ORIGINAL RESEARCH
Q-SSC Behavior During Floods in the Isser
Watershed, (North-West of Algeria)
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1
'Eau et Ouvrage dans Leur Environnement' Laboratory, University of Tlemcen, BP 230, 13000 Tlemcen, Alegria
2
Institute of Technology, University of Bouira, 10000 Bouira, Algeria
Submission date: 2023-12-05
Final revision date: 2024-01-17
Acceptance date: 2024-03-05
Online publication date: 2024-06-19
Publication date: 2025-01-02
Corresponding author
Djouhra Baloul
University of Abou Bekr Belkaid, Faculty of Technology, Department of Hydraulic, Tlemcen, BP 230 Tlemcen, 13000, Algeria
Pol. J. Environ. Stud. 2025;34(1):21-28
KEYWORDS
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ABSTRACT
The study aims to establish a graphical relationship between sediment concentration (C)
and water discharge (Q) during flood events in the Isser catchment. Hysteresis, indicating
a time lag between discharge flow (Q) and suspended sediment concentration (SSC) curves,
varies based on sediment availability, event magnitude, and sequence. Based on the 2026 data
pairs of water discharge and suspended sediment concentration (Q-SSC), we have selected
22 flood events. The most frequent hysteresis loops were complex (10 loops), with 08
clockwise loops, 02 figure-eight loops, and 02 anti-clockwise loops. Complex hysteresis
loops accounted for 63% of solid loads and 37% of water discharge loads, while 50% of total
water yield and 23% of total sediment yield were associated with clockwise loops. Principal
Component Analysis (PCA) revealed that water discharge load, mean concentration, maximum
concentration, and concentration at the flow discharge peak are key variables influencing
hysteresis patterns.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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