摘要
云南省地质灾害类型主要为崩塌、滑坡、泥石流及地面塌陷。1:50000地质灾害详细调查发现地质灾害及隐患点34408处,其中滑坡24044处,崩塌4054处,泥石流4784处。在高原山区复杂而脆弱的地质环境条件下,局地暴雨、地震和河流侵蚀是地质灾害的主要自然诱发因素,但人类工程对地质灾害的影响越来越大,新增地质灾害隐患点常与人类工程活动相关联。经过多因素综合分析,进行了地质灾害易发性分区评价。受地质环境条件及内外动力地质作用和人类活动特征及规律的控制,地质灾害的形成规律主要为:沿特定的地形地貌呈带状发育、受散裂及易滑岩土体和构造控制形成高发区带、动态起伏与降雨同步、与地震烈度成正比的放射状衰减规律等。指出依据地质灾害发育规律,加强风险分级管控和隐患排查治理、规范人类工程活动是防灾减灾的有效途径。
The main types of geological disaster are collapse,landslide,debris flow and land collapse in Yunnan Province,China.According to the 1:50000 Scale detailed investigation of geological disaster,34408 geological disasters and hidden danger points had been identified,including 24044 landslides,4054 collapses and 4784 debris flows.In the complex and fragile geological environment conditions of mountainous plateau,local rainstorm,earthquake and stream erosion are the main natural inducing factors of geological disasters,however,the impact of human engineering activities on geological disasters is more and more serious,and the new hidden danger points of geological disasters are often associated with human engineering activities.Based on the comprehensive analysis of multiple factors,we carrie out the assessment of geological disaster prone area.Controlled by the geological environment conditions,internal and external dynamic geological processes,and the characteristics of human activities,the formation laws of geological disasters are mainly as follows:the banded development along the zone of specific topography and landform,the high susceptible belt area controlled by spalling and slippery rock and soil and the tectonics,the synchronization of dynamic fluctuation with rainfall,and the radial attenuation law proportional to earthquake intensity,etc.It is pointed out that according to the development law of geological disasters,strengthening risk hierarchical control and hidden danger investigation and treatment,and standardizing human engineering activities are effective ways of disaster prevention and reduction.
作者
杨迎冬
晏祥省
王宇
汤沛
魏蕾
赵鹏
黄成
YANG Yingdong;YAN Xiangsheng;WANG Yu;TANG Pei;WEI Lei;ZHAO Peng;HUANG Cheng(Yunnan Institute of Geoenvironment Monitoring,Kunming 650216,China;Yunnan Geological Survey,Kunming 650051,China)
出处
《灾害学》
CSCD
北大核心
2021年第3期131-139,共9页
Journal of Catastrophology
基金
云南省地质灾害综合防治体系建设(2013-2020)(云财资环〔2020〕68号)
云南省地质灾害气象风险预警业务能力建设(云财资环〔2020〕113号)
云南省科技厅—云南大学“双一流”建设联合基金项目“天空地协同的高山峡谷区重大地质灾害隐患识别监测预警研究”。
关键词
地质灾害
形成条件
发育规律
易发性
风险
高原山区
云南
geological disasters
conditions
development
susceptibility
risk
plateau area
Yunnan
