J4 ›› 2011, Vol. 41 ›› Issue (2): 523-528.

• 地质工程与环境工程 • 上一篇    下一篇

地质灾害易发性评价单元划分方法——以陕西省黄陵县为例

霍艾迪1,张骏2,卢玉东1,成玉祥1,姚以亮1   

  1. 1.长安大学 环境科学与工程学院,西安710054;
    2.长安大学 地质工程与测绘学院,西安710054
  • 收稿日期:2010-06-16 出版日期:2011-03-26 发布日期:2011-03-26
  • 通讯作者: 张骏(1955-),男,陕西蓝田人,教授,主要从事地质灾害研究 E-mail:zjun@chd.edu.cn
  • 作者简介:霍艾迪(1971-)|男|陕西西安人|讲师|博士|主要从事遥感与GIS应用的研究|E-mail:huoaidi@chd.edu.cn
  • 基金资助:

    中国地质调查局项目(1212010640403)

Method of Classification for Susceptibility Evaluation Unit for Geological Hazards: A Case Study of Huangling County, Shaanxi, China

HUO Ai-di1, ZHANG Jun2, LU Yu-dong1,CHENG Yu-xiang1, YAO Yi-liang1   

  1. 1.College of Environmental Science &|Engineering, Chang’an University, Xi’an710054,China;
    2.College of Geology Engineering and Geomoatics, Chang’an University, Xi’an710054,China
  • Received:2010-06-16 Online:2011-03-26 Published:2011-03-26

摘要:

为了提高区域地质灾害易发性评价精度,采用斜坡单元作为研究对象,以GIS技术作为平台,利用水文解析工具,提出了一种将大面积研究区自动划分为最小适宜评价单元的新方法。使用此方法将陕西省黄陵县划分为6 258个最小适宜评价单元后,再通过一个地质灾害易发程度贡献分值模型计算每个评价单元易发度的分布,并以此进行黄陵县地质灾害易发程度分区评价。评价结果为:据易发度分值将黄陵县分为5个地质灾害易发区,其中高易发区占全县面积的9.94%,主要分布于洛河、沮河及寇家河河谷区,是今后地质灾害防治的重点区域。

关键词: 易发性评价, 格网大小, 地理信息系统, 评价单元

Abstract:

To improve the accuracy of the evaluation of the regional geological hazard in a large scale,this paper focuses on the question that what kind of spatial resolution can be used to raster-based data on these quantify factors that is more appropriate to the accurate evaluation process, and analyzes the factors which affect choosing spatial resolution. With slope unit as an object of study, it develops a suitable new method for accurate evaluation which a study area can be automatically divided in to units using geographical information system (GIS) and hydrological analysis tools. Large parts of the study area, which is in Huangling county, Shaanxi Province, are classified into 6 258 evaluation modules, with a model of geological hazard accuracy contribution scoring to measure the distribution of degreeprone for each evaluation unit. The effectiveness of the proposed method has been tested in a practical application to a geo-hazard susceptibility evaluation in Huangling County of Yan’an City. Evaluating results show that Huangling county is divided into five level according to different geological hazard accuracy region. High accuracy areas account for 9.94% and are mainly situated in vaueies of Luohe River, Juhe River and Koujia River, which are the important areas for prevention and treatment of geological disaster in the future.

Key words: susceptibility evaluation, grid size, geographic information systems, evaluation unit

中图分类号: 

  • P208
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