Title: Performance evaluation of an automated method for hydrograph separation in Mellah catchment, Northeastern Algeria
Authors: Sabri Berhail
Addresses: Technical Sciences Department, Abdelhafid Boussouf University, P.O. Box 26, Mila 43000, Algeria
Abstract: This paper explains a procedure based on the master recession curve (MRC) for hydrograph separation into individual flow components, using the recession constant K. To evaluate the performance of this computational technique, the results of the baseflow component were compared to the baseflow component obtained from the recursive digital filter (RDF) method. The study has revealed that the results of baseflow achieved by both methods show similarity to a great extent, and the baseflow values agree better with (R2 > 0.77). Moreover, automated baseflow separation underestimates the simulated baseflow from RDF method by as much as 2.35%, or overestimates it by up to 23.55%, during rainfall. These methods were applied to a set of hydrometric measures in the Mellah catchment, Algeria. The results proved that the proposed method gives a better estimate of flow components.
Keywords: hydrological processes; hydrograph separation; master recession curve; MRC; recession constant; baseflow; digital filter; Mellah catchment; Algeria.
International Journal of Hydrology Science and Technology, 2022 Vol.14 No.3, pp.251 - 267
Received: 15 Feb 2020
Accepted: 22 Nov 2020
Published online: 26 Sep 2022 *