基于遥感的区域景观特征及其动态变化研究——以重庆市北部新区为例

在RS和GIS技术的支持下，以1997年、2000年和2002年TM图像为数据源，利用平均斑块面积、分维数、块斑伸长指数、景观多样性指数、蔓延度和破碎度指数等景观特征指标，从多个层面对重庆市北部新区区域景观特征及其动态变化进行了研究。结果表明，在5a时间内，区域景观特征发生了很大变化，已经从城乡过渡带景观演变为快速城市化的城市景观。主要表现为各类城市建设用地不断扩大，呈现出空间集中化的特点，耕地和绿地在区域发展过程当中扮演着用地来源的角色，逐步被蚕食、分割，区域生态环境遭到破坏。

RESEARCHES ON CHARACTERISTICS AND DYNAMIC CHANGES OF REGIONAL LANDSCAPE BASED ON REMOTE SENSING -- A CASE STUDY OF THE NORTHERN PART OF CHONGQING CITY

On the basis of RS and GIS technology, Such indexes as mean area per patch, fractal dimension, patch elongation, diversity, contagion, fragmentation and the TM images in 1997, 2000 and 2002 were used to study the regional landscape characteristics and dynamic changes of the northern part of Chongqing city. The results show that the regional landscape characteristics experienced deep changes in five years, from an urban-rural transitional zone to a rapidly urbanized landscape. Various kinds of urban areas are expanding persistently and become spatially centralized. On the other hand, the cultivated land and woodland were divided up and nibbled at, which damaged the regional ecological environment.