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Título : | Flash-flood forecasting in an andean mountain catchment-development of a step-wise methodology based on the random forest algorithm |
Autor: | Muñoz Pauta, Paul Andres Orellana Alvear, Johanna Marlene Willems, Patrick Celleri Alvear, Rolando Enrique |
Correspondencia: | Muñoz Pauta, Paul Andres, paul.andres.munoz@gmail.com |
Palabras clave : | Flash-Flood Forecasting Lag Analysis Machine Learning Precipitation-Runoff Random Forest |
Área de conocimiento FRASCATI amplio: | 1. Ciencias Naturales y Exactas |
Área de conocimiento FRASCATI detallado: | 1.5.10 Recursos Hídricos |
Área de conocimiento FRASCATI específico: | 1.5 Ciencias de la Tierra y el Ambiente |
Área de conocimiento UNESCO amplio: | 05 - Ciencias Físicas, Ciencias Naturales, Matemáticas y Estadísticas |
ÁArea de conocimiento UNESCO detallado: | 0522 - Medio Ambiente y Vida Silvestre |
Área de conocimiento UNESCO específico: | 052 - Medio Ambiente |
Fecha de publicación : | 2018 |
Volumen: | volumen 10, número 11 |
Fuente: | Water (Switzerland) |
metadata.dc.identifier.doi: | 10.3390/w10111519 |
Tipo: | ARTÍCULO |
Abstract: | Flash-flood forecasting has emerged worldwide due to the catastrophic socio-economic impacts this hazard might cause and the expected increase of its frequency in the future. In mountain catchments, precipitation-runoff forecasts are limited by the intrinsic complexity of the processes involved, particularly its high rainfall variability. While process-based models are hard to implement, there is a potential to use the random forest algorithm due to its simplicity, robustness and capacity to deal with complex data structures. Here a step-wise methodology is proposed to derive parsimonious models accounting for both hydrological functioning of the catchment (eg, input data, representation of antecedent moisture conditions) and random forest procedures (eg, sensitivity analyses, dimension reduction, optimal input composition). The methodology was applied to develop short-term prediction models of varying time duration (4, 8, 12, 18 and 24 h) for a catchment representative of the Ecuadorian Andes. Results show that the derived parsimonious models can reach validation efficiencies (Nash-Sutcliffe coefficient) from 0.761 (4-h) to 0.384 (24-h) for optimal inputs composed only by features accounting for 80% of the model’s outcome variance. Improvement in the prediction of extreme peak flows was demonstrated (extreme value analysis) by including precipitation information in contrast to the use of pure autoregressive models. View Full-Text |
Resumen : | Flash-flood forecasting has emerged worldwide due to the catastrophic socio-economic impacts this hazard might cause and the expected increase of its frequency in the future. In mountain catchments, precipitation-runoff forecasts are limited by the intrinsic complexity of the processes involved, particularly its high rainfall variability. While process-based models are hard to implement, there is a potential to use the random forest algorithm due to its simplicity, robustness and capacity to deal with complex data structures. Here a step-wise methodology is proposed to derive parsimonious models accounting for both hydrological functioning of the catchment (eg, input data, representation of antecedent moisture conditions) and random forest procedures (eg, sensitivity analyses, dimension reduction, optimal input composition). The methodology was applied to develop short-term prediction models of varying time duration (4, 8, 12, 18 and 24 h) for a catchment representative of the Ecuadorian Andes. Results show that the derived parsimonious models can reach validation efficiencies (Nash-Sutcliffe coefficient) from 0.761 (4-h) to 0.384 (24-h) for optimal inputs composed only by features accounting for 80% of the model’s outcome variance. Improvement in the prediction of extreme peak flows was demonstrated (extreme value analysis) by including precipitation information in contrast to the use of pure autoregressive models. View Full-Text |
URI : | http://dspace.ucuenca.edu.ec/handle/123456789/33168 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85055719343&origin=inward |
URI Fuente: | https://www.scimagojr.com/journalsearch.php?q=21100255400&tip=sid&clean=0 |
ISSN : | 20734441 |
Aparece en las colecciones: | Artículos
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