南京市近20年城镇用地扩展对土壤资源数量和质量的影响  

IMPACTS OF URBAN EXPANSION ON QUANTITY AND QUALITY OF SOILS IN NANJING IN THE PAST TWENTY YEARS

作　　者：檀满枝[1] 陈杰[1] 张学雷[1] 孙燕瓷[1] 黄辉[2] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) [2]南京农业大学资源与环境科学学院,南京210095

出　　处：《土壤学报》2005年第6期896-903,共8页Acta Pedologica Sinica

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-427);国家自然科学重点基金项目(40235054)资助

摘　　要：应用RS和GIS技术,基于1984年1、995年2、000年和2003年等四个时期的TM卫星遥感空间数据,采用多时相连续对比法分析了南京市过去20年来城市化与城镇扩展过程;同时,以南京市土壤图、全国第二次土壤普查数据为基础,并结合补充调查和采样分析数据,对南京市城镇扩展过程中土壤资源动态变化进行了研究。结果表明:过去20年南京市城市化发展速度较快,2003年全市城镇建成区面积较1984年增长近1倍;由于城镇规模的快速扩展,全市土壤资源总面积缩减7.4%,且城镇周边地区农业基础设施好、生产力水平较高的土壤资源缩减比例较大,对区域农业生产和粮食安全产生了不容忽视的影响。Based on spatial data originating respectively from the TM satellite images of 1984, 1995, 2000 and 2003, a multi-time-phase-successive-comparison study was conducted on urbanization and city sprawl in the Nanjing region using RS and GIS techniques. Meanwhile, impacts of city sprawl on the regional soil resources were analyzed based on data from the digital soil map of the city, files of the second national soil survey and supplementary investigations. Results obtained in the study indicate that the urban area of the city increased very fast in the past two decades, suggesting a rapid regional urbanization process. The total built-up area of the city increased by nearly 100% during the period from 1984 to 2003. As a result of the rapid urbanization, the soil resources of Nanjing reduced by 7.4 % in acreage. Especially, the soil resources with high productivity and favorable facilities in the suburbs were decreasing much faster because of their close contiguity to the expanding city. Finally, it might be concluded that rapid urbanization was posing an increasing pressure on soil resources, of which the impact on regional agricultural production and food security allows no neglect.

关 键 词：RS GIS 城市化 城镇扩展 土壤资源 南京市 

分 类 号：S159.2[农业科学—土壤学] P962[农业科学—农业基础科学]