珠江三角洲东部地区小城镇景观动态变化研究──以东莞市常平镇为例

Landscape Changing Research of Small Town in Eastern Part of Zhujiang Delta Area A Case Study of Changping Town, Dongguan City

选择景观变化剧烈的珠江三角洲东部地区常平镇为工作区，以１９８８～１９９６年６个时段的卫星影象数据为主要信息源，在地理信息系统技术的支持下，进行景观格局的动态变化研究．探讨了工作区景观的斑块面积、数量、多样性、优势度、均匀性、两种破碎化指数和两种形状指数的变化情况，从而总结出常平镇在从传统的农业景观向城镇景观转化过程中景观格局变化的一般规律性，为进一步的景观演化进程和组分转移模式分析奠定了基础．

This study choose the Changping town, situated in the eastern part of Zhujiang delta area, as the working area where the landscape changing seriously during the past 10 years. Based on 6 times of satellite remote sensing image data, and using GIS software MICSIS and CITYSTAR developed by Peking University, we carried out a landscape pattern changing study on the working area. Some landscape pattern indices such as patch number, patch area, diversity, dominance, homogeneity, 2 fragmentation indices(FN1 And FN2), 2 shape indices(S1 and S2) were used in this study, and finally we got some general conclusions from these indices. Changping town has been changing from traditional agriculture landscape to a new town landscape since 1988. During this changing period, its elements and pattern also changed tremendously as indicated by the landscape pattern indices. Natural and agricultural elements transmitted to new town area was the main process. Longtime human disturbance made the landscape looks more homogeneity, and more fragmented in the total structure, and less different between the elements and patches of the same element. Finally we resulted that 1991 and 1994 were key points of the landscape changing process in Changping town.