摘要
广西碎屑岩分布区从2005年至2013年间发生突发性地质灾害共1 261处,其中滑坡数量最多,共860处,占总数的68.2%,隐患点3 956处。通过分析滑坡稳定性的关键性影响因子,以坡度、土地利用类型、岩组、降雨等评价指标建立广西碎屑岩区滑坡易发区评价体系。基于ArcGIS以90 m×90 m栅格单元作为滑坡易发性评价的基本评价单元,采用信息量法计算坡度、土地利用类型、岩组、降雨等评价指标的信息值。对广西碎屑岩分布区进行滑坡易发性评价,分析得到广西碎屑岩区滑坡易发性区划和防治区划。以广西碎屑岩区作为研究区,分析结果可为广西碎屑岩区滑坡预警和防治规划提供技术参考。
A total of 1 261 unexpected geological disasters happened in the clastic rock zone of Guangxi province in the period of 2005 - 2013,about 860 of which was landslide,shared 68. 2% of the total,and the number of hidden peril was 3 956. Based on the analysis of control factors of landslide stability,several factors,such as the slope,the land usage,the rock group and the rainfall,were chosen to establish an assessment system for landslide prone areas in Guangxi clastic rock zone. Based on the Arc GIS,a 90 m × 90 m grid was chosen to be as the basic evaluation grid for landslide susceptibility assessment. The information method was used to calculate the information values of the slope,the land usage,the rock group and the rainfall. Through evaluation,the susceptibility of landslide in Guangxi clastic rock zone and the prevention measures of landslide were obtained. Taking the clastic rock zone of Guangxi province as an example,the research provides a technical support for landslide warning and landslide disaster prevention.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2016年第1期141-148,共8页
Journal of Guangxi University（Natural Science Edition）
基金
广西壮族自治区国土资源厅重大科研课题项目(GXZC2014-G3-0371-KLZB
GXZC2015-G3-4366-KLZB)
广西科学研究与技术开发计划(桂科攻1298005-6)
国家自然科学基金资助项目(51369006)
关键词
碎屑岩
滑坡
易发性评价
信息量法
ARCGIS
clastic rock
landslide
susceptibility evaluation
information method
ArcGIS
