| At present, urbanization has already become one of the major manners for human to change the Earth and the land use/cover change in urbanization is also turning into one typically interactional process between human and the Earth. Therefore, how to highly reduce all kinds of destruction to physical environment and seek harmonious development between human and the Earth by the optimal land use/cover pattern with the support of the land use/cover dynamic model and the favor of the deep understanding of the land use evolution pattern, process and mechanism in urbanization becomes the key point of the land use/cover change research. As the most populous and developed city in China, Shanghai's landscape pattern has taken great place since liberated. The dissertation here carries out the systemic and integrative case study on urban land use and landscape evolution from 1947 to 2002 in Shanghai, with the aim of understanding the basic characteristics and rules of metropolitan land use evolution in China and furthering the current land use/cover change research.In chapter one, according to the background introduction of relative land use change research at home and abroad, urban land use change research trends and developments are reviewed from its pattern, process, mechanism and model aspects. It can be seen that current land use change research is very non-systemic, there isn't integrated and compared research on urban land use change with different regions and scales in theory, method and practice. Urban land use change research hasn't uniform and full theory system yet. The status of physical environment and land use pattern in Shanghai are summarized and the significance, purpose as well as contents of this research are brought forward in the end.In chapter two, on the base of all kinds of theory and method for land use/cover change research, the framework and conceptual model of urban land use evolution in dissertation are set up, the study flowchart and method for urban land use evolution in dissertation are advanced. It is considered that the study purpose is to understand characteristics and rules of urban land use evolution, thereby optimize the relationships between human and the Earth in urbanization and provide decision support for urban development.In chapter three, with the help of landscape ecology and spatial statistics, the grain effect, pattern characteristics and spatial heterogeneity of land use evolution of central area in Shanghai from 1947 to 2002 are studied with the integration of remote sensing data, digital map and other statistical datum. The results show: (1) The pattern characteristics of land use have distinct change with the increase in grain, therefore, different study scale and pattern index are used according to different study object and purpose when land use evolution is studied of central area in Shanghai; (2) In the past 50 years, the human activities in Shanghai are becoming stronger and stronger with the accelerating trend, the rapid growth of the urban land by encroaching ambient cultivated land andthe structure adjustment in central area are the main characteristics of land use evolution in Shanghai; (3) Landscape diversity and patch density have spatial heterogeneity, their spatial pattern and heterogeneity change in different sampling extent. The more fine the sampling extent is, the more detailed the characteristic of spatial heterogeneity is. The history of urban development and urban planning play an important role in growth of spatial pattern.In chapter four, the spatial growth process, rule and mode of built-up area in Shanghai from 1947 to 2002 are studied from the following three aspects: spatial difference of form growth, spatial growth characteristic of residential area and industrial area and spatial growth process and mode of built-up area. The results show: (1) The built-up area in different directions and their growth discrepancy are becoming greater and greater, spatial growth difference is the most greatest in SW-S direction and the most least in S-... |
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