Analysis of the cause of the“6·26” large debris flow in Yihai Town, Mianning County, Liangshan Prefecture, Sichuan Province
-
摘要:
2020年6月26日晚21时左右，彝海镇大马乌村和大堡子村爆发大型山洪泥石流，此次泥石流灾害造成重大人员伤亡及财产损失。灾后通过收集当地基础资料，结合现场调访及野外勘察等手段分析泥石流成因：此次泥石流是由于前期地震及人类工程活动影响下，导致该流域松散固体物质丰富且未及时疏通治理；流域中上游坡体坡度较大，地势陡峭，为泥石流发育提供了良好的自然条件，6月26日晚上突降特大暴雨，超出降雨阈值，造成安宁河洪水泛滥，冲毁堤坝，引发特大泥石流。此次泥石流灾害给我们以重大警示：应加强泥石流防灾减灾知识宣传，指导当地居民选择合理场地进行工程活动并及时疏通河道，加强山地灾害监测预警，完善群测群防体系建设。
Abstract:At around 21 pm on June 26, 2020, a massive debris flow broke out in Damawu Village and Dabaozi Village, Yihai Town. This massive debris flow caused heavy casualties and property losses. After the disaster, the causes of debris flow were analyzed by collecting local basic information, combining it with field investigation and field testing. The debris flow was caused by the early earthquake and human activities, which led to abundant loose solid materials in the basin, and the loose solid materials were not dredged and treated in time. The slope of the upper and middle reaches of the basin is large and the terrain is steep, which provides good natural conditions for the development of debris flow. On the evening of June 26, heavy rain suddenly fell, which surpassed the rainfall threshold and caused the flood of the Anning River to wash away the dam and triggered the massive debris flow. The debris flow disaster gives us a major warning: we should strengthen the publicity of debris flow disaster prevention and mitigation knowledge, guide local residents to choose reasonable sites to carry out engineering activities and dredge the river course in time, strengthen the monitoring and early warning of mountain disasters, and improve the construction of group detection and prevention systems.
-
-
[1] 李小龙,宋国虎,向灵芝,等. 基于不同评价单元和灾害熵的泥石流危险性分析—以白龙江流域武都段为例[J]. 中国地质灾害与防治学报,2021,32(6):107 − 115. [LI Xiaolong,SONG Guohu,XIANG Lingzhi,et al. Hazard analysis of debris flows based on different evaluation units and disaster entropy:A case study in Wudu section of the Bailong River Basin[J]. The Chinese Journal of Geological Hazard and Control,2021,32(6):107 − 115. (in Chinese with English abstract)
[2] 王凤娘,贺拿,陈容,等. 九寨沟县西番沟泥石流调查[J]. 山地学报,2019,37(4):622 − 630. [WANG Fengniang,HENA,CHEN Rong,et al. Investigation of debris flow in Xifangou,Jiuzhaigou County,China[J]. Mountain Research,2019,37(4):622 − 630. (in Chinese with English abstract)
[3] 魏正发,曹小岩,张俊才,等. 青海省滑坡崩塌泥石流灾害时空分布特征[J]. 中国地质灾害与防治学报,2021,32(6):134 − 142. [WEI Zhengfa,CAO Xiaoyan,ZHANG Juncai,et al. Temporal and spatial characteristics of landslide,rockfall and debris flow disasters in Qinghai Province during the period[J]. The Chinese Journal of Geological Hazard and Control,2021,32(6):134 − 142. (in Chinese with English abstract)
[4] 陈丽荣. 突发性泥石流对旅游景区生态破坏程度评估方法[J]. 灾害学,2020,35(2):30 − 33. [CHEN Lirong. Assessment method of eco-damage degree of sudden debris flow to tourist scenic spots[J]. Journal of Catastrophology,2020,35(2):30 − 33. (in Chinese with English abstract) doi: 10.3969/j.issn.1000-811X.2020.02.007
[5] 李桂, 黄哲程. 四川冕宁暴雨灾害已致16人遇难6人失联[N]. 新京报, 2020-07-03（8）
LI Gui, HUANG Zecheng. Sixteen people have been killed and six are missing in Mianning, Sichuan province[N]. The Beijing news, 2020-07-03（8）. （in Chinese）
[6] 沈正芳. 冕宁年鉴（2020）[Z]. 冕宁: 冕宁县人民政府, 2020
SHEN Zhengfang. The yearbook in Mianning（2020）[Z]. Mianning: Mianning Country People’s Government, 2020. （in Chinese）
[7] 廖珩云. 昔格达组粘土岩蠕变特性试验研究及其边坡蠕变变形分析——以四川江铜稀土工业园区边坡为例[D]. 成都: 成都理工大学, 2016
