In: Journal of Hydrology and Hydromechanics, vol. 65, no. 4
Hossein Afzalimehr - Mohammad Reza Maddahi - Jueyi Sui
Details:
Year, pages: 2017, 366 - 377
Keywords:
Bedform characteristics; Gravel-bed river; Field measurements; Form friction factor.
Original source URL: http://www.ih.sav.sk/jhh
About article:
Estimation of hydraulic and geometric parameters of a gravel-bed river such as dimensions of bedforms is
very difficult task, although they play a fundamental role in river engineering projects. One of the methods to get essential
information regarding the bedform characteristics is to find the relations between the flow parameters and bedform
dimensions. We conducted this field study in the Babolroud River in northern Iran to investigate the application of double
averaged method in unspecific gravel bedforms to evaluate friction factor. Using data collected from several river
reaches with total length of 356 m of a gravel-bed river, the relationship between bedform geometry (height and the
length of bedforms) and flow parameters including shear velocity, transport stage parameter with friction factor is investigated.
Different methods for estimating bedforms dimensions are examined to assess the ability of predicting bedform
parameters (length and height) in a gravel-bed river. Using bedform parameters, the contribution of particle and form
friction is estimated. Results confirm the application of the double averaged method and existing bedform parameters for
unspecific bedforms. There exists a similar trend between aspect ratio and friction factor in gravel bedforms.
How to cite:
ISO 690:
Afzalimehr, H., Maddahi, M., Sui, J. 2017. Bedform characteristics in a gravel-bed river. In Journal of Hydrology and Hydromechanics, vol. 65, no.4, pp. 366-377. 0042-790X (until 2019) .
APA:
Afzalimehr, H., Maddahi, M., Sui, J. (2017). Bedform characteristics in a gravel-bed river. Journal of Hydrology and Hydromechanics, 65(4), 366-377. 0042-790X (until 2019) .