宁夏中部生态移民安置区土地利用结构合理性研究

Study on the rationality of land use structure in ecological resettlement area in central Ningxia

以我国最大的生态扶贫移民集中区——宁夏红寺堡区为研究对象,采用1995、2000、2005、2010和2015年5期遥感数据为数据源,基于TOPSIS模型,通过熵值法确定各指标权重,结合灰色关联度分析模型对红寺堡生态移民安置区土地利用合理性进行研究.结果表明:1995—2015年红寺堡生态移民安置区土地利用合理度先下降后上升,但整体呈现上升趋势;不同土地利用类型对研究区土地利用合理度的影响不同,草地、林地和建设用地与土地利用合理度的关联度最高,对土地利用合理度的影响最大,其次是耕地和水域,而未利用地最小;以研究区景观基质——草地为参考序列,对影响草地的其他土地利用类型进行灰色关联度分析,结果显示对草地影响最大的是耕地和水域,其次是林地,最后是建设用地和未利用地.

Based on TOPSIS model, five indexes of remote sensing data of 1995, 2000, 2005, 2010 and 2015 were used as the research object, and Hongsibu area, the largest ecological immigrant settlement area in China, was used to determine the weight of each index by entropy method. Correlation Analysis Model Comprehensive Study on Land Use Rationality in Hongsibu Ecological Resettlement Area. The results showed that the rationality of land use in the ecological resettlement area of Hongsibu increased firstly and then increased from 1995 to 2015, but the overall trend was rising. Different land use types had different impacts on the land use rationality in the study area, including grassland, woodland, The correlation degree between the construction land and the reasonable degree of land use is the highest, which has the greatest impact on the reasonableness of land use, followed by the cultivated land and water area, and the unutilized land is the least. Taking the landscape substrate-grassland of the study area as the reference sequence, The results showed that cultivated land and water area had the greatest impact on grassland, followed by woodland, and finally construction land and unused land.