Regional rainfall thresholds for landslide occurrence  using a centenary database

Vaz, Teresa; Zêzere, José Luís; Pereira, Susana; Oliveira, Sérgio Cruz; Garcia, Ricardo A. C.; Quaresma, Ivânia

doi:10.5194/nhess-18-1037-2018

Articles | Volume 18, issue 4

https://doi.org/10.5194/nhess-18-1037-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Landslide early warning systems: monitoring systems, rainfall...

https://doi.org/10.5194/nhess-18-1037-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 4

Research article

|

04 Apr 2018

Research article |

| 04 Apr 2018

Regional rainfall thresholds for landslide occurrence using a centenary database

Teresa Vaz, José Luís Zêzere, Susana Pereira, Sérgio Cruz Oliveira, Ricardo A. C. Garcia, and Ivânia Quaresma

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Cumulative views and downloads (calculated since 25 Oct 2017)

Month	HTML	PDF	XML	Total
Oct 2017	86	25	2	113
Nov 2017	81	22	1	104
Dec 2017	39	11	2	52
Jan 2018	22	5	0	27
Feb 2018	39	7	6	52
Mar 2018	22	8	0	30
Apr 2018	139	57	8	204
May 2018	81	27	4	112
Jun 2018	26	21	3	50
Jul 2018	27	21	2	50
Aug 2018	35	19	2	56
Sep 2018	24	19	0	43
Oct 2018	23	16	4	43
Nov 2018	22	14	2	38
Dec 2018	22	16	1	39
Jan 2019	10	20	1	31
Feb 2019	11	11	0	22
Mar 2019	14	17	1	32
Apr 2019	14	21	1	36
May 2019	15	12	1	28
Jun 2019	32	19	0	51
Jul 2019	12	9	1	22
Aug 2019	15	10	0	25
Sep 2019	12	9	0	21
Oct 2019	25	24	1	50
Nov 2019	14	8	0	22
Dec 2019	11	11	0	22
Jan 2020	16	10	2	28
Feb 2020	14	12	1	27
Mar 2020	4	2	0	6
Apr 2020	13	11	0	24
May 2020	16	7	0	23
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Aug 2020	14	12	2	28
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Nov 2020	12	16	2	30
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Feb 2022	16	9	2	27
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Jun 2022	20	8	2	30
Jul 2022	41	9	0	50
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Nov 2022	71	17	0	88
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Apr 2024	30	7	8	45
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Jun 2024	34	10	3	47
Jul 2024	28	20	2	50
Aug 2024	43	4	3	50
Sep 2024	24	5	1	30
Oct 2024	32	8	1	41
Nov 2024	32	6	1	39
Dec 2024	26	7	1	34
Jan 2025	53	11	0	64
Feb 2025	38	7	0	45
Mar 2025	14	13	0	27
Apr 2025	36	10	3	49
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Jun 2025	46	11	0	57
Jul 2025	36	25	3	64
Aug 2025	33	12	2	47
Sep 2025	32	17	1	50
Oct 2025	29	19	2	50
Nov 2025	44	18	4	66
Dec 2025	75	50	5	130
Jan 2026	49	13	7	69

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Short summary

This work proposes a comprehensive method to assess rainfall thresholds for landslide initiation using centenary landslide and rainfall data. The method includes the identification of critical rainfall related to each landslide event, the calculation and calibration of rainfall thresholds and the evaluation of rain gauge spatial representativeness. Results show that thresholds based on a probabilistic approach are highly recommended and can be easily included in early warning systems.


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