-temporal characteristics.And dynamic degree model was applied to describe the change rate of each land use type.The driving factors of land use change were extracted based on the statistical data.The results showed that farmland and tidal flat had the largest decreasing magnitude.Farmland mainly transferred to woodland,water,construction land and garden plot.Tidal flat was transferred to waterbody,like salt pan and shrimp pond.Construction land had the largest increasing magnitude and velocity,which mainly diverted from farmland.Population expansion,government planning and urbanization can beviewed as the main driving factors of land use change in the study area.Land use change style in the Yancheng city was harmful to regional sustainable development and was dangerous to wild animals’survival.It was necessary to launch macro-control and scientific management.
出处
《中国农学通报》
CSCD
北大核心
2011年第4期464-468,共5页
Chinese Agricultural Science Bulletin
基金
南京信息工程大学科研启动基金(S8108175001)
关键词
遥感
土地利用
时空变化
盐城市
remote sensing
land use
spatio-temporal characteristics
Yancheng city
