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针对丘陵地区与山地地区特征地形因子定量化界分

发表时间:2021-03-31  浏览量:371  下载量:44
全部作者: 范睿思,许乙青,邹宇
作者单位: 湖南大学建筑学院
摘 要: 国内丘陵地区和山地地区的定义以及界分大多表述于文字,缺乏可操作性强、准确度高的量化方法,从而导致对丘陵与山地及其资源要素、生态环境和发展问题认识的不全面。同时,采用量化的方法准确界分丘陵地区和山地地区,是实施数字山地战略以及国土空间规划全覆盖的一项基础性工作。在前人研究的基础上,本文采用地理信息系统(geographic information system,GIS)技术并结合数字高程模型(digital elevation model,DEM)数据,分别从研究区选取的丘陵地区和山地地区研究样本中提取六类地形因子,包括地形起伏度、地表切割深度、地面粗糙度、地形高程变异系数、沟谷线与山脊线密度,进行逐个量化分析和数据对比。研究表明:在丘陵地区和山地地区分别提取的地形起伏度、地表切割深度、地面粗糙度、地形高程变异系数、山脊线密度5种因子皆有着较明显的特征差异,存在界分临界值,可以作为界分丘陵与山地的界分因子;而提取的沟谷线密度则无明显的特征差异,无法确定界分临界值,因此不能作为界分丘陵与山地的因子。临界特征因子的确定,不仅可以为下一步临界值的确定提供科学依据,也可以为丘陵与山地的数字化表达提供参考。
关 键 词: 土木建筑工程设计;山地地区;丘陵地区;地形对比;GIS;差异分析
Title: Quantitative demarcation of terrain factors in hilly and mountainous areas
Author: FAN Ruisi, XU Yiqing, ZOU Yu
Organization: School of Architecture, Hunan University
Abstract: Most of the definitions and boundaries of hilly and mountainous areas in China are expressed in words, and there is a lack of quantification methods with strong operability and high accuracy, which leads to incomplete understanding of hilly and mountainous areas and their resource elements, ecological environment and development issues. At the same time, it is a basic work for the implementation of digital mountain strategy and the full coverage of territorial spatial planning to accurately demarcate hilly and mountainous areas by quantitative method. On the basis of predecessors’ research, the geographic information system (GIS) technology and digital elevation model (DEM) data are used to extracte six kinds of terrain factors, including the relief amplitude, the Earth’s surface incision and the ground surface roughness, variance coefficient in elevation, densities of valley line am ridge line, from the study samples of hilly area and mountainous areas in the study area. The quantitative analysis and data comparison of the factors are performed. The results show that the five factors extracted from hilly and mountainous areas, including relief amplitude, the Earth’s surface incision, surface roughness, variance coefficient in elevation and ridge line density, have obvious characteristic differences, and there are boundary critical value, which can be used as the boundary factors between hilly area and mountainous area. However, the extracted valley line density has no obvious characteristic difference and cannot determine the boundary critical value, so it cannot be used as a factor demarcating hills and mountains. The determination of the critical characteristic factor can not only provide scientific basis for the determination of the next critical value, but also provide reference for the digital expression of hills and mountains.
Key words: civil and architectural engineering design; mountainous region; hilly region; terrain contrast; GIS; variance analysis
发表期数: 2021年3月第1期
引用格式: 范睿思,许乙青,邹宇. 针对丘陵地区与山地地区特征地形因子定量化界分[J]. 中国科技论文在线精品论文,2021,14(1):61-73.
 
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