The mudflow disaster at Villa Santa Lucia in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys
文献类型：期刊论文
| 作者 | Somos-Valenzuela, Marcelo A.3,5; Oyarzun-Ulloa, Joaquin E.2; Fustos-Toribio, Ivo J.2; Garrido-Urzua, Natalia1; Chen, Ningsheng4
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| 刊名 | NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
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| 出版日期 | 2020-08-26 |
| 卷号 | 20期号:8页码:2319-2333 |
| ISSN号 | 1561-8633 |
| DOI | 10.5194/nhess-20-2319-2020 |
| 产权排序 | 5 |
| 通讯作者 | Fustos-Toribio, Ivo J.(ivo.fustos@ufrontera.cl) |
| 文献子类 | Article |
| 英文摘要 | The evaluation of potential landslides in mountain areas is a very complex process. Currently, event understanding is scarce due to information limitations. Identifying the whole chain of events is not a straightforward task, and the impacts of mass-wasting processes depend on the conditions downstream of the origin. In this paper, we present an example that illustrates the complexities in the evaluation of the chain of events that may lead to a natural disaster. On 16 December 2017, a landslide occurred in the Yelcho mountain range (southern Chile). In that event, 7 million m(3) of rocks and soil fell on the Yelcho glacier, depositing 2 million m(3) on the glacier terminal, and the rest continued downstream, triggering a mudflow that hit Villa Santa Lucia in Chilean Patagonia and killing 22 people. The complex event was anticipated in the region by the National Geological and Mining Survey (Sernageomin in Spanish). However, the effects of the terrain characteristics along the run-out area were more significant than anticipated. In this work, we evaluate the conditions that enabled the mudflow that hit Villa Santa Lucia. We used the information generated by Sernageomin's professionals after the mudflow. We carried out geotechnical tests to characterize the soil. We simulated the mudflow using two hydrodynamic programs (r.avaflow and Flo-2D) that can handle the rheology of the water-soil mixture. Our results indicate that the soil is classified as volcanic pumices. This type of soil can be susceptible to the collapse of the structure when subjected to shearing (molding), flowing as a viscous liquid. From the numerical modeling, we concluded that r.avaflow performs better than Flo-2D. The mudflow was satisfactorily simulated using a water content in the mixture ranging from 30 % to 40 %, which would have required a source of about 3 million m(3) of water. Coupling the simulations and the soil tests that we performed, we estimated that in the area scoured by the mudflow, there were probably around 2 800 000 m(3) of water within the soil. Therefore, the conditions of the valley were crucial to enhancing the impacts of the landslide. This result is relevant because it highlights the importance of evaluating the complete chain of events to map hazards. We suggest that in future hazard mapping, geotechnical studies in combination with hydrodynamic simulation should be included, in particular when human lives are at risk. |
| 电子版国际标准刊号 | 1684-9981 |
| 资助项目 | Chilean National Agency of Research and Development (ANID in Spanish) through the Program of International Cooperation (PCI in Spanish)[PII-180008] ; Fondecyt Iniciacion program[11170609] |
| WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000566348100001 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 资助机构 | Chilean National Agency of Research and Development (ANID in Spanish) through the Program of International Cooperation (PCI in Spanish) ; Fondecyt Iniciacion program |
| 源URL | [http://ir.imde.ac.cn/handle/131551/35590]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Fustos-Toribio, Ivo J. |
| 作者单位 | 1.Serv Nacl Geol & Min, Av La Paz 406, Puerto Varas 5550000, Region De Los L, Chile; 2.Univ La Frontera, Dept Civil Engn, Av Francisco Salazar 01145, Temuco 4780000, Chile; 3.Univ La Frontera, Butamallin Res Ctr Global Change, Av Francisco Salazar 01145, Temuco 4780000, Chile; 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 5.Univ La Frontera, Fac Agr & Forest Sci, Dept Forest Sci, Av Francisco Salazar 01145, Temuco 4780000, Chile; |
| 推荐引用方式 GB/T 7714 | Somos-Valenzuela, Marcelo A.,Oyarzun-Ulloa, Joaquin E.,Fustos-Toribio, Ivo J.,et al. The mudflow disaster at Villa Santa Lucia in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys[J]. NATURAL HAZARDS AND EARTH SYSTEM SCIENCES,2020,20(8):2319-2333. |
| APA | Somos-Valenzuela, Marcelo A.,Oyarzun-Ulloa, Joaquin E.,Fustos-Toribio, Ivo J.,Garrido-Urzua, Natalia,&Chen, Ningsheng.(2020).The mudflow disaster at Villa Santa Lucia in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys.NATURAL HAZARDS AND EARTH SYSTEM SCIENCES,20(8),2319-2333. |
| MLA | Somos-Valenzuela, Marcelo A.,et al."The mudflow disaster at Villa Santa Lucia in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys".NATURAL HAZARDS AND EARTH SYSTEM SCIENCES 20.8(2020):2319-2333. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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