关键词: 居民点整理, 理论潜力, 现实潜力, 布局优化, 江都市

Abstract:

The urbanization and industrialization needs a large number of land resources to support, so there is much land from agricultural use into non-agricultural purposes, result of which is a large quantity loss of cultivated land and too much construction land. New construction land space is limited, so it is have to reuse the inefficiency stock of construction land, namely rural residential land to support the urbanization process. The advancement of rural residential land consolidation not only increases the quantity of cultivated land, ensures the land demand of city and town growth, but also is an important way to speed-up the urban and rural co-ordination development and the new rural construction in China. The study of potential estimation and layout optimization of rural residential land consolidation is the important basis and key technology of residential land consolidation plan, then this paper is to research the two parts. With per capita residential land in present minus per capita standard stipulated by the State, the paper estimated the theoretical potential of rural residential land consolidation in Jiangdu City, considering restraint correction coefficient of the natural, economic and social constraints which was used to amend the theoretical potential to reality potential. Getting rid of reality potential from present rural residential land was the retained residential land; the next step was to make this part of land reallocation in space. So the paper optimized the residential land layout from location, nature and other aspects, using multi-factor comprehensive evaluation method to evaluate the fitness of settlement construction of grid cells in ARCGIS 9.3, Which weights was determined by Delphi method, and then making the highest fitness grid cell into residential land until the total chosen grid areas was equal to the result of status rural residential land minus reality potential. It was found that the theoretical potential of residential land consolidation of Jiangdu City in 2008 was 6 128 ha, while the reality potential amended by restraint factors was 2 013 ha, and more than half of which was in Xiannv town, which demonstrated Xiannv was centre of gravity of residential land consolidation in Jiangdu future. The distribution of residential land became concentrated after layout optimization, mainly concentrated around the towns or in convenient traffic areas, and had changed the current scattered distribution and reduced the number of plaques so as to make a significant increase in degree of concentration.

Key words: rural residential land consolidation, theoretical potential, reality potential, layout optimization, Jiangdu City