Research On The Evaluation Of Urban Land Intensive Use Based On Fuzzy Comprehensive Evaluation

With the acceleration of urbanization process, the problems such as extension outspreading, extensive use and low efficiency appear in urban land use. On one hand, these problems seriously slow down the modernization of city, and on the other hand, cause vast waste of land resources. The research of the urban land intensive use evaluation is significant on the aspect, including protecting land resource, urban development, rational distribution of urban land, and optimization of the economic growth mode. This research is also of great importance to have an objective consciousness of current situation of urban land use, predict the development trend and efficiently mine the potential of urban land use to make the strategy of the sustainable development. Based on correlative information, data and academic methods about urban land intensive use, the database of urban land intensive use evaluation is established in virtue of advanced GIS technology. The fuzzy comprehensive evaluation method aiming at the multi-coupling and complexity of urban land use is proposed, which considers the uncertainty of evaluation subject, evaluation material and evaluation standards.The evaluation method firstly establishes evaluation factors and evaluation level classifications of urban land intensive use, and sets up the falling trapezoid subordinate function, and calculates the weight using principal component analysis, and gets the evaluation results by compound calculation. Secondly, it takes Nantong city as a sample to evaluate the function district of urban land intensive use. Finally, the results based on fuzzy comprehensive method are compared with which are calculated by the weighted index method.The main achievements are urban land intensive use evaluation model based on fuzzy comprehensive evaluation, the distribution graph and table of functional district type using Nantong land intensive use evaluation method and the comparing diagram of functional district evaluation results of Nantong city using fuzzy comprehensive evaluation method and weighed index method.It is investigated through theory analysis and experiment results that this model considers the fuzziness of the classification limit, which is scientific, simple and accurate. The results are similar to that based on the weighted index method, furthermore, they accord with the current condition of urban land use of Nantong city. Therefore, this method has great value on practical applications.