本文以遥感影像、野外调查和统计资料为数据源, 在ArcGIS 支持下, 建立以珠海市主城区为起点设置的不同方向的两个空间样带, 结合景观格局指数和空间梯度分析方法, 分析了珠海市城区景观空间格局沿梯度变化的规律。结果表明:珠海市城区15 年来城乡建设用地、道路和林地的面积均呈增加趋势, 农田、裸地, 水体、灌丛和滩涂等类型面积减小, 证明了研究时段内城市扩展在城乡交界区域明显;随着空间样带由城区中心向外围移动, 样带上建设用地的面积均下降, 农田面积逐渐上升, 表明了珠海城市化的发展具有一定的梯度性和方向性。通过空间格局梯度变化特征的分析, 能够定量化地分析珠海城市化进程的发展, 对于珠海的城市规划与管理具有重要理论意义。
Based on RS images, field survey, and statistics data, this paper analyzed the variation rules of landscape spatial pattern in different gradients in the urban area of Zhuhai, Guangdong Province, by using landscape pattern indexes and spatial gradient statistical analysis with the support of ArcGIS. The results showed that over the past 15 years, while the area of urban building, road and forest had been increasing, the area of farmland, bare land, water, shrub and beaches decreased gradually. The change of landscape pattern showed that urbanization was obvious in rural-urban fringe zone. The fact that the building area deceased and that the farmland area increased with the spatial sample moving from city centre to outer city showed that the gradient directions of urbanization were obvious. Via the analysis of the gradient variation of landscape spational pattern, we can quantitatively analyze the process of urbanization in Zhuhai. The study is significant to the urban planning and management of Zhuhai both theoretically and practically.
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