In this paper, a recently theoretically deduced rill flow resistance equation, based on apower‐velocity profile, was tested using the Water Erosion Prediction Project database.This database includes measurements of flow velocity, water depth, cross sectionarea, wetted perimeter, and bed slope that were made in rills shaped onexperimental sites distributed across the continental United States. In particular, threedifferent experimental conditions (only rainfall, only flow, and rain with flow) wereexamined, and for each condition, the theoretically based relationship for estimatingthe Γ function of the power velocity profile was calibrated. The results establishedthat (a) the Darcy‐Weisbach friction factor can be accurately estimated using the proposedtheoretical approach, and (b) the flow resistance increases with the effect ofrainfall impact.
|Number of pages||11|
|Publication status||Published - 2019|
All Science Journal Classification (ASJC) codes
- Water Science and Technology