Research On Land Use Benifit Evaluation Of Nan'an District

Nan'an district is an important part of Chongqing's main urban areas. In recent years, the regional socio-economic has developed rapidly, GDP grows at a rapid growth of more than 10% every year.In 2008, GDP has reached 22.58 billion yuan, and the per capita GDP has broken 3,000 dollars. Nan'an district has been equal to the level of a middle-development country. With the rapid socio-economic development, land resources is in great demand. But Nan'an district has a long history, the reserved land resources for development is limited. The contradiction between supply and demand is conspicuous, constraint of land resources on economic and social development is obvious, coupled with the unreasonable phenomenon in land use such as land waste, inefficient use of land resources, aggravated this problem.In the situation of the limited supply of land resources, the only way of meeting the demand of the socio-economic development for land resources, is potential excavation, ie,relying on increasing investment, and improving land use efficiency to incearse the potentiality of land use. Among them, land use efficiency evaluation is the key to solve this problem. Therefore, this paper takes land use of Nan'an district as a study,studying how to evaluate scientifically the effectiveness of land use and then put proposals for improvement of the efficiency of land use, with the purpose of providing references for Nan'an district' management of land use.In this paper, based on a clear understanding of land use status of Nan'an district, making the reference to related theories and researches, from the three aspects of the economic benefit, social benefit and ecological benefit, it selected 24 indicators to build evaluating indicator system of land resources use's comprehensive benefits of Nan'an district, and determined evaluating indicator's weight through using the way of union of the subjective and objective's assign, and evaluated the land use's benefits of Nan'an district during 2000-2008 using comprehensive index model, Then it carries on studying the barrier diagnosis of land use, and obtained the barrier factors that influence highly effective use of land. The main results are:during the studying period, the comprehensive benefits of Nan'an district's land use has been arising, from 0.1471 of 2000 increased to 0.9215 of 2008, an increase of 0.7743, and an average annual increase of 0.0968. From the point of growth rate, during the period of 2000 to 2005 is slower, 2006-2008 growth rate is faster. From the point of the three sub-effectiveness of land use, they were on the overall growth trends.Among them, the biggest increase is economic benifit, social growth in the middle, slightly lower growth is ecologic benifit.Based on a series of studies, taking the actual situation of Nan'an district into account, in order to promote the efficient use of land resources, this paper at its end made the following recommendations:To optimize and adjust land use structure, enhancing land use efficiency; to speed up industrial restructuring, promoting sustained,rapid and healthy development of economic; to strengthen the protection of agricultural land, especially farmland, improving agricultural ecological environment quality; to explore new mechanisms for land use, and actively carry out the experiment of the urban construction land increase with the rural construction land reduction; to intensify pollution control efforts and speed up the ecological environment construction, coordination of land use and ecological environment construction; and increasing the intensity of land-use management.