Increased nonstationarity of stormflow threshold behaviors in a forested watershed due to abrupt earthquake disturbance
Abstract r) value (210.48 mm) observed in post-earthquake local landslide regions exhibited a faster stormflow response rate than that in undisturbed forest and grassland–shrubland regions, easily triggering huge flash-flood disasters. Additionally, an integrated response metric pair (integrated watershed average generation threshold THg - IWA r - IWA) with areas of disparate land use, ecology, and physiography was proposed and efficiently applied to identify emergent catchment hydrologic behaviors. The interannual variation in the two integrated hydrologic thresholds before and following the earthquake was assessed to detect the temporal nonstationarity in hydrologic extremes and nonlinear runoff response. The year 2011 was an important turning point along the hydrologic disturbance–recovery timescale following the earthquake, as post-earthquake landslide evolution reached a state of extreme heterogeneity in space. At that time, the THr - IWA ∼ 9 mm compared with the pre-earthquake level. This is closely related to the fast expansion of landslides, leading to a larger extension of variable source area from the channel to neighboring hillslopes, and faster subsurface stormflow, contributing to flash floods. Finally, we present a conceptual model interpreting how the short- and long-term interactions between earthquake-induced landslides and vegetation affect flood hydrographs at event timescale that generated an increased nonstationary hydrologic behavior. This study expands our current knowledge of threshold-based hydrologic and nonstationary stormflow behaviors in response to abrupt earthquake disturbance for the prediction of future flood regimes.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Increased nonstationarity of stormflow threshold behaviors in a forested watershed due to abrupt earthquake disturbance ; volume:27 ; number:15 ; year:2023 ; pages:3005-3020 ; extent:16
Hydrology and earth system sciences ; 27, Heft 15 (2023), 3005-3020 (gesamt 16)
- Klassifikation
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Geowissenschaften
- Urheber
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Zhang, Guotao
Cui, Peng
Gualtieri, Carlo
Bazai, Nazir Ahmed
Zhang, Xueqin
Zhang, Zhengtao
- DOI
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10.5194/hess-27-3005-2023
- URN
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urn:nbn:de:101:1-2023081704233487383008
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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14.08.2025, 11:00 MESZ
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Beteiligte
- Zhang, Guotao
- Cui, Peng
- Gualtieri, Carlo
- Bazai, Nazir Ahmed
- Zhang, Xueqin
- Zhang, Zhengtao
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