Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloChanges in hydrological behaviours triggered by earthquake disturbance in a mountainous watershed
Anno di pubblicazione2020
Formato
  • Elettronico
  • Cartaceo
Autore/iZhang G.; Cui P.; Jin W.; Zhang Z.; Wang H.; Bazai N.A.; Li Y.; Liu D.; Pasuto A.
Affiliazioni autoriKey Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu, 610041, Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu 610041, China, , , China; Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu, 610041, Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu 610041, China, , , China; University of Chinese Academy of Sciences, Beijing, 100049, University of Chinese Academy of Sciences, Beijing 100049, China, , China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China, , China; Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China, , , China; Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing, 100101, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China, , , China; China-Pakistan Earth Science Joint Research Center, Islamabad, China-Pakistan Earth Science Joint Research Center, Islamabad, Pakistan, , Pakistan; Research Institute for Geo-hydrological Protection, Italian National Research Council, Padova, 351127, Research Institute for Geo-hydrological Protection, Italian National Research Council, Padova, 351127, Italy, , Italy
Autori CNR e affiliazioni
  • ALESSANDRO PASUTO
Lingua/e
  • inglese
AbstractLandslides induced by strong earthquakes often destroy large amounts of landscape vegetation which can trigger significant changes in runoff potential and flood flow. Little is known about hydrological behaviours imposed by co-seismic landslides and their post-earthquake evolution. Therefore, we collected time-series datasets (2007-2018) of underlying surface conditions (USC) changes including landslide expansion and recovery in a watershed affected by the Wenchuan earthquake to further quantify how the large physical disturbance affected the flood hydrological behaviours. The hydrological model HEC-HMS was calibrated and validated to predict the historical hydrological behaviours based on 5 min time-series data in rainfalls and streamflow (2018-2019), showing a good model performance with a mean Nash-Sutcliffe efficiency of 0.76. It was found that, shortly after the earthquake, the sharp expansion with 11% of landslide areas elevated the magnitudes of runoff potential, peak discharge, and runoff volume by >10%, and the peak to time for the high-magnitude flood was advanced by 25 min compared to the pre-earthquake levels. The tipping point along the hydrological disturbance-recovery trajectory was detected within 2011 with higher flood peaks and volumes, and the periods of 2011-2013 (i.e. 3-5 years post-earthquake) were deemed to be a rapid recovery period, revealing an unstable hydrological function. These findings are significant for clearly understanding the magnitude and timing, as well as greater risks of post-earthquake catastrophic flooding in earthquake-stricken regions. Additionally, the post-earthquake accompanied rainstorm-induced geohazards, which limited the recovery of landscape vegetation, triggering an undulant but clear recovery process (1-7 years post-earthquake) of hydrological behaviours. These findings promoted our understanding of the spatiotemporal evolution of hydrological behaviours triggered by the earthquake, and further contribute to the development of adaptation and mitigation strategies for the unpredictable flash floods triggered by future abrupt natural hazards in earthquake-affected regions.
Lingua abstractinglese
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RivistaScience of the total environment
Attiva dal 1972
Editore: Elsevier - Lausanne ;
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 0048-9697
Titolo chiave: Science of the total environment
Titolo abbreviato: Sci. total environ.
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DOI10.1016/j.scitotenv.2020.143349
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • Scopus (Codice:2-s2.0-85095729014)
Parole chiaveEarthquake, Landslides, Hydrological model
Link (URL, URI)http://www.scopus.com/record/display.url?eid=2-s2.0-85095729014&origin=inward
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Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR-
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