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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 21, issue 9
Hydrol. Earth Syst. Sci., 21, 4525-4532, 2017
https://doi.org/10.5194/hess-21-4525-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 21, 4525-4532, 2017
https://doi.org/10.5194/hess-21-4525-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

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 et al.
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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
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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.
Previous studies have reported a systematic underestimation of debris flow occurrence...
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