An Analysis of the Sediment Transport Characteristics in the Aur River
Received: 14 January 2026 | Revised: 5 March 2026 and 29 March 2026 | Accepted: 1 April 2026 | Online: 6 June 2026
Corresponding author: Muhammad Amin
Abstract
Studies on river sediment characteristics have evolved, particularly regarding the interaction between hydrological dynamics and sediment transport. Based on hydraulic and sedimentological analysis, the Aur River is in an active morphodynamic condition with a flow transport capacity that significantly exceeds the sediment mobilization threshold, both for fine (D50) and coarse (D90) fractions. The very large value of the ratio of shear stress to critical stress (τ/τc) indicates that the river system is over-competent, so that fine sediment is always in suspension and coarse sediment is very easily transported as bed load. The longitudinal distribution shows a pattern of degradation in the upstream section, dominant transport in the middle section, and a tendency towards aggradation in the downstream section. The non-proportional increase in the discharge-concentration relationship indicates that this system operates in a supply-limited regime, where transport capacity exceeds the available sediment supply. Thus, the long-term stability of the river depends primarily on changes in sediment supply from the catchment area rather than on variations in flow energy alone.
Keywords:
sediment, river, bed load, degradationReferences
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Copyright (c) 2026 Muhammad Amin, Muhammad Saleh Pallu, Farouk Maricar, Rita Tahir Lopa
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