城市地区景观的演变反映了人类活动对自然生态格局演替的人为干扰过程。由于人类活动的强度、频度及方式的差异,从半自然的农业生态景观演化为以人工建筑为主的城市生态景观的过程,可能呈现多样化的面貌。利用GIS技术将20世纪上半叶上海江湾五角场地区的土地利用状况逐年复原,发现其景观演变过程表现为由以农业生态景观为主转变为城乡景观杂错分布,并且这一进程因为各种政治事件的影响而呈现出明显的阶段性及空间差异性。揆诸史实,可知上海江湾五角场地区的城市化与城市空间的生产不仅是上海都市政治的产物,更是近代中国城市化的典型。
The evolution of landscape in urban area is able to show the disturbing process of the impact of mankinds activities on the succession of natural ecosystem. Due to the discrepancy in intensity, frequency and manner of mankind's activities, there were different looks in the changing from semi-natural agroecological landscape into urban ecological landscape where artificial structures dominated in. The study is to ral course of the landscape changes in Wujiaochang area in Jiangwan Town of Shanghai recover the spatio-tempofrom 1900 to 1949 by u- sing the GIS which based on the data collected from historical archives and old maps. The research has discovered that the evolutional transformation from rural landscape to urban landscape had created fragmentation of landscape and declination of ecological accessibility in the study area. This process laid out the multiple urban spatial structure of Shanghai City under the semi-colonial political pattern and the spatial typical structure in the opening ports of modem China. Urbanization in Wujiaochang area in Jiangwan Town was started by the Chinese local capitalists who grew up in Shanghai during the World War I, because the colonial capital was drawn back to their European motherland. However, in this area, large scale construction was brought up by National Government since 1929, as the area was chosen as the core of Shanghai Special Administrative City. This was included in the Metropolitan Shanghai Plan which was stirred up by the rising of nationalism in China. So the aim of the construction was to antagonize the settlement government. However, the urbanization of Wujiaochang Jiangwan Town was altered by the breaking out of war against Japan. During war time, the city center in area in the Plan was abandoned gradually, while in the southwestern part of the area, some Japanese military installations and residential quarter l~egan to build up. In a word, base on the study of urbanization in Jiangwan area, it is found out that, in modem China, the production of urban