摘要
选择上海市青浦区为研究区,通过严格配准Landsat5 TM遥感影像序列,运用PCA-ISODATA方法进行影像分类及后处理并进行实地验证,制成土地覆盖/利用图。结合相关资料、年鉴,利用地理信息系统分析了1998—2007年青浦区土地利用变化的时空分布特征及其驱动机制。结果表明:新千年后上海青浦区土地利用变化主要表现在城镇建成区的大面积联合扩展态势,以东北部尤为强烈,深受离市中心的距离驱动,且离道路越近的土地越容易转变为厂房建设用地;耕地面积减少显著;林地由于植树造林或林业经济有所增加;西部湖区水面有所增加,受历史驱动为主,亦受水产养殖所需。从社会经济数据看,第二产业与第三产业的GDP都翻了2番以上,非农人口成倍增长与这种土地利用变化模式相互印证。1998—2007年我国村镇城市化、人口向大城市区域聚集主导着这种土地利用变化模式。
Taking Qingpu District of Shanghai City as study area,based upon the accurate registration of Landsat5 thematic mapper imagery data of the study area,followed with PCA-ISODATA method for the classification of data and post processing and in situ investigation,the land cover/land use maps of specific years were obtained.Based on the relevant information and yearbook,the spatial and temporal distribution characteristics of land use change in Qingpu District and its driving mechanism during 1998-2007 were analyzed by GIS.The study showed as follows:when entering the new millennium,the main change was that the built-up expands great area and cohesion,especially in northeast of region;the built-up expansion was driven by distance to city center,moreover the closer to the roads,the easier built-up conversion from other landforms would happen.At the meantime,the agricultural land decreased drastically and woodland enhanced as forest planting or economy of forestry.Lakes and river networks in western region mainly driven by history,for the aquiculture,the water area was a litter increased.From social economic statistics,secondary and third industries were over 4 fold and non agricultural population doubled illustrates this change in ten years.Urbanization and the mass population gathering towards big city were leading this change pattern.
作者
李炫
李成
谢锋
LI Xuan;LI Cheng;XIE Feng (School of Rail Transportation,Soochow University,Suzhou,Jiangsu 215131)
出处
《安徽农业科学》
CAS
2018年第8期76-79,91,共5页
Journal of Anhui Agricultural Sciences
基金
江苏省自然科学基金青年基金项目(BK20130303)
作者简介
李炫（1994—），男，江苏盐城人，硕士研究生，研究方向：农业遥感、遥感应用;通讯作者，副教授，博士，硕士生导师，从事遥感应用研究