LIAO Hengyun. Experimental study on creep characteristics of xigeda’clay rock and its slope creep analysis: A case analysis of A slope in industrial park of Sichuan Jiang Tong[D]. Chengdu: Chengdu University of Technology, 2016. （in Chinese with English abstract）
[8] 许英杰. 四川冕宁县滑坡地质灾害发育特征及风险性评价研究[D]. 成都: 成都理工大学, 2017
XU Yingjie. Study on development characteristics and risk assessment of landslide hazards in Mianning County Sichuan Province[D]. Chengdu: Chengdu University of Technology, 2017. （in Chinese with English abstract）
[9] 张绍科,胡卸文,王严,等. 四川省冕宁县华岩子沟火后泥石流成灾机理[J]. 中国地质灾害与防治学报,2021,32(5):79 − 85. [ZHANG Shaoke,HU Xiewen,WANG Yan,et al. Disaster mechanism of post-fire debris flow in Huayanzi gully,Mianning County,Sichuan Province[J]. The Chinese Journal of Geological Hazard and Control,2021,32(5):79 − 85. (in Chinese with English abstract)
[10] 赵鑫,张海太,赵志芳,等. 滇西北海巴洛沟“7·28”降雨-冰川融水混合型泥石流成因研究[J]. 工程地质学报,2020,28(6):1339 − 1349. [ZHAO Xin,ZHANG Haitai,ZHAO Zhifang,et al. Study on the genesis of rainfall-glacier mixed type debris flow of haibalo gully in northwest Yunnan on July 28,2019[J]. Journal of Engineering Geology,2020,28(6):1339 − 1349. (in Chinese with English abstract)
[11] 陈宁生. 泥石流勘查技术[M]. 北京: 科学出版社, 2011
CHEN Ningsheng. Investigation technolog for debris flows[M]. Beijing: Science Press, 2011. （in Chinese）
[12] 泥石流灾害防治工程勘察规范（试行）: T/CAGHP 006—2018[S]. 北京: 中国地质灾害防治工程行业协会, 2018
Specification of Geological Investigation for Debris Flow Stabilization: T/CAGHP 006—2018[S]. Beijing: China Association of Geological Hazard Prevention, 2018. （in Chinese with English abstract）
[13] 龚兴隆,陈昆廷,陈晓清,等. 则查洼沟“8·4”泥石流灾害成因分析[J]. 中国水土保持科学,2020,18(5):96 − 103. [GONG Xinglong,CHEN Kunting,CHEN Xiaoqing,et al. On the causes of “8·4” debris flow disaster at Zechawa Gully[J]. Science of Soil and Water Conservation,2020,18(5):96 − 103. (in Chinese with English abstract)
[14] 周必凡, 李德基, 罗德富, 等. 泥石流防治指南[M]. 北京: 科学出版社, 1991: 80
ZHOU Bifan, LI Deji, LUO Defu, et al. Guide for Debris Flow Prevention [M]. Beijing: Science Press, 1991: 80. （in Chinese）
[15] 陈志,杨志全,刘传秋. 云南省麻栗坡县猛硐河“9.02”泥石流调查[J]. 山地学报,2019,37(4):631 − 638. [CHEN Zhi,YANG Zhiquan,LIU Chuanqiu. Investigation of the “9.02” debris flows in Mengdong River,Malipo County,Yunnan,China[J]. Mountain Research,2019,37(4):631 − 638. (in Chinese with English abstract)
[16] 曹晨,余斌,马二龙,等. 四川汶川县佛堂坝沟“7·10”泥石流调查研究[J]. 泥沙研究,2019,44(1):38 − 43. [CAO Chen,YU Bin,MA Erlong,et al. Study on debris flow in Fongtuba Gully after the earthquake at Wenchuan County of Sichuan Province[J]. Journal of Sediment Research,2019,44(1):38 − 43. (in Chinese with English abstract) doi: 10.16239/j.cnki.0468-155x.2019.01.006
[17] 余斌,王涛,朱渊. 浅层滑坡诱发沟谷泥石流的地形和降雨条件[J]. 水科学进展,2016,27(4):542 − 550. [YU Bin,WANG Tao,ZHU Yuan. Research on the topographical and rainfall factors of debris flows caused by shallow landslides[J]. Advances in Water Science,2016,27(4):542 − 550. (in Chinese with English abstract)
[18] 陈宁生,黄蓉,李欢,等. 汶川5·12地震次生泥石流沟应急判识方法与指标[J]. 山地学报,2009,27(1):108 − 114. [CHEN Ningsheng,HUANG Rong,LI Huan,et al. Emergency judge method and index of debris-flow sites triggered by 5·12 Wenchuan earthquake[J]. Journal of Mountain Science,2009,27(1):108 − 114. (in Chinese with English abstract) doi: 10.3969/j.issn.1008-2786.2009.01.016
[19] 陈文强. 关于岩土工程地质灾害的成因与防治研究[J]. 世界有色金属,2020(13):179 − 180. [CHEN Wenqiang. Study on the causes and prevention of geotechnical engineering geological disasters[J]. World Nonferrous Metals,2020(13):179 − 180. (in Chinese with English abstract) doi: 10.3969/j.issn.1002-5065.2020.13.086
-
下载:
图(10)
计量
- 文章访问数: 836
- PDF下载数: 36
- 施引文献: 0