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- W4310490181 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Extreme earthquake disturbances to local and regional landscape vegetation could rapidly impair original hydrologic functioning, significantly increasing the hydrologic nonstationarity and complexity in threshold behaviors of rainfall-runoff processes. It is unclear how alternating catchment behaviors under an ongoing large earthquake disruption are mediated by long-term interactions of landslides and vegetation evolutions. In a famous Wenchuan earthquake-affected watershed, China, the presence and form of three-linear stormflow threshold behaviors are examined, and both thresholds are identified as a diagnostic tool to characterize variations in hydrologic emergent patterns pre- and post-earthquake. It was revealed that lower <em>rising threshold</em> (<em>T<sub>r</sub></em>) value (210.48) in post-earthquake landslide regions exhibited faster stormflow responses, possibly triggering huge flood disasters. An <em>integrated watershed average</em> (<em>IWA</em>) index for both thresholds (<em>generation threshold T<sub>g-IWA</sub></em> and <em>T<sub>r-IWA</sub></em>) at the watershed scale was proposed based on long-term vegetation dynamics and threshold-based hydrological theory. The interannual variations of both hydrologic thresholds were assessed to detect the nonstationarity in hydrologic extremes and nonlinear runoff response pre- and post-earthquake. 2011 was a tipping point of the unsteady recovery process, as post-earthquake landslides evolutions reached a state of extreme heterogeneity in space. At that moment, the <em>T<sub>r-IWA</sub></em> value at the watershed scale decreased by ~ 9 mm compared to the pre-earthquake level, and the fast expansion of landslides generally led to a larger extension of variable source area from channel to neighboring hillslopes and faster subsurface stormflow contributing to flash floods. Additionally, we present a conceptual model interpreting how the short- and long-term interactions of earthquake-induced landslides and vegetation affect flood hydrographs at event timescale that generated an increased nonstationary hydrologic behavior. This study expands our knowledge about the threshold-based hydrological behavior and the nonstationary stormflow threshold behaviors in response to abrupt earthquake disturbance for the prediction of future flood regimes." @default.
- W4310490181 created "2022-12-11" @default.
- W4310490181 creator A5067865869 @default.
- W4310490181 date "2022-12-01" @default.
- W4310490181 modified "2023-09-30" @default.
- W4310490181 title "Reply on RC2" @default.
- W4310490181 doi "https://doi.org/10.5194/hess-2022-315-ac2" @default.
- W4310490181 hasPublicationYear "2022" @default.
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