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Erschienen in: Environmental Earth Sciences 15/2019

01.08.2019 | Original Article

AGCT: a hybrid model for identifying abrupt and gradual change in hydrological time series

verfasst von: Shuqi Zhang, Hongbo Zhang, Jicheng Li, Jiaojiao Li

Erschienen in: Environmental Earth Sciences | Ausgabe 15/2019

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Abstract

A new hybrid model called the AGCT model has been proposed for identifying an abrupt and gradual change in a hydrological time series. This hybrid model combining the over-whitening procedure, Pettitt test, and Mann–Kendall test can measure abrupt and gradual changes in hydrological series with mixed-mode shift and weight the attributions of two types of changes to the shift. In addition, four types of shifts were defined as gradual change, gradual-leading change, abrupt-leading change, and abrupt change in this study to describe the shifts observed well, which can provide more detailed and useful insights into changes in hydrological time series. Using the Wuding River Basin in China as a case study, the results indicated that the AGCT model can effectively separate the abrupt-change component from a complex shift, measuring the abrupt and gradual changes embedded in a streamflow time series, and further determine the shift type of the series. In addition, it is considered as a feasible method to steady the nonstationary streamflow data for frequency analysis.

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Literatur
Zurück zum Zitat Mo XG, Liu SX, Lin ZG, Zhao WM (2003) Prediction of evapotranspiration and streamflow with a distributed model over the large Wuding River basin. Iahs Publication Int Assoc Hydrological Sciences 301-307 Mo XG, Liu SX, Lin ZG, Zhao WM (2003) Prediction of evapotranspiration and streamflow with a distributed model over the large Wuding River basin. Iahs Publication Int Assoc Hydrological Sciences 301-307
Zurück zum Zitat Wang H, Wang CM, Wang JH, Zhou ZH, Chen YM (2004) Theory of annual runoff evolution under natural-artificial dual mode and case study of Wuding River basin on the middle Yellow River. Science in China 47(1 Supplement):51–59. https://doi.org/10.1360/04ez0005 CrossRef Wang H, Wang CM, Wang JH, Zhou ZH, Chen YM (2004) Theory of annual runoff evolution under natural-artificial dual mode and case study of Wuding River basin on the middle Yellow River. Science in China 47(1 Supplement):51–59. https://​doi.​org/​10.​1360/​04ez0005 CrossRef
Metadaten
Titel
AGCT: a hybrid model for identifying abrupt and gradual change in hydrological time series
verfasst von
Shuqi Zhang
Hongbo Zhang
Jicheng Li
Jiaojiao Li
Publikationsdatum
01.08.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Environmental Earth Sciences / Ausgabe 15/2019
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI
https://doi.org/10.1007/s12665-019-8453-3

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