基于改进TOPSIS模型的大庆市城市土地利用绩效评价及障碍度诊断

城市土地利用绩效评价及其障碍度诊断是实现城市土地可持续利用的重要依据。以大庆市为研究区，构建基于土地投入水平、土地利用程度、土地利用效益、土地利用生态可持续性的城市土地利用绩效评价指标体系，采用改进TOPSIS模型评估大庆市在2001—2010年的城市土地利用绩效状况，并运用障碍度模型分析诊断其障碍因子。结果表明，十年间大庆市城市土地利用绩效呈现上升态势，绩效指数从2001年的0.290 0增加到2010年的0.715 4，城市土地利用绩效由低级水平发展到良好水平；土地利用程度和土地利用生态可持续性的障碍度总体呈增长趋势，年均速分别为1.91%和1.38%；土地利用效益和土地投入水平的障碍度总体呈减少趋势，年均速分别为2.52%和0.76%；土地利用程度对未来城市土地利用绩效的影响最大，提高土地利用程度对促进城市土地利用绩效提升至关重要。

Evaluation of Urban Land Use Performance Based on the Improved TOPSIS Model and Diagnosis of Its Obstacle Degree in Daqing

Evaluation of urban land use performance and diagnosis of its obstacle degree are the important basis for sustainable land use. We selected Daqing City as the study area. The evaluation index system was built based on land use input level, land use degree, land use benefit, and land use ecological sustainability. The improved TOPSIS model and obstacle degree model were used to assess urban land use performance and diagnose its obstacle indicators of Daqing City from 2001 to 2010. Results showed that,during the period from 2001 to 2010 the level of urban land use performance in Daqing was generally increasing, with the performance index increasing from 0.290 0 to 0.715 4; the urban land use performance experienced low level to good level; the obstacle degree of land use degree and land use ecological sustainability increased by the annual average of 1.91% and 1.38%, respectively, but the obstacle degree of land use benefit and land use input level decreased by the annual average of 2.52% and 0.76%, respectively. The land use degree was found to be the major obstacle degree on affecting future urban land use performance, increasing the land use degree was crucial to the urban land use performance improvement.