城市建设用地扩展研究——以重庆市渝北区为例

利用1996—2004年的统计和普查资料、土地利用调查数据，对重庆市渝北区8年的建设用地动态变化，扩展成因和建设用地扩展存在的问题进行了分析．结果表明：重庆市渝北区建设用地扩展与经济发展水平（GDP）、固定资产投资、人口和城镇化等密切相关；渝北区建设用地规模扩展，存在着局部浪费、粗放利用的问题以及建设用地无限制外延扩展占用了大量的耕地等问题；节约和集约利用土地是缓解土地供需矛盾，保障新时期社会经济持续稳定发展的必然选择．

Research of the Expanding of City Constructive Land——A Case Study of Yubei Borough, Chongqing City

According to statistical and survey data, land use survey data from 1996 to 2004, the variety of constructive land , the reasons and problem of expanding and in the region of Yubei in Chongqing city during the last 8 years are analyzed. The results show that the GDP, fixed assets, population and urbanization have a consanguineous relation with the expanding of constructive land in Yubei. The problem is partial waste, extensive using, impropriate lots of infield and so on in the expanding of constructive land. Land intensive and economical utilization is the necessity of solveing the inconsistency between land supply and land need, ensuring the social economy has a continual and steady development.