Laboratory studies on bedload transport under unsteady flow conditions
Authors:
- Magdalena M. Mrokowska,
- Paweł M. Rowiński,
- Leszek Książek,
- Andrzej Strużyński,
- Maciej Wyrębek,
- Artur Radecki-Pawlik
Abstract
Two sets of triangular hydrographs were generated in a 12-m-long laboratory flume for two sets of initial bed conditions: intact and water-worked gravel bed. Flowrate ranging from 0.0013 m3 s–1 to 0.0456 m3 s–1, water level ranging from 0.02 m to 0.11 m, and cumulative mass of transported sediment ranging from 4.5 kg to 14.2 kg were measured. Then, bedload transport rate, water surface slope, bed shear stress, and stream power were evaluated. The results indicated the impact of initial bed conditions and flow unsteadiness on bedload transport rate and total sediment yield. Difference in ratio between the amount of supplied sediment and total sediment yield for tests with different initial conditions was observed. Bedload rate, bed shear stress, and stream power demonstrated clock-wise hysteretic relation with flowrate. The study revealed practical aspects of experimental design, performance, and data analysis. Water surface slope evaluation based on spatial water depth data was discussed. It was shown that for certain conditions stream power was more adequate for the analysis of sediment transport dynamics than the bed shear stress. The relations between bedload transport dynamics, and flow and sediment parameters obtained by dimensional and multiple regression analysis were presented.
- Record ID
- CUT0fdad1a0d73449b280dada2aef99ab0b
- Publication categories
- ;
- Author
- Journal series
- Journal of Hydrology and Hydromechanics, ISSN 0042-790X, e-ISSN 1338-4333
- Issue year
- 2018
- Vol
- 66
- No
- 1
- Pages
- 23-31
- Other elements of collation
- fot.; tab.; wykr.; Bibliografia (na s.) - 30-31; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 66, Iss. 1
- Keywords in English
- bedload, bed shear stress, dimensional analysis, hysteresis, stream power, unsteady flow
- DOI
- DOI:10.1515/johh-2017-0032 Opening in a new tab
- URL
- https://www.sciendo.com/article/10.1515/johh-2017-0032 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 20
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT0fdad1a0d73449b280dada2aef99ab0b/
- URN
urn:pkr-prod:CUT0fdad1a0d73449b280dada2aef99ab0b
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.