深圳市龙华地区快速城市化过程中的景观结构研究--城市建设用地结构及异质性特征分析

利用多时段景观遥感制图信息和景观格局研究方法 ,对深圳市龙华地区快速城市化过程中城镇建成区和新开发区两种建设用地类型的结构和空间分布特征进行了研究 .结果表明 ,两种类型研究期间斑块数量、平均面积大幅度增加 ,碎裂化程度不断降低 ;建成区增长主要有大型居民点持续扩张和独立小斑块不断产生两种模式 ,开发区建设的高峰时期是 1990～ 1994年 ;受地形和交通等因素的影响 ,建成区一直表现出显著宏观异质性分布特征 ,但孔隙度水平不断降低 ,中小尺度的分布差异仍然比较明显 ;新开发区受与建成区相同的约束条件限制 ,同样表现为宏观异质性特征 ,空间不均匀分布的表现尺度大于建成区 .工作区内因城建用地快速膨胀引起的各种生态问题急需通过土利用政策的调整加以解决 .

Landscape structure of Longhua area in Shenzhen City during fast urbanization process-Structure and heterogeneity analysis of urban construction area

Remotely sensed mappng information of multi period of time and methods of landscape pattern analysis were used to study the structure and spatial distribution characterisitcs of two types of land use,built up areas and new developing areas,during the fast urbanization process in Longhua area,Shenzhen City.The results indicated that from 1988 to 1996,the patch number and average size in the two types of land use increased significantly,but the fragmentation degree decreased. The increase of constructed land use could be divided into two patterns,continued expanding of big residential patches and continuous appearing of new isolated small patches,and most of the new developing area was constructed from 1990 to 1994.Under the impacts of topography and traffic,the built up areas showed macroscopic spatial distribution with decreasing lacunarity values.Distribution difference of constructed patches was very obvious in small and moderate scales.The new developing patches,affected by the conditions as the built up areas,were also characteristic of macroscopic heterogeneity,but the expression scale of heterogeneity was larger than the built up areas.The fast expanding of the constructed land use produced some very negative ecological problems,which should urgently be resolved by adjusting the land use polices.