摘要
五华县主要地质灾害类型有滑坡、崩塌、地面塌陷、水土流失等。其中以滑坡、崩塌为主,多分布在东南、南部花岗岩区、北部花岗岩风化土区等广大中低山及丘陵区,具有点多面广,灾害点个体规模小,稳定性差,活动频繁,地质灾害发育呈明显的地域性与季节性分布等特点。五华县地质灾害的形成与发生是多种致灾因素相互作用的结果。地层岩性是其形成的内在要素,它在一定程度上决定着地质灾害的发育程度与类型;地形地貌与植被是地质灾害形成的外在条件,它制约着崩、滑、塌等致灾地质作用的形成;大气降雨是地质灾害形成与发生的激发因素,决定着地质灾害发生的速度和时间;人类工程活动是影响地质灾害形成与发生的最主要、最直接的因素。对地质灾害的防治应采用避让、预防、监测及治理措施,做到避让与治理结合,以群测群防为基本手段,点状灾害以工程治理与生物防治为主;面状灾害以生物防治为主;采用点、面结合综合治理的方法。
Based on the basic status, many geological hazards in Wuhua County are analyzed, such as the landslide, collapse, ground subsidence, debris flow and the Soil and Water Loss, which are mostly distributed in the granite area in the south-east and south and the granite-weathering area in the north of Wuhua County. The geological haza^ls are severely harmful and distributed widely and densely, with the characteristic of small scale, frequent activity and low stability. This paper points out that the genesis of the geological hazards in Wuhua County is related to result of the interaction of multiple factors. The strata and lithology are the basic internal factors with responsibility for the geological hazards. The landform and physiognomy are the outer condition, and rainfall is the stimulative factor which responsible for the rate and time of the genesis of hazards. Therefore the human activities and engineerings are the most important and direct factors. Furthermore, the basic strategies and the countermeasures of the geological hazards were put forward in this paper that we should adopt the avoiding, prevention, supervising and harness strategies, and so on. Meanwhile the measure of civil survey and prevention should be strengthened for the geological hazards in Wuhua County.
出处
《中国地质灾害与防治学报》
CSCD
2008年第3期96-101,共6页
The Chinese Journal of Geological Hazard and Control
基金
广东省科技项目(A类306701)
关键词
地质灾害
滑坡
崩塌
防治对策
广东省五华县
Wuhua county
Guangdong
Province
geological hazard
landslide
collapse
countermeasure
