6533b85ffe1ef96bd12c107d
RESEARCH PRODUCT
Testing a new rill flow resistance approach using the Water Erosion Prediction Project experimental database
Vito FerroCostanza Di StefanoMark A. NearingVincenzo PalmeriVincenzo PampaloneAlessio Nicosiasubject
Flow resistancegeographyWater erosiongeography.geographical_feature_categorysoil erosionself-similarity0208 environmental biotechnology04 agricultural and veterinary sciences02 engineering and technology020801 environmental engineeringRill040103 agronomy & agriculture0401 agriculture forestry and fisheriesSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliGeotechnical engineeringrill erosionflow resistanceGeologyWater Science and Technologydescription
In this paper, a recently theoretically deduced rill flow resistance equation, based on a power‐velocity profile, was tested using the Water Erosion Prediction Project database. This database includes measurements of flow velocity, water depth, cross section area, wetted perimeter, and bed slope that were made in rills shaped on experimental sites distributed across the continental United States. In particular, three different experimental conditions (only rainfall, only flow, and rain with flow) were examined, and for each condition, the theoretically based relationship for estimating the Γ function of the power velocity profile was calibrated. The results established that (a) the Darcy‐Weisbach friction factor can be accurately estimated using the proposed theoretical approach, and (b) the flow resistance increases with the effect of rainfall impact.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-12-19 |