In: Journal of Hydrology and Hydromechanics, vol. 66, no. 1
Paola Gualtieri - Sergio De Felice - Vittorio Pasquino - Guelfo Doria
Detaily:
Rok, strany: 2018, 107 - 120
O článku:
This study examines the problem of flow resistance due to rigid vegetation in open channel flow. The reliability
of the conventional flow resistance equations (i.e. Keulegan, Manning and Chézy-Bazin) for vegetated flows at high
submergence, i.e. h/k >5, (where h = flow depth and k = vegetation height) is assessed. Several modern flow resistance
equations based on a two-layer approach are examined, showing that they transform into the conventional equations at
high submergences. To compare the conventional flow resistance equations at high submergences, an experimental
methodology is proposed and applied to the experimental data reported in the literature and collected for this study. The
results demonstrate the reliability of the Keulegan equation in predicting the flow resistance. Based on the obtained results,
a model to evaluate the Nikuradse equivalent sand-grain roughness, kN, starting from the vegetation height and density,
is proposed and tested.
Ako citovať:
ISO 690:
Gualtieri, P., De Felice, S., Pasquino, V., Doria, G. 2018. Use of conventional flow resistance equations and a model for the Nikuradse
roughness in vegetated flows at high submergence. In Journal of Hydrology and Hydromechanics, vol. 66, no.1, pp. 107-120. 0042-790X (until 2019) .
APA:
Gualtieri, P., De Felice, S., Pasquino, V., Doria, G. (2018). Use of conventional flow resistance equations and a model for the Nikuradse
roughness in vegetated flows at high submergence. Journal of Hydrology and Hydromechanics, 66(1), 107-120. 0042-790X (until 2019) .