Mean flow velocity, V, is one of the most important hydrodynamic variables for rill erosion phenomena. The measurement of flow velocity is fundamental to obtain predictive relationships for modeling water soil erosion and can be performed by the dye tracer technique. This method gives the surface flow velocity Vs, which needs to be multiplied by a correction factor αv to obtain V. This paper is aimed to evaluate αv for two different rill roughness conditions, using an experimental set up which simulates flows moving in fixed bed rills. In particular, two flumes covered by soils with different textures, named Sparacia and Aranceto, were used. For each roughness, ten slopes values ranging from 0.1% to 15% were investigated and, for a given slope, five discharges Q (0.20 – 0.87 L s‐1) were applied. For each (Q, s) pair 20 measurements of Vs were performed. The results showed that the correction factor is independent of the Reynolds number for both the roughness conditions. For the Sparacia soil, for the higher s values, αv can be estimated by a particular Froude number Fs and s, while is constant for the lower s values. For the Aranceto soil, no statistically significant relationships were detected. Finally, the correction factor increased with roughness, but only for a limited slope range concerning the lowest investigated s values.

Costanza Di Stefano, A.L. (2024). Measuring rill flow velocity by dye tracer technique. In V. Bagarello, C. Di Stefano, M. Iovino, V. Ferro (a cura di), La ricerca nel settore dell'idraulica agraria, dell'irrigazione e delle sistemazioni idraulico-forestali. Giornate di Studio in onore del Prof. Giuseppe Provenzano. (pp. 407-414). Cosenza : EdiBios.

Measuring rill flow velocity by dye tracer technique

Costanza Di Stefano
Membro del Collaboration Group
;
Antonino Lucchese
Membro del Collaboration Group
;
Alessio Nicosia
Membro del Collaboration Group
;
Vincenzo Palmeri
Membro del Collaboration Group
;
Vincenzo Pampalone
Membro del Collaboration Group
;
Vito Ferro
Membro del Collaboration Group
2024-05-01

Abstract

Mean flow velocity, V, is one of the most important hydrodynamic variables for rill erosion phenomena. The measurement of flow velocity is fundamental to obtain predictive relationships for modeling water soil erosion and can be performed by the dye tracer technique. This method gives the surface flow velocity Vs, which needs to be multiplied by a correction factor αv to obtain V. This paper is aimed to evaluate αv for two different rill roughness conditions, using an experimental set up which simulates flows moving in fixed bed rills. In particular, two flumes covered by soils with different textures, named Sparacia and Aranceto, were used. For each roughness, ten slopes values ranging from 0.1% to 15% were investigated and, for a given slope, five discharges Q (0.20 – 0.87 L s‐1) were applied. For each (Q, s) pair 20 measurements of Vs were performed. The results showed that the correction factor is independent of the Reynolds number for both the roughness conditions. For the Sparacia soil, for the higher s values, αv can be estimated by a particular Froude number Fs and s, while is constant for the lower s values. For the Aranceto soil, no statistically significant relationships were detected. Finally, the correction factor increased with roughness, but only for a limited slope range concerning the lowest investigated s values.
mag-2024
Settore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestali
978-88-97181-89-7
Costanza Di Stefano, A.L. (2024). Measuring rill flow velocity by dye tracer technique. In V. Bagarello, C. Di Stefano, M. Iovino, V. Ferro (a cura di), La ricerca nel settore dell'idraulica agraria, dell'irrigazione e delle sistemazioni idraulico-forestali. Giornate di Studio in onore del Prof. Giuseppe Provenzano. (pp. 407-414). Cosenza : EdiBios.
File in questo prodotto:
File Dimensione Formato  
2024_DiStefano_et_al_QIM_3.pdf

Solo gestori archvio

Tipologia: Versione Editoriale
Dimensione 916.68 kB
Formato Adobe PDF
916.68 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/638442
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact