爆燃地形的特征表达与提取方法  

Feature expression and extraction method of deflagration terrain

作　　者：周访滨[1,2] 王俊 谢财昌 朱衍哲 马国伟 ZHOU Fangbin;WANG Jun;XIE Caichang;ZHU Yanzhe;MA Guowei(School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Key Laboratory of Special Environment Road Engineering of Hunan Province,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]长沙理工大学特殊环境道路工程湖南省重点实验室,湖南长沙410114

出　　处：《长沙理工大学学报（自然科学版）》2022年第2期70-76,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(41671446);湖南省自然科学基金资助项目(2021JJ30702);长沙理工大学特殊环境道路工程湖南省重点实验室开放基金资助项目(kf140502)。

摘　　要：【目的】解决当前爆燃地形提取方法中缺乏用定量化指标表达的问题。【方法】基于数字地形分析技术在地形特征表达中的优势,提出以地形位置指数、坡度和平面曲率为量化指标的关键爆燃地形的特征表达方案,建立栅格数字高程模型(digital elevation model,DEM)爆燃地形的提取方法与流程,并选取凉山火灾区域为试验区进行爆燃地形提取试验。【结果】该方法有效提取了凉山火灾区域峡谷、山脊、陡坡和草塘沟4类爆燃地形,其面积为25.78km^(2)。考虑到栅格DEM分辨率对提取结果的影响,分别取5、15和30m分辨率数据进行试验,其对应的爆燃地形面积分别为25.17、25.51和25.78km^(2)。【结论】不同分辨率栅格DEM的爆燃地形的提取结果之间存在差异。[Purposes]The paper aims to solve the problem of lack of quantitative index expression in current deflagration terrain extraction methods.[Methods]Based on the advantages of digital terrain analysis technology in the expression of terrain features,the key deflagration terrain feature expression scheme taking topographic position index,slope and surface curvature as quantitative indexes was proposed,the extraction method and process of deflagration terrain based on grid digital elevation model(DEM)were established,and Liangshan fire area was selected as the test area for deflagration terrain extraction experiment.[Findings]The method effectively extracted four types of deflagration terrain in Liangshan fire area,namely canyon,ridge,steep slope and ditch pond meadow,the deflagration terrain area is 25.78km^(2).Considering the effect of resolution of grid DEM on the extraction results,the data with resolutions of 5,15and 30m were taken for experiments,and the corresponding deflagration terrain areas were 25.17,25.51and 25.78km^(2),respectively.[Conclusions]There are differences in deflagration terrain extraction results of grid DEM with different resolutions.

关 键 词：数字地形分析 栅格DEM 地形提取 爆燃地形 地形因子 

分 类 号：P217[天文地球—测绘科学与技术]