摘要
河网结构信息的提取需要相应的流域提取工具和方法,因此构建完备的流域提取模型提高流域信息的提取速度,并将提取出的河网结构信息应用于流域形态和发育演化方面的研究,具有重要的理论意义。本研究中,首先利用ArcGIS软件平台构建流域提取模型,整合流域提取步骤和增加流域信息的提取效率;其次,结合流域结构的描述指标平均分支比和分维数对流域结构进行定量化表达;最终分析不同流域的空间分布状态,流域平均分支和分维数之间呈现反比例变化规律,随着流域的分维数越大,流域结构形态越稳定。
The extraction of river network structure information need corresponding watershed extraction tools and methods, and to build the model to improve the extraction speed of watershed extraction of watershed informa-tion, and the extracted river network information used in the study watershed development and morphological evo-lution, has important theoretical significance. In this study, we use ArcGIS software platform to build integrated wa-tershed watershed extraction model, extraction step and increase the extraction efficiency of watershed information;secondly, combined with the description of basin structure and the average branching ratio index and fractal dimen-sion to quantify the basin structure expression; the final analysis distribution in space, showing a regular variation between the average proportion Branch watershed and fractal dimension, the fractal dimension of river basin is big-ger, more stable basin structure.
作者
张振鹏
米鸿燕
ZHANG Zhen-peng;MI Hong-yan(School of Land Resources Engineering,Kunming University of Science and Technolog;Kunming 650093,China)
出处
《软件》
2018年第8期117-121,共5页
Software
关键词
流域
河网结构
提取模型
分支比
分维数
Watershed
River network structure
Extraction model
Branching ratio
Fractal number
