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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (12): 246-251.

所属专题： 农业地理； 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

华东地区典型县域近20年土地利用动态变化分析 —以宜兴市为例

冉小伟,邓良基,潘根兴   

  • 收稿日期:2009-03-10 修回日期:2009-04-22 出版日期:2009-06-20 发布日期:2009-06-20

Analyzing of Land Use Change in in Classical County of East China of Region in nearly 20 years—take yixing city. for example

Ran Xiaowei,, Deng Liangji, Pan Genxing   

  • Received:2009-03-10 Revised:2009-04-22 Online:2009-06-20 Published:2009-06-20

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摘要： 摘要：以1987年和2007年的TM遥感图像为主要数据源，利用人工解译和监督分类相结合的方法提取宜兴市土地利用类型数据，采用GIS空间分析方法和数理统计方法分析了土地利用的数量、比例和结构变化，得到宜兴市近20年来土地利用时空变化特征。结果表明，近20年来宜兴市的土地利用总体变化趋势是耕地面积急剧下降、建设用地和水域面积都有大幅度增加、林地和园地的面积变化不大；土地利用类型之间的转移主要是水田向建设用地和水域转移，林地向园地和建设用地转移，旱地和未利用地主要是向其它地类单向转出；宜兴市20年来耕地的平均年降幅为1.76%，建设用地增长幅度的平均年增幅为4.05%，变化幅度均远超过全国平均水平。

关键词: 粗纤维, 粗纤维, 结构层次, 游离型, 结合型

Abstract: Abstract：Spatial and temporal variation features of land use pattern in Yixing city in recent 20 years had been carried out, based on the data source of TM image in 1987 and 2007. The data of land use pattern in Yixing was extracted by the combined method of artificial interpretation and supervised classification, and changes of amount, proportion and structure of land use pattern were analyzed through GIS spatial analysis and mathematical statistics. The results showed that lowland fields, construction lands, water areas, and woodlands accounted for 32%, 27.31%,19.47% and15.45% of the total area, respectively, occupying the dominant position in the land utilization status in Yixing in 2007. Conclusively, the arable area sharply declined while construction lands and water areas increased significantly in recent 20 years’ land use condition in Yixing. However, the area of woodlands and garden plots changed slightly. The annual average decreasing amplitude of arable area is 1.76% while the construction lands had an annual average amplitude of 4.05%, which were both far beyond the national average level.