[1]郭富赟,孟兴民,黎志恒,等.天水市“7·25”群发性地质灾害特征及成因[J].山地学报,2015,(01):100.
　GUO Fuyun,MENG Xinmin,LI Zhiheng,et al.Characteristics and Causes of Assembled Geohazards Induced by the Rainstorm on 25th July 2013 in Tianshui City，Gansu，China[J].Mountain Research,2015,(01):100.
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天水市“7·25”群发性地质灾害特征及成因()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2015年01期
页码:
100
栏目:
山地灾害
出版日期:
2015-02-01

文章信息/Info

Title:
Characteristics and Causes of Assembled Geohazards Induced by the Rainstorm on 25th July 2013 in Tianshui City，Gansu，China
作者:
郭富赟;孟兴民;黎志恒;谢正团;陈冠;何云峰;
兰州大学西部环境教育部重点实验室;甘肃省地质环境监测院;
Author(s):
GUO Fuyun; MENG Xinmin; LI Zhiheng; XIE Zhengtuan; Chenguan; He Yunfeng
1. Key Laboratory of Western China's Environmental Systems with the Ministry of Education，Lanzhou University，Lanzhou 73000，China; 2. Institute of Geoenvironmental Monitoring of Gansu Province，Lanzhou 730050，China
关键词:
天水市; 暴雨; 群发性地质灾害; 链式; 促发因素
Keywords:
rainstorm; assembled geohazards; characteristics and formation mechanism; Tianshui of Gansu
分类号:
P642,P694
文献标志码:
A
摘要:
2013-07-25天水市遭遇罕见暴雨,引发群发性地质灾害(简称"7·25"群发性地质灾害),造成严重损失。基于实际调查数据,论述了本次地质灾害的类型、分布和成灾特征,并对成因进了分析。降水引发地质灾害708处,其中滑坡415处,崩塌102处,不稳定斜坡86处,泥石流100处,地裂缝3处,地面塌陷2处。地质灾害分布,在空间上具有不均性、流域集中性、群发性等特征,并受降雨范围控制;成灾特点表现为崩塌-滑坡-泥石流、滑坡-堰塞湖链式特征。研究表明,自2013-06-20以来,降水日数为24~26 d,降水日数较往年同期偏多10~15 d;同时,7月以来降水量是常年同期的2.2~3.4倍;7月25日...
Abstract:
In July 25th，2013，the Tianshui city has encountered a heavy rainstorm，which rainstrom triggered cluster geohazards，and caused serious casualties and economic losses. Based on field survey，the type，distribution，characterisic and formation of the geohazards were analyzed. The rainstorm induced 708 potential geohazards，including 415 landslides，102 collapse，86 unstable slopes，100 debris flow，three ground fissures，and two surface subsidence. The spatial distribution of geohazards，controlled by the rainfall，showed uneven，watershedconcentrated and clustering characteristics. The disaster exhibited chain characteristic，for example，collapselandslidedebris flow and landslide—barrier lake ，Results show that there were 24~26 days with rainfall since 20th June，which was more than 10~15 days higher compared with the same period in last year. Meanwhile，the rainfall was over 2.2~34 times heavier than the perennial rainfall at the same period since July. The maximum amount of 16 hours precipitation observed on 25th July was 152.2 mm. The rainfall exhibited characteristics of abundant antecedent rainfall and highintensity current rainfall，which were considered as the main triggering factors of this clusters of geohazards. Apart from that，the seismic intensity of “5·12” Wenchuan earthquake in the study area was around 6~8 degree，and 8 degrees in particular in the southern area causing the mountain loose，rock crushing，and therefore，in combination with the rainfall，it is inclined to trigger large amounts of landslides，in addition，the sliding prone rocksoil with its structure composition，and highrelief topography could lay the material foundation for this clusters geohazards.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2014-03-10；改回日期(Accepted)：2014-09-24。
基金项目(Foundation item)：国家重点基础研究发展计划项目，编号：2014CB744703；科技部支撑计划项目，编号：2011BAK12B06；甘肃省科技重大专项项目，编号：1102FKDA007。[Supported by National Major State Basic Research Development Program (973 Program, NO.2014CB744703)，National Key Technology R&D Program, China (No. 2011BAK12B06) and Science And Technology Key Project of Gansu province, China (No. 1102FKDA007).]
作者简介（Biography）：郭富赟(1970-)，男，甘肃景泰人，高级工程师/博士研究生，从事地质灾害防灾减灾方面的研究工作。[Guo Fuyun, (1970-),male, born in Jingtai of Gansu province, Senior Engineer/PhD and mainly engaged in prevention of geohazards.] E-mail:fyg51913@163.com
更新日期/Last Update: 1900-01-01