基于GRID-TIN混合格网DEM的旱作梯田数值模拟模型研究  

Study on GRID-TIN Hybrid DEM-Based Numerical Simulation Model of Terraced Dryland

作　　者：赵卫东[1,2] 周弯[1] 汤国安[2] 马雷[1] 赵纪堂 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046

出　　处：《地理与地理信息科学》2015年第3期38-43,共6页Geography and Geo-Information Science

基　　金：国家自然科学重点基金资助项目(40872166);虚拟地理环境教育部重点实验室开放基金资助项目(2012VGE04);安徽省国土资源科技项目(2012AHST0802)

摘　　要：旱梯田地形具有独特的平面和剖面形态特征,现有DEM难以对其地貌形态特征进行准确描述,无法满足构建旱梯田地形数值模拟模型的需求。为此,以黄土高原典型旱梯田地形为切入点,基于Grid-TIN混合格网DEM和面向对象技术构建出水平梯田等典型旱梯田数值模拟模型。根据旱梯田地形的独特地貌形态特征,提出能够对旱梯田地形的高程、坡度进行准确计算的数字地形分析方法。该研究成果是对基于DEM的旱梯田地形数值模拟模型研究的有益尝试,对于探讨利用DEM实现旱梯田地形的有效数字表达与分析具有重要理论意义。Terraced drylands have unique planar and vertical morphological characteristics. But their morphological characteris- tics cannot be depicted accurately by existing Digital Elevation Model（DEM）,which makes it difficult for the existing DEM to meet the needs of constructing numerical simulation model of terraced drylands. Therefore, based on GRID-TIN hybrid DEM and object-oriented technology, this paper takes terraced drylands in the Loess Plateau as key point and builds numerical simula- tion models like level terraces. According to the unique morphological characteristics of terraced drylands, new accurate methods of calculating elevation and slope of terraced drylands are proposed. The results are significant attempts about the study of DEM-based numerical simulation models of terraced drylands and have important theoretical significance for the realization of effective digital representation and analysis of terraced drylands by use of DEM.

关 键 词：梯田 梯田模型 地形分析 数值模拟 

分 类 号：P208[天文地球—地图制图学与地理信息工程] S157.3[天文地球—测绘科学与技术]