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This research aims to establish the continuity of flow resistance from overland to rill flows and develop a corresponding flow resistance law.

March 2, 2026Journal of HydrologyOpen Access

Flow resistance continuity from overland to rill flows: evidence from experimental data and theoretical implications

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Experimental data demonstrates flow resistance continuity in overland and rill flows, indicating key modeling implications.

This research aims to establish the continuity of flow resistance from overland to rill flows and develop a corresponding flow resistance law.
Conducted flume investigations using channels with rectangular cross-sections
Analyzed flow resistance measures in smooth and rough channels
Characterized friction factor values across different hydraulic conditions
Identified continuity in flow resistance as flow transitions from overland to rill conditions
Measured friction factors showed normal distribution with errors ≤ ±10% for 96.8% of cases
Proposed flow resistance law applicable for various channel cross-sections from wide to narrow rectangular designs

Palmeri et al. (2026) studied this question.

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