Articles | Volume 24, issue 2
https://doi.org/10.5194/hess-24-849-2020
https://doi.org/10.5194/hess-24-849-2020
Research article
 | 
25 Feb 2020
Research article |  | 25 Feb 2020

Beyond binary baseflow separation: a delayed-flow index for multiple streamflow contributions

Michael Stoelzle, Tobias Schuetz, Markus Weiler, Kerstin Stahl, and Lena M. Tallaksen

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Cited articles

Aksoy, H., Unal, N. E., and Pektas, A. O.: Smoothed minima baseflow separation tool for perennial and intermittent streams, Hydrol. Process., 22, 4467–4476, https://doi.org/10.1002/hyp.7077, 2008. 
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Baker, D. B., Richards, R. P., Loftus, T. T., and Kramer, J. W.: A New Flashiness Index: Characteristics And Applications To Midwestern Rivers And Streams, J. Am. Water Resour. Assoc., 40, 503–522, https://doi.org/10.1111/j.1752-1688.2004.tb01046.x, 2004. 
Bond, N.: Hydrological Indices for Daily Time Series Data, available at: https://CRAN.R-project.org/package=hydrostats (last access: 22 February 2020), 2016. 
Botter, G.: Flow regime shifts in the Little Piney creek (US), Adv. Water. Resour., 71, 44–54, https://doi.org/10.1016/j.advwatres.2014.05.010, 2014. 
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Short summary
During dry weather, different delayed sources of runoff (e.g. from groundwater, wetlands or snowmelt) modulate the magnitude and variability of streamflow. Hydrograph separation methods often do not distinguish these delayed contributions and mostly pool them into only two components (i.e. quickflow and baseflow). We propose a method that uncovers multiple components and demonstrates how they better reflect streamflow generation processes of different flow regimes.