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Identification of flow components with the trigonometric hydrograph separation method: a case study from Madjez Ressoul catchment, Algeria

  • ICWEES2018 & IWFC2018
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Abstract

Madjez Ressoul catchment constitutes an important source of fresh water and arable land in northeastern Algeria. In order to achieve better management of the catchments’ natural resources, specifically water, an advanced flood recession analysis was conducted, using the recession analysis-based trigonometric approach, which was based completely on a mathematical solution. This approach provides very useful results for the master recession curves construction. The advantage of this method in the hydrograph separation is both its non-subjectivity related to the user, and then its viability for initial use in the hydrograph separation field. Results in this real case give a better indication of groundwater flow during different drought periods, using many assessed parameters of initial discharge and relative recession time. A particular review of existing hydrograph separation techniques is used to situate the recession analysis and show its case of application relative to other techniques.

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Acknowledgments

With special appreciation, the authors would like to dedicate this research paper to the developer of the trigonometric hydrographic separation method, Posavec Kristian, using his Excel Macro, which included data from the National Agency of Hydraulic Resources (ANRH) provided an invaluable source of information. This work was developed with the support of the PRFU-MESRS Project named Analysis of potential impact of Climate Change on Rainfall Extreme, Flooding, and Urban Drainage Systems.

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Correspondence to Asma Dahak.

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This article is part of the Topical Collection on Geo-environmental integration for sustainable development of water, energy, environment and society

Appendix

Appendix

Symbols

Description

Dimension

Q t

Stream discharge at time t

L3T−1

Q 0

Initial stream discharge

L3T−1

α

Exponent depending on the ratio of the storage to discharge in the groundwater reservoir.

/

S

Storage in the soil reservoir

L3

Q

Stream discharge

L3T−1

K

Recession constant of the soil reservoir

T−1

n , A

Constants

/

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Dahak, A., Boutaghane, H. Identification of flow components with the trigonometric hydrograph separation method: a case study from Madjez Ressoul catchment, Algeria. Arab J Geosci 12, 463 (2019). https://doi.org/10.1007/s12517-019-4616-5

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  • DOI: https://doi.org/10.1007/s12517-019-4616-5

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