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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/hess-2019-503
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-503
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 15 Oct 2019

Submitted as: research article | 15 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

Hydrograph separation: an impartial parametrization for an imperfect method

Antoine Pelletier1,2 and Vazken Andréassian2 Antoine Pelletier and Vazken Andréassian
  • 1École des Ponts ParisTech, Champs-sur-Marne, France
  • 2Irstea, UR Hycar, Antony, France

Abstract. This paper presents a new method for hydrograph separation. It is well-known that all hydrological methods aiming at separating streamflow into baseflow and quickflow present large imperfections, and we do not claim to provide here a perfect solution. However, the method described here is at least (i) impartial in the determination of its two parameters (a quadratic reservoir capacity and a response time), (ii) coherent in time (as assessed by a split-sample test) and (iii) geologically coherent (an exhaustive validation on 1,664 French catchments shows a good match with what we know of France's hydrogeology). Last, an R package is provided to ensure reproducibility of the results presented.

Antoine Pelletier and Vazken Andréassian
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Antoine Pelletier and Vazken Andréassian
Antoine Pelletier and Vazken Andréassian
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Latest update: 13 Nov 2019
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Short summary
There are many ways for water to join a river after a rainfall event, but they can be split into two categories: the quick ones that remains in the surface and the slow ones that pass through the ground. Thus, measured streamflow of a river can be split into two components: quickflow and baseflow. We present a new method to perform this separation, using only streamflow and rainfall data, that are generally broadly available. It is then used as an analysis tool of river dynamics over France.
There are many ways for water to join a river after a rainfall event, but they can be split into...
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