Studies On Evaluation Of The Exploitation And Utilization Of Reserved Cultivated Land Resources Based On GIS

In this thesis, Yuetang District of Xiangtan City is served as the area studied. According to the database of DEM, current land use, and soil survey, and take ArcGIS as the data precessing platform, we build the cultivated land reserve resources suitable for mechanization application development potential, from the following points:topography, soil conditions, vegetation, water resources conditions, location conditions, natural disasters and so on, then we take the result into three grade. Finally, we conclude that the numbers of reserve cultivated land resources distribution, mass distribution, space distribution. On this basis, we put forward to the model of reserve cultivated land resources development and utilization of Suggestions, in order to promote the cultivated and resources development, consolidation and reclamation for reference; At the same time, we provide the basis for realization of agricultural industrialization. The main researches are as follows:(1) We constructed the evaluation system of development and utilization of reserve cultivated land resources. With the practical situation of the study area, we selected the slope, elevation, land shall, soil thickness, soil texture, soil pollution, forest canopy density, water supply reliability, traffic conditions and natural disasters as the evaluation Factor. Finally we determine evaluation weights and scores by the analytic hierarchy process and expert scoring method, and establish evaluation index system through weighted model.(2)We establish the evaluation model of reserve cultivated land resources evaluation based on GIS. We take Yuetang District of Xiangtan City as the study area, we take the figures of elevation, slope data from DEM that resolution is the 30 meters; I build buffer analysis for the transportation, drainage; block shape analysis through resent land usage. At the same time, combined with the second census results, the soil layer thickness, texture, as well as corresponding layer on the analysis of the nine layers to overlay and to a resolution of 30 meters of raster data calculation one by one, the score of each cell, statistical analysis of the distribution of scores for each unit, through the frequency histogram of the total score each evaluation unit division suitability level interval, at all levels to adapt to the level of each unit, combining Yuetang District of Xiangtan City database reserve cultivated land resources, eliminate inappropriate development and utilization of land.(3) We concluded reserve cultivated land resources evaluation results that combined with application of agricultural machinery.(4) Suggestions in develop and utilize reserve cultivated land resources:1) The areas surrounding country is priority suitable for utilize; 2) promote navel Orchard, fluecured tobacco, the central region;3) promote the scale management;4) increase the intensity of the soil.