山区县域土地利用垂直分异模型研究——以宜良县为例

Study on Height Differentiation Model of Land Use in Mountainous County Area——Taking Yiliang County as an Example

山区土地利用受高程及其潜在控制的自然因素影响较为明显,为探讨这一影响规律,选取宜良县为研究对象,利用GIS空间分析技术和数学统计方法,结合土地利用综合指数模型进行分析。结果表明,研究区土地资源在垂直方向的分布特征明显,按照低海拔、中海拔和高海拔分为三个空间带,土地利用主要分布在中海拔地区。单一土地利用类型受海拔高度的影响呈现出一定的差异性,土地的综合利用程度随高程的变化呈现出明显的规律性,用数学方法建立回归模型模拟这一规律,其结果为一元二次方程,且与研究尺度的大小无明显关系。研究成果对于西南山区土地利用的垂直分异的相关研究可提供一定的参考和支持。

Land use of mountainous areas is easily affected by elevation and other natural factors. In order to ex-plore the law of elevation impact to land use, we chose Yiliang County as the study area, using GIS spatial analy-sis techniques, mathematical statistical methods and land use degree model to analyse the area . The results show that the Yiliang County land resources distribution in the intervals of low-altitude, mid-altitude and high-altitude, vertical direction is obvious. It can be divided into three and the main land resources are distributed in the mid-altitude zone. The impact of different land use types by elevation shows some differences. Using mathematical statistical methods to build height differentiation model of land use degree, the outcome is a quadratic equation. Finally, the testing results indicate that the model performed well and there is no significant relationship between the research scale size and the model. This study may provide some reference and support for research of land use vertical differentiation in mountainous areas of southwest China.