Land Use Ecological Security Pattern For Central Arid Zone In Ningxia

Reasonable security pattern provide the basis for ecological management and technical support Technical for optimize land use, have a great significance to realize the regional sustainable development. The article choose a typical area of Farming-pastoral Zone——the Central Arid Zone in Ningxia, by analysis the actual ecological problems of land of researched region, as well as Ecology, Landscape Science, Sustainable development etc. Combining with the actual land use ecological problems in the study area, researching the characteristics change,ecological suitability,ecological safety and multi-objective programming of Land use, Constructing ecological security of land use pattern in the Central Arid Zone in Ningxia. the primary contents, Methods and conclusion for this thesis as follows:1) Chapter one discuss the current state, Methods and application areas about Land Use, Ecological Suitability Assessment, Ecological Safety Evaluation and ecological security pattern for land use for the land use of domestic and overseas.2) Chapter two Combine with the theoretical basis and The actual situation in the study area, Analysis and define related concepts.3) Chapter three analysis Ecological security problem in the process of Land Use. Based on the research, it was found that Water and Soil Erosion, Land Desertificationand Soil Salinization were the major problem.4) Chapter four using RS and GIS techniques. By calculating four times land-use transfer matrix and landscape pattern spatial features, revealing the land use Spatial change direction and quantity changes of research area.In order to provide basic data and comparison and optimization data for multi-objective programming model. The main conclusions of this chapter are the bellows:①During1989-2010, The land use structure change greatly in research area, on the whole, the roll in of forest land, grassland, Dry land and construction land are more larger than roll out; paddy field change roll in to roll out and water areas changed little.②From the point of landscape pattern, the index of landscape fragmentation and dominance Show a trend of decrease, the index of landscape diversity and landscape evenness tend to increase.5) Chapter five selectinggradient, Soil and It’s organic content, soil denudation and water resources, using GIS techniques, evaluating the cultivated land, woodland and grassland state of land use ecological suitability. According to the appropriate space of cultivated land suitability evaluation, results are divided into Five grades:high suitable zone, Moderate suitable zone, Critical suitable zone, Not suitable zone and especially not suitable zone; According to the appropriate space of woodland suitability evaluation, results are divided into two grades:high suitable zone, and Moderate suitable zone; According to the appropriate space of grassland suitability evaluation, results are divided intothreegrades:high suitable zone, Moderate suitable zone and Critical suitable zone. analyzed the area and topography of Every kind of suitability, provide space suitability distribution state for ecological security pattern of land use.6) Chapter six field survey and Four times Land-sat remote sensing interpretation, Based on the foundation of statistical data and the DEM data, building "pressure-state-response"(PSR)model, calculating land use ecological security status of the Central Arid Zone in Ningxia with the county as unit. Adopting analytic hierarchical programming(AHP)and expert consultancy to determine the weight. Using Weighted Sum Method confirm the ecological security level, via cluster analysis and divided the result into five grades:land use ecological safety zone, land use ecological relative safety zone, land use ecological critical safety zone, land use ecological insecurity safety zone and land use ecological terribly safety zone, provide space suitability security distribution state for ecological security pattern of land use.7) Chapter seven using multi-objective programming and GIS techniques, With the increasing percentage of vegetation, constructing Multi-objective programming model, regulating land use structure and land-use type In2020. Finally, The article based on the ecological security status of land use, combined with suitability status, present situation and The optimal allocation structure of land use, build ecological security pattern of cultivated land, woodland and grassland, To achieve the spatial allocation and optimization adjustment of land use in the research area.