| 广东滑坡灾害的地质环境与致灾因素分析 |
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| 引用本文： | 刘瑞华,孙宁,唐光良.广东滑坡灾害的地质环境与致灾因素分析[J].热带地理,2010,30(1). |
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| 作者姓名： | 刘瑞华 孙宁 唐光良 |
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| 作者单位： | 1. 广州地理研究所,广州,510070
2. 深圳市房地产估价中心,广东,深圳,518034 |
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| 基金项目： | 广东省科技计划项目“广东省地质灾害预警预报关键技术”(2005B32601002) |
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| 摘 要： | 对各类风化壳进行综合调查,根据碎屑岩、块状岩、变质岩的风化壳发育特征,结合地层岩性和地质构造的特点,概述了广东地区的地质环境条件。从地层岩性和岩土结构、地质构造、地貌特征、地下水、矿物成分与滑坡的关系,叙述了滑坡的形成机制。认为暴雨和人类活动是滑坡的主要影响因素。提出了24h降雨量达到100~250mm,降雨强度50~70mm/h为引发滑坡的降雨量临界值,大于该临界值的雨量和雨强引发滑坡的概率较高,小于该临界值时引发滑坡的概率较低。该临界值可在全省不同的降雨区域针对不同的地质环境进行滑坡灾害监测和预警时作参考。
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| 关 键 词： | 广东 滑坡灾害 地质环境 致灾因素 |
Analysis of Geological Environment and Causes of Landslides in Guangdong |
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| LIU Ruihua,SUN Ning,TANG Guangliang.Analysis of Geological Environment and Causes of Landslides in Guangdong[J].Tropical Geography,2010,30(1). |
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| Authors: | LIU Ruihua SUN Ning TANG Guangliang |
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| Institution: | 1.Guangzhou Institute of Geography;Guangzhou 510070;China;2.Research Department of Geological Environment;Shenzhen Real Estate Assessment Center;Shenzhen 518034;China |
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| Abstract: | Through a comprehensive investigation of different types of weathered crust, this paper reports the spatial distribution of different types of weathered crust and analyzes the grading ingredient and the mineral ingredient of weathered soil. The rainfall features in the pertinent region are also used to analyze the forming process of a landslide caused by water penetration. This paper summarizes the geological environmental conditions in Guangdong, including lithological characteristics, tectonic features, a... |
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| Keywords: | Guangdong landslide disaster geological environment disaster-causing factors |
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