The mudflow disaster at Villa Santa Lucía in Chilean Patagonia:  understandings and insights derived from numerical  simulation and postevent field surveys

Somos-Valenzuela, Marcelo A.; Oyarzún-Ulloa, Joaquín E.; Fustos-Toribio, Ivo J.; Garrido-Urzua, Natalia; Chen, Ningsheng

doi:https://doi.org/10.5194/nhess-20-2319-2020

Articles | Volume 20, issue 8

https://doi.org/10.5194/nhess-20-2319-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-20-2319-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 8

Research article

|

26 Aug 2020

Research article |

| 26 Aug 2020

The mudflow disaster at Villa Santa Lucía in Chilean Patagonia: understandings and insights derived from numerical simulation and postevent field surveys

Marcelo A. Somos-Valenzuela, Joaquín E. Oyarzún-Ulloa, Ivo J. Fustos-Toribio, Natalia Garrido-Urzua, and Ningsheng Chen

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Mar 2020	108	27	1	136
Apr 2020	51	10	0	61
May 2020	76	9	3	88
Jun 2020	43	15	0	58
Jul 2020	27	10	6	43
Aug 2020	128	37	2	167
Sep 2020	182	25	2	209
Oct 2020	108	11	2	121
Nov 2020	162	21	2	185
Dec 2020	211	18	0	229
Jan 2021	93	18	0	111
Feb 2021	69	13	0	82
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Apr 2021	83	17	0	100
May 2021	95	13	1	109
Jun 2021	80	12	1	93
Jul 2021	88	12	0	100
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Oct 2021	95	52	0	147
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Dec 2021	81	20	0	101
Jan 2022	60	15	0	75
Feb 2022	65	11	1	77
Mar 2022	83	11	0	94
Apr 2022	69	38	1	108
May 2022	58	12	1	71
Jun 2022	82	7	2	91
Jul 2022	71	13	0	84
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Jan 2023	51	12	1	64
Feb 2023	49	17	0	66
Mar 2023	62	18	1	81
Apr 2023	54	10	3	67
May 2023	76	17	4	97
Jun 2023	56	12	1	69
Jul 2023	52	9	1	62
Aug 2023	49	12	3	64
Sep 2023	36	6	0	42

Cumulative views and downloads (calculated since 16 Mar 2020)

Month	HTML	PDF	XML	Total
Mar 2020	108	27	1	136
Apr 2020	51	10	0	61
May 2020	76	9	3	88
Jun 2020	43	15	0	58
Jul 2020	27	10	6	43
Aug 2020	128	37	2	167
Sep 2020	182	25	2	209
Oct 2020	108	11	2	121
Nov 2020	162	21	2	185
Dec 2020	211	18	0	229
Jan 2021	93	18	0	111
Feb 2021	69	13	0	82
Mar 2021	90	20	0	110
Apr 2021	83	17	0	100
May 2021	95	13	1	109
Jun 2021	80	12	1	93
Jul 2021	88	12	0	100
Aug 2021	80	10	0	90
Sep 2021	91	23	1	115
Oct 2021	95	52	0	147
Nov 2021	78	27	0	105
Dec 2021	81	20	0	101
Jan 2022	60	15	0	75
Feb 2022	65	11	1	77
Mar 2022	83	11	0	94
Apr 2022	69	38	1	108
May 2022	58	12	1	71
Jun 2022	82	7	2	91
Jul 2022	71	13	0	84
Aug 2022	84	8	0	92
Sep 2022	38	8	0	46
Oct 2022	74	9	1	84
Nov 2022	77	14	0	91
Dec 2022	52	6	0	58
Jan 2023	51	12	1	64
Feb 2023	49	17	0	66
Mar 2023	62	18	1	81
Apr 2023	54	10	3	67
May 2023	76	17	4	97
Jun 2023	56	12	1	69
Jul 2023	52	9	1	62
Aug 2023	49	12	3	64
Sep 2023	36	6	0	42

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Short summary

This work presents a study of the biggest mudflow event in 20 years in Chilean Patagonia, which resulted from an avalanche in the Cordon Yelcho. We integrate in situ geotechnical tests and numerical modeling to model the Villa Santa Lucía mudflow event. Our results suggest that the initial soil water content is sufficient to transform the landslide and scoured soil into a mudflow. Therefore, knowing the soil characteristics is crucial to evaluating the impact of landslides in the study area.