题名黄土高原地面坡谱及空间分异研究
作者李发源
学位类别博士
答辩日期2007
授予单位中国科学院水利部成都山地灾害与环境研究所
授予地点成都
导师汤国安
关键词黄土高原 坡谱 黄土地貌 空间分异 数字高程模型 数字地形分析
学位专业自然地理学
中文摘要坡谱(slope spectrum)是在一定指标递变规律或分类组合规律基础上形成的一条(幅)或一系列可定量描述地表坡面组合形态特征的谱线、图表或图形。在黄土高原的初步研究显示,不同的坡谱对应着不同的地貌形态、映射着该区域地貌的发育特征,坡谱的空间分异体现了黄土地貌形态与类型组合的空间分异。论文在充分吸收借鉴前人研究成果的基础上,在地理信息科学、地球系统科学、地貌学、空间统计学等相关学科理论支持下,综合运用微观与宏观分析相结合、定性与定量分析相结合的研究方法,以陕北黄土高原为主要研究区域,对坡谱的基础理论与方法体系进行了详细地研究。 论文首先在狭义的坡谱的概念的基础上,从方法论的角度对坡谱的概念做了新的界定,讨论了坡谱的功能、理论基础与坡谱的原创性等问题;然后建立了坡谱的分类体系,探讨了坡谱的属性、提取、影响因素与不确定性等坡谱的基础理论。 其次,以坡度谱为研究重点,从数量特征和空间结构特征两个方面入手,深入地研究了坡谱的量化表达方法及空间分异特征,阐明了坡谱的地学意义及其与黄土地貌形态类型的空间耦合关系。 最后,通过黄土地貌类型区的自动划分及基于坡谱的水土流失地形因子两个研究实例表明了坡谱在黄土高原自然地理研究中的应用前景。 论文通过对坡谱的“形”、“数”、“理”特征的研究,建立了一套基于坡谱进行数字地形分析的理论与方法体系,丰富了数字地形分析的研究内容,为黄土地貌时空演化序列的研究打下了基础。同时,坡谱分析法作为黄土高原地形地貌研究的新方法也显示了其良好的应用前景。它也是地学信息图谱理论应用于黄土高原研究的一次有益实践。
索取号TP3;K90
英文摘要Slope spectrum is one or a series of spectrum line, chart or figure, which is capable of depicting ground slope distribution. It is constructed according certain grading law or classification law of the slope index. Preliminary investigation shows that any landform could find its corresponding slope spectrum, which exists uniquely and is capable of reveling corresponding landform type, local complexity, and geomorphic development as well. Based on former research, and taken the Loess Plateau in north Shaanxi province as mainly study area, basic theory and methodology of the slope spectrum are investigated deeply and thoroughly in this paper. Integrated methodology both microcosmicly and macroscopicly, qualitatively and quantitatively is applied in this study.Firstly, based on the narrow concept of the slope spectrum, this paper gives a new definition of it on the point of view of methodology, and discusses the function, theory element and original of the slope spectrum. Then the classification system of the slope spectrum is established and the attribute, extraction methodology, affection factor, uncertainty of the slope spectrum are discussed.Secondly, taken slope gradient spectrum as research emphases, this study investigates the quantitative depiction and spatial distribution of the slope spectrum in detail, and clarifies the geo-significance of the slope spectrum, and spatial coupling between the slope spectrum and the loess landform type as well.Lastly, the application prospect of slope spectrum in the research of physical geography in the Loess Plateau is discussed through two case studies: automatically classification of the loess landform area and terrain factor of soil erosion based on slope spectrum.Following the research of the “distribution”, “modeling” and “mechanism” feature of the slope spectrum, theory and methodology of digital terrain analysis based on slope spectrum are established, which enriches the content of digital terrain analysis, and shows well application prospect in the geomorphological research of the Loess Plateau. Furthermore, it is a useful practice of the application of Geo-Info-TUPU in the research of the Loess Plateau.
语种中文
学科主题自然地理学
公开日期2010-10-20
内容类型学位论文
源URL[http://ir.imde.ac.cn/handle/131551/2247]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
推荐引用方式
GB/T 7714
李发源. 黄土高原地面坡谱及空间分异研究[D]. 成都. 中国科学院水利部成都山地灾害与环境研究所. 2007.
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