黄土地区地表形态指数的构建与实现

Construction and implementation of surface morphology index in loess area

为了研究黄土地区地表高低起伏、破碎程度,选取坡度、海拔高程、地表粗糙度、地表切割深度等单因素指标来综合量化地表形态指数.通过地理信息技术平台,以黄土地区数字高程模型和相关数据库为基础,进行了单因素指标的计算和提取,建立了地表形态指数的计算公式,实现了黄土地区地表形态指数的计算,得到了地表形态分布图.结果表明:黄土地区地表形态指数存在明显的空间分异规律,能够客观、准确地反映黄土地区地表形态状况,为公路建设、土地规划等研究提供依据.

In order to study the surface relief and broken degree of surface, the factors such as slope, altitude, land surface roughness and surface incision are selected to quantify the surface morphology index comprehensively. Based on the Digital Elevation Model and related database, the calculation and extraction of single elements are finished by using GIS. The formula of surface morphology index is elaborated to finish the calculation in the loess area, and the map of surface morphology index is obtained. The calculation results indicate that a highly spatial heterogeneity exists in the loess area and it objectively shows the surface morphology condition, which provide the a basis for highway construction and land division.