1. 广西壮族自治区地质环境监测总站,广西,桂林,541000
2. 广西大学 土木建筑工程学院,广西,南宁,530004
3. 工程防灾与结构安全教育部重点实验室,广西,南宁,530004
4. 广西防灾减灾与工程安全重点实验室,广西,南宁,530004
纸质出版:2017
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文海涛, 韦朝华, 廖丽萍, 等. 桂东南容县地质灾害发育与时空分布特征[J]. 水土保持通报, 2017,37(5):182-188.
WEN Haitao, WEI Chaohua, LIAO Liping, et al. Occurrence and Temporal-spatial Distribution Characteristics of Geological Hazards in Rongxian County in Southeast Guangxi Zhuang Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 182-188.
文海涛, 韦朝华, 廖丽萍, 等. 桂东南容县地质灾害发育与时空分布特征[J]. 水土保持通报, 2017,37(5):182-188. DOI: 10.13961/j.cnki.stbctb.20170919.001.
WEN Haitao, WEI Chaohua, LIAO Liping, et al. Occurrence and Temporal-spatial Distribution Characteristics of Geological Hazards in Rongxian County in Southeast Guangxi Zhuang Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 182-188. DOI: 10.13961/j.cnki.stbctb.20170919.001.
[目的] 掌握广西壮族自治区容县地质灾害的发育状况,为地质灾害的防治规划和监测预警提供科学依据。[方法] 基于10 a余的详查资料,运用统计分析方法,深入探讨地质灾害的发育与时空分布特征。[结果] 地质灾害有滑坡、崩塌、不稳定斜坡和泥石流4种类型,数量百分率分别为40.57%,26.87%,32.30%和0.26%,规模以小型为主。致灾体多为表层残坡积土,滑坡以牵引式为主,崩塌以滑移式与牵引式为主,不稳定斜坡有坡面局部崩塌型、坡面冲蚀型、高陡型。地质灾害受局地强降雨与台风降雨影响显著,在6-8月集中发生,稍滞后于降雨,具有夏汛突发的特点。地质灾害地域分布呈全县整体分散而部分乡镇高密度聚集的特点,主要发育于低山丘陵地貌区和块状坚硬花岗岩岩组区。沿地质构造带呈局部线状分布,但受地质构造的影响不大。[结论] 容县地质灾害发育与分布主要受岩土体类型、降雨与人类工程活动影响。
[Objective] The occurrence condition of geological hazards was analyzed in order to provide a scientific reference for the prevention and control of regional geological hazards in Rongxian County
Guangxi Zhuang Autonomous Region.[Methods] The occurrence and temporal-spatial distribution features were analyzed by adopting a statistical method based on the detailed data of field surveys over the past ten years.[Results] There were 4 types of geological hazard:landslide
collapse
unstable slope and debris flow. Their occurrence scales were small
and occurrence rates accounted for 40.57%
26.87%
32.30% and 0.26% of the total hazards respectively. The movement ways were tractive in the landslide
tractive and sliding in the collapse. The unstable slope manifested three types:partial collapse slope
partial erosive slope
and high steep slope. Geological hazards were significantly influenced by local heavy rainfall and typhoon rainfall
and concentrated in the period of June and August
having time lag effect and always happened suddenly in summer rainy season. The geological hazards distributed in the whole region but happened more frequently in some townships. Most of the hazards occurred in low hilly region and granite region
and presented a local linear distribution along the geological structural belt. However
the geological structure had no remarkable impact on these geological hazards.[Conclusion] The occurrence and distribution features are influenced by three aspects
including types of rock soil mass
rainfall and human engineering activity.
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