Dynamic Evaluation Of The Urban Land Use Performance Of Lanzhou City

Land resources are the basis of all the economic activities. The accelerate economy development causes the contradiction between the supply and the demand of the land resources, which is increasingly prominent. The location of Lanzhou is unique and it is surrounded by mountains. The Yellow River flows through the city. Land resources of the city are relatively scarce. Studying the urban land use performance trend and analyzing the important factors which hinder land use are very important for the optimal allocation of scarce resources, rational use of land and improving land use performance level.27 single indicators, from five different aspects including the investment levels, use density, economic and social benefits, eco-efficiency and use structure, are selected to construct the evaluation index system of land use performance level. Time range is from 2000 to 2012. In this paper, the range method is adopted to normalize the data. The improved entropy method is used to calculate the weights of the 27 single indicators and the five criteria layer indicators objectively. The comprehensive index method is applied to reflect the performance level of the land use. The obstacle model is used to calculate the obstacle degree of the five criteria layer indicators and 27 single indicators from 2000 to 2012. The top five factors are listed and the frequency of the indicators appeared in the top five is counted.Based on the empirical results, the following conclusions can be obtained:(1) The level of the performance of Lanzhou urban land use has gradually increased. The level of performance in 2000-2002 is low, in 2003-2009 is intermediate and in 2010-2012 is good. (2) The five criteria layer indicators:the performance of land investment, economic & social benefits of land use, eco-efficiency of land use and land use density in 2000-2012 years show an upward trend. Only the performance level of land use structure contains decline stage and its performance is the lowest in the five criteria layer indicators, which maintains at this level in several years, only fluctuate slightly. (3) The obstacle degree of the five criteria layer indicators; the one that has the highest level of the obstacle degree is the land investment and the next is the eco-efficiency. Both of them have shown the downward trend in the volatility; the economic and social benefits of land use in 2011-2012 drops significantly. The obstacle degree of the land use density and land use structure are low. They have shown an upward trend, particularly the land use structure. (4) The obstacle degree of the 27 single indicators:environmental pollution control investment, fixed-asset investment, water quantity, industrial solid waste utilization, public green area, number of employees and the Engel coefficient are the important factors which impact the level of the performance of land use.The following suggestions are put forward to improve the performance of the urban land use: (1) The land investment level should be organized reasonably to achieve the intensive use of land resources. (2) The environmental pollution should be controlled to build a livable and pleasant city. (3) The income of low-income people should be increased to narrow the income gap. (4) The effective measures should be taken to attract talented people to achieve the balanced development of the employee quality and quantity. (5) To optimize land use structure and balance the proportions of the different kinds of land.