Research On The Land Use Structure In Yunnan Dali

The change of land use and research in land structure is currently being a hot spot and the forefront issues in globalization research, the land use/land cover changes (LUCC) is one of the important field in global change research. It is also one of the breakthroughs from the natural, social and economic aspects of global and regional environment, the purposes of the research is to explain the interaction between earth's environment system and production system. This paper adopts Dali prefecture land statistics change data and statistics yearbook of the relevant data in 1996-2008. To analyze Dali prefecture land-use change of time in recent 14 years. To find out the situation of land-use change, and use the principal component analysis method to analyze land-use change affects, For Dali prefecture land use provide the sustained and healthy development practical basis.In this paper, based on the research on natural, social and economic characteristics of Dali prefecture domain, make a detailed analysis and diagnosis of all counties of various land use status, to find out existing problems in land use in Dali prefecture, and construct information entropy model of land use structure from three angles:Based on degree of order of each region land use system; Based on degree of order of all kinds of land type; Based on dynamic evolution of land use structure of information entropy in time sequence of the last ten years. Analyze the land use information entropy value in Dali, seek the change law of the land use degree of order in Dali prefecture, at last used principal component analysis method to analyze the affects of land-use structure change, to find out the economic and social and environmental related factors influencing the changes of land use of Dali prefecture, draw the conclusion. For providing basis on making the land use decision. The main conclusions are as follows:(1)Current land use investigation and analysis shows that, the land use exist the following issues:first, geomorphic complicated in Dali; Second, the land use structure is unreasonable; Third, the land development way is extensive running, land output low: Fourth, frequent natural calamities, congenital deficiency on land use foundation; Fifth, the sustainable utilization in ecologically sensitive space is challenged.(2) Based on the land use structure information entropy analysis of various regions Dali prefecture shows that land use structure in Dali prefecture, the information entropy of Binchuan county, Nanjian county and Eryuan county are higher than the other place, the information entropy of Yangbi county and Yunlong county are relatively low, land use system orderly degrees are relatively high.(3)Based on the land use structure information entropy analysis of all kinds of land type shows that, according to each region of Dali prefecture, take the whole information entropy speaking, grassland average entropy value is the largest, the information entropy of cultivated land takes second place, and then followed by forest land, land for residential areas and independent mining land and other agricultural land and garden land.(4)Based on the analysis of land use structure information entropy in time series data for the last ten years in Dali prefecture, the land use information entropy has sharply decline-rapid rise-slow rise-rapid rise-are currently in fluctuation slow increase stage.(5)Analysis for driving force that influence on the land use structure evolution in Dali prefecture shows that, there are three kinds of driving force, driving force of natural environment, driving force of policy and system, driving force of economic and social development.