| With the social and economic development, cities have become the most important human settlements, expansion of urban space has become the focus research field in Urban Planning, Urban geography, Economics, Ecology, Management and many other subjects. Urban spatial expansion process can directly reflect the urban population distribution, land use, economic cultural and industrial distribution, analyse and simulate the process of urban expansion, not only deepened the understanding of the process of urbanization, but also infer the future city form. Moreover offer the basic data for the city's reasonable and sustainable development.This article research area contain three different types cities in the industrial corridor Hadaqi,they are Harbin, Daqing and Qiqihar. we used computer automated classification and manual method to interpretate the Landsat TM / ETM + remote sensing image in 1990, 2000, 2005 and 2009.we use fractal algorithm and buffer analysis to compare the differences in the city boundary morphology and spatial expansion. In order to get urban internal structure and spatial distribution , we choose four 2.5-meter spatial resolution's SPOT images for urban land use information extraction,get the spatial data from the land use and landscape pattern changes to quantify the different types of urban landuse changes and landscape pattern changes. Compare the different from the number and spatial distribution to reveal the nature urban growth and the regular pattern of urban expansion. What's more, we combined with statistical data correlation and regression analysis to obtain the relevant factors affecting urban growth, used the urban dynamic change model (Dynamic Urban Evolution Modeling, DUEM) simulation and prediction urban development and changes in the next 50 years the trend. The results show:1. The process of urban expansion in Harbin through the edge of fill, extension-type extension to the relatively stable phase. Daqing urban spatial expansion process through the internal fill, extension-type extended to the edge of filling phase; The process of urban expansion in Qiqihar continued realization of extension for the extension types . 2. The direction of Harbin expansion is northwest to the southeast. The direction of Daqing expansion is northeast, and it is southeast in Qiqihar. From the three cities' spatial location, we can see that the direction of the three cities expand become a gravitational force in adjacent cities to each other.3. Using correlation analysis, stepwise regression analysis to obtain the driving force of urban expansion, the factors including population, GDP, the proportion of primary industry, per capita living space are the same dominant factor in these three cities. Tertiary industry and the number of cars are the H secondary effect of urban expansion factor in Harbin. Oil output is the secondary effects of urban expansion factor in Daqing. Proportion of primary industry, secondary industry accounting for space are the secondary factors in Qiqihar.4. When we use the DUEM model prediction the trend of urban expansion, we got the results that the policy direction and the traffic factors significant affect the urban expansion in Harbin. The urban space expansion along the airport expressway, national highway G102, national highway G302, Acheng Highway southwest.Daqing Urban Space effect by natural factors (water), the urban space expansion along the Harbin-Daqing Expressway in the northwest and southeast. Qiqihar city space mainly effect by the policy orientation and the impact of urban spatial location of each region. The urban expansion in the rectangle which surrounded by the national highway G015, provincial highway S302, Binzhou Railway and Pingqi Railway. The types of urban expansion is internal filling. |
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