Study On The Relationship Between Land Use Degree And Effect Of Yan'an

With the sustained fast development of national economy and society, a state of imbalance is appearing between the growing demand and scarce supply of land resources, so how to make use of land resources intensively and efficiently to improve the land use efficiency has become the first and core issue to realize the sustainable utilization of land resources. Yan'an is the revolutionary sites, red tourist destination, the western major cities, one of the important supply of the "West-east coal, "and"West-East natural gas transmision", an important part of the base construction, So how to provide effective guarantees for the city development just in limited land resources, it is limited the need for a more rational land utilization, land utilization adjustments unreasonable structure, improve the utilization of land and improving land utilization efficiency and coordination. The all need for land use degree and effect in Yan'an is the prerequisite for an evaluation to find an relationship between them and a certain dynamic law, the law made by the scientific utilization of land in Yan'an of countermeasures and suggestions.Based on land use change data and socio-economic statistical data,the paper first uses the improved model of Liu Jiyuan land use degree composite index and the method of composite the multi-factor to assess land use degree and benefits of Yan'an,then uses models of dynamic coupling to study the relationship between them for the sustainable development of local eco-economy, society and environment. Through the research and analysis, Overall,from2000 to 2007years,the extent of land use of Yan'anwas first decreased and then increased comprehensive benefit of land use was an increasing trend year by year, degree of coordination of land use efficiency was first decreased and then increased and then decreased. The composition of land use and effectiveness in complex systems of land is in the development of the coordinated development of the transition period to limit the future there is great uncertainty.lt provides important basis for us to understand the current situation of the land use degree through advising the suggests to increase land resources and socio-economic achieving sustainable development. It is of important practical significance as the sustainable utilization of land resources and the development of the regional economies.