Impact of rainfall spatial aggregation on the identification of debris flow occurrence thresholds

Marra, Francesco; Destro, Elisa; Nikolopoulos, Efthymios I.; Zoccatelli, Davide; Creutin, Jean Dominique; Guzzetti, Fausto; Borga, Marco

doi:https://doi.org/10.5194/hess-21-4525-2017

Articles | Volume 21, issue 9

https://doi.org/10.5194/hess-21-4525-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-21-4525-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 21, issue 9

Research article

|

12 Sep 2017

Research article |

| 12 Sep 2017

Impact of rainfall spatial aggregation on the identification of debris flow occurrence thresholds

Francesco Marra, Elisa Destro, Efthymios I. Nikolopoulos, Davide Zoccatelli, Jean Dominique Creutin, Fausto Guzzetti, and Marco Borga

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Final revised paper (published on 12 Sep 2017)
Preprint (discussion started on 19 Jun 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review to hess-2017-308 - Impact of rainfall spatial aggregation on the identification of debris flow occurrence thresholds – Marra F. et al.', Anonymous Referee #1, 17 Jul 2017
- AC1: 'Response to RC1', Francesco Marra, 25 Jul 2017
RC2: 'Referee Comment on “Impact of rainfall spatial aggregation on the identiﬁcation of debris ﬂow occurrence thresholds” by Francesco Marra et al.', Anonymous Referee #2, 18 Jul 2017
- AC2: 'Response to RC2', Francesco Marra, 25 Jul 2017
RC3: 'Comment', Anonymous Referee #3, 20 Jul 2017
- AC3: 'Response to RC3', Francesco Marra, 25 Jul 2017

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (further review by Editor) (15 Aug 2017) by Thom Bogaard

AR by Francesco Marra on behalf of the Authors (15 Aug 2017) Author's response Manuscript

ED: Publish subject to technical corrections (16 Aug 2017) by Thom Bogaard

AR by Francesco Marra on behalf of the Authors (17 Aug 2017) Author's response Manuscript

Short summary

Previous studies have reported a systematic underestimation of debris flow occurrence thresholds, due to the use of sparse networks in non-stationary rain fields. We analysed high-resolution radar data to show that spatially aggregated estimates (e.g. satellite data) largely reduce this issue, in light of a reduced estimation variance. Our findings are transferable to other situations in which lower envelope curves are used to predict point-like events in the presence of non-stationary fields.