Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.5194/hess-26-6339-2022
Lizenz creative commons licence
Titel (primär) River flooding mechanisms and their changes in Europe revealed by explainable machine learning
Autor Jiang, S.; Bevacqua, E. ORCID logo ; Zscheischler, J. ORCID logo
Quelle Hydrology and Earth System Sciences
Erscheinungsjahr 2022
Department CHS
Band/Volume 26
Heft 24
Seite von 6339
Seite bis 6359
Sprache englisch
Topic T5 Future Landscapes
Daten-/Softwarelinks https://doi.org/10.1594/PANGAEA.887477
https://doi.org/10.5281/zenodo.4686106
Supplements https://hess.copernicus.org/articles/26/6339/2022/hess-26-6339-2022-supplement.pdf
Abstract Climate change may systematically impact hydrometeorological processes and their interactions, resulting in changes in flooding mechanisms. Identifying such changes is important for flood forecasting and projection. Currently, there is a lack of observational evidence regarding trends in flooding mechanisms in Europe, which requires reliable methods to disentangle emerging patterns from the complex interactions between flood drivers. Recently, numerous studies have demonstrated the skill of machine learning (ML) for predictions in hydrology, e.g., for predicting river discharge based on its relationship with meteorological drivers. The relationship, if explained properly, may provide us with new insights into hydrological processes. Here, by using a novel explainable ML framework, combined with cluster analysis, we identify three primary patterns that drive 53 968 annual maximum discharge events in around a thousand European catchments. The patterns can be associated with three catchment-wide river flooding mechanisms: recent precipitation, antecedent precipitation (i.e., excessive soil moisture), and snowmelt. The results indicate that over half of the studied catchments are controlled by a combination of the above mechanisms, especially recent precipitation in combination with excessive soil moisture, which is the dominant mechanism in one-third of the catchments. Over the past 70 years, significant changes in the dominant flooding mechanisms have been detected within a number of European catchments. Generally, the number of snowmelt-induced floods has decreased significantly, whereas floods driven by recent precipitation have increased. The detected changes in flooding mechanisms are consistent with the expected climate change responses, and we highlight the risks associated with the resulting impact on flooding seasonality and magnitude. Overall, the study offers a new perspective on understanding changes in weather and climate extreme events by using explainable ML and demonstrates the prospect of future scientific discoveries supported by artificial intelligence.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26181
Jiang, S., Bevacqua, E., Zscheischler, J. (2022):
River flooding mechanisms and their changes in Europe revealed by explainable machine learning
Hydrol. Earth Syst. Sci. 26 (24), 6339 - 6359 10.5194/hess-26-6339-2022