### Abstract

Lingua originale | English |
---|---|

pagine (da-a) | 1-13 |

Numero di pagine | 13 |

Rivista | Stochastic Environmental Research and Risk Assessment |

Stato di pubblicazione | Published - 2019 |

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### All Science Journal Classification (ASJC) codes

- Environmental Engineering
- Environmental Chemistry
- Safety, Risk, Reliability and Quality
- Water Science and Technology
- Environmental Science(all)

### Cita questo

*Stochastic Environmental Research and Risk Assessment*, 1-13.

**Hydrological post-processing based on approximate Bayesian computation (ABC).** / Abbruzzo, Antonino; Adelfio, Giada; Romero-Cuellar, Jonathan; Francés, Félix.

Risultato della ricerca: Article

*Stochastic Environmental Research and Risk Assessment*, pagg. 1-13.

}

TY - JOUR

T1 - Hydrological post-processing based on approximate Bayesian computation (ABC)

AU - Abbruzzo, Antonino

AU - Adelfio, Giada

AU - Romero-Cuellar, Jonathan

AU - Francés, Félix

PY - 2019

Y1 - 2019

N2 - This study introduces a method to quantify the conditional predictive uncertainty in hydrological post-processing contexts when it is cumbersome to calculate the likelihood (intractable likelihood). Sometimes, it can be difficult to calculate the likelihood itself in hydrological modelling, specially working with complex models or with ungauged catchments. Therefore, we propose the ABC post-processor that exchanges the requirement of calculating the likelihood function by the use of some sufficient summary statistics and synthetic datasets. The aim is to show that the conditional predictive distribution is qualitatively similar produced by the exact predictive (MCMC post-processor) or the approximate predictive (ABC post-processor). We also use MCMC post-processor as a benchmark to make results more comparable with the proposed method. We test the ABC post-processor in two scenarios: (1) the Aipe catchment with tropical climate and a spatially-lumped hydrological model (Colombia) and (2) the Oria catchment with oceanic climate and a spatially-distributed hydrological model (Spain). The main finding of the study is that the approximate (ABC post-processor) conditional predictive uncertainty is almost equivalent to the exact predictive (MCMC post-processor) in both scenarios.

AB - This study introduces a method to quantify the conditional predictive uncertainty in hydrological post-processing contexts when it is cumbersome to calculate the likelihood (intractable likelihood). Sometimes, it can be difficult to calculate the likelihood itself in hydrological modelling, specially working with complex models or with ungauged catchments. Therefore, we propose the ABC post-processor that exchanges the requirement of calculating the likelihood function by the use of some sufficient summary statistics and synthetic datasets. The aim is to show that the conditional predictive distribution is qualitatively similar produced by the exact predictive (MCMC post-processor) or the approximate predictive (ABC post-processor). We also use MCMC post-processor as a benchmark to make results more comparable with the proposed method. We test the ABC post-processor in two scenarios: (1) the Aipe catchment with tropical climate and a spatially-lumped hydrological model (Colombia) and (2) the Oria catchment with oceanic climate and a spatially-distributed hydrological model (Spain). The main finding of the study is that the approximate (ABC post-processor) conditional predictive uncertainty is almost equivalent to the exact predictive (MCMC post-processor) in both scenarios.

KW - Free-likelihood approach

KW - Hydrological forecasting

KW - Probabilistic modelling

KW - Summary statistics

KW - Uncertainty analysis

UR - http://hdl.handle.net/10447/362887

UR - http://link.springer-ny.com/link/service/journals/00477/index.htm

M3 - Article

SP - 1

EP - 13

JO - Stochastic Environmental Research and Risk Assessment

JF - Stochastic Environmental Research and Risk Assessment

SN - 1436-3240

ER -