项目名称: 基于DEM的流域信息树研究——以黄土高原小流域为例
项目编号: No.41201408
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 地理学
项目作者: 陈永刚
作者单位: 浙江农林大学
项目金额: 25万元
中文摘要: 流域信息树是指在流域地貌体系中,以流域为基本研究对象,由一系列对流域形态、特征和发育具有标定指示作用的多元指标构建而成的信息结点的多层次、多尺度、立体式树型组合。流域信息树空间形态与结构在流域不同发育阶段的规律变化,在较高层次上体现、抽象了流域地貌独特的发育过程,映射了流域地貌的形成机理。流域信息树的定量和定性指标在不同黄土地貌区的相似性与差异性,又从一个重要侧面揭示着黄土高原流域地貌形态的空间分异规律。本项目首先提出流域信息树的基本定义,并分析其形态特征、层次级别、存在条件及类型;研究以多尺度DEM为基本信息源,建立与描述黄土高原地区流域信息树的方法;在此基础上,通过黄土高原多样区和多期模拟小流域的实验,研究黄土高原不同地貌类型区流域信息树的空间分异规律和发育演化过程,试图揭示黄土高原流域地貌的形态与组合的时空演化格局。该研究是基于流域信息树方法研究黄土高原流域地貌特征的一次创新探索。
中文关键词: 数字高程模型;流域信息树;数字地形分析;GIS空间分析;黄土高原
英文摘要: Watershed information tree is a multi-scale and tree-like hierarchical structure dataset which contains the complex morphologies,characteristics, and evolvement of the watershed in loess plateau. The research explores the fundamental theories and methods of watershed information tree from a new perspective. Based on multi-dimension angles, such as construction and serialization of watershed information tree, data mining in the semi-structured data and in the structure of information tree, quantification description, graphical representation and principle analysis, the study gives a new insight into the hierarchical structure features and spatial differentiation rules of loess plateau. It realizes enrichment of theories and methods for digital terrain analysis as well as further application of watershed information tree and bioinformatics analysis method, which is one of the innovative research findings on loess landform.The distinguishing feature of the research lies in the fact that it investigates watershed characteristics of loess plateau with a new approach- - - - the adoption of watershed information tree analytical method. The innovations of the research are listed as follows.Firstly,the main cause of loess plateau- - water erosion- - is fully taken into account in the study. It based on the basic watershe
英文关键词: Digital Elevation Model;Watershed Information Tree;Digital Terrain Analysis;Spatial Analysis;Loess Plateau