A Study On The Evaluation Methods And System Of Urban Land Intensive Use Potential

With the sustained and rapid development of China's economy, our industrialization, urbanization level increased significantly, which leads to a large demand for construction land. With the increase of urban construction land, the cultivated land resources decreases significantly, which leads to the problem on food security. Meanwhile, the common existing phenomenon is that China's stock construction land is in inefficient use, such as the old low-rise city buildings, the incomplete infrastructure, unreasonable layout of the building etc. Therefore, the configuration of urban land use like this will have a serious impact on the modernization of the city; meanwhile it will also cause the waste of land resources. To realize the sustainable utilization of urban land, we have to change the way of land use, follow the way of excavating connotation and using intensive land. The evaluation on intensive use of urban land can provide scientific basis for making management policies of urban land, and then it will play a fundamental role on the change of urban land use patterns.The evaluation of Intensive land use in ChengDu is mainly from two aspects : comprehensive assessment and the evaluation of homogeneous areas. Comprehensive evaluation is the macrocosmic evaluation of the land use from different areas in ChengDu while homogeneous zone evaluation is the microscopic evaluation from downtown area which takes sample area as a evaluation unit. Nine districts in ChengDu are considered as the objects of the comprehensive evaluation on the urban intensive land use. The evaluation content includes the comprehensive and intensive use and coordinated development of urban land from different districts in ChengDu by means of establishing evaluation index and on the basis of the P - S - R model intensive land evaluation. The evaluation of homogeneous area is on the basis of classifying the land uses of homogeneous areas, evaluating the land use of homogeneous area which takes the sample area as its unit by means of evaluation index; Measuring the developing potential on land use in ChengDu by Classifying the potential calculating areas on the basis of evaluation achievement in homogeneous area, which takes moderate and low utilization type as measuring object. On the basis of intensive evaluation and potential measurement, we put forward the measures on improving land intensive use by analyzing the existing problems on ChengDu's land intensive use.The main innovation achievements obtained are as follows:(1) Establish a set of evaluation index system of urban land intensive use initially Construct the evaluation index of urban land intensive use and homogeneous areas according to the analysis of influencing factors on urban intensive land use and by means of the combining classified indexes of the bearing capacity of land use, the land-use intensity, the land cost and other aspects.(2)Come up with the evaluation methods of urban land intensive use in homogeneous areas.Put forward the new method of homogeneous zone evaluation on urban land intensive use based on the idea that the areas of the same land-using quality should have the similar land use efficiency. According to the quality of land use conditions, classifying the homogeneous areas of urban land use firstly, then classifying the sample areas of different functions within the homogeneous zone, and finally evaluating the situation of land use by the sample zone evaluation unit.(3)Innovate the methods of identifying the reasonable amount of homogeneous areas evaluation on urban intensive land use.Establishment of reasonable evaluation index is key to an objective evaluation of urban land intensive use, and it is also the dilemma of evaluation study on urban land intensive use .Put forward the idea that the reasonable amount of evaluation index changes because of the different urban land use on homogeneous areas, innovate the methods of identifying the reasonable evaluation index according to the conditions of land use on homogeneous areas, and put forward the index correction model on the basis of the reasonable amount of urban land use on homogeneous areas.(4)Put forward the new potential calculation model of urban land intensive use.Put forward the potential calculating model of urban land intensive use on the basis of potential calculating classifications: the potential calculating models of intensity and quality of land intensive use. The potential calculation method of land intensive using intensity is the potential measurement on the land intensive use on condition of the utmost use of urban land. The potential calculation of land intensive using quality is the potential measurement on hypothetical condition of the utmost increase on the quality of urban land.