Lane’s Relation in Local Scour Investigations

Kiraga, Marta; Miszkowska, Anna

doi:10.1109/access.2020.3013275

Cited by 2 publications

(4 citation statements)

References 16 publications

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“…Maximal scour depth ranged from 1 to 10 cm. The criterion for the reach infested by the scour is bed level, i.e., scour, is recognized within an area in which the depth of the bottom after 8-hour measurement series exceeds 10% of the maximum hole depth (Kiraga & Miszkowska, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…A group of experiments carried out in a hydraulic laboratory, the results of which were published, among others, in Water or IEEE Access journals (Kiraga & Popek, 2016;Kiraga & Popek, 2019;Kiraga & Miszkowska, 2020), concerned the phenomenon of formation of local scouring as a result of not only varied roughness of the materials building the bed, but also the restriction of the flow field by inserting a model of Full-size DOI: 10.7717/peerj.10282/fig- 1 damming structures into the flume. Namely, due to the flow resistance increment along the whole flume resulting from varied roughness of solid and sandy bottom, the hydraulic gradient increases causing the intensification of shear stress at the bottom.…”

Section: Methodsmentioning

confidence: 99%

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On local scouring downstream small water structures

Kiraga

Popek

2020

PeerJ

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Background In order to regulate water flow, hydraulic structures such as weirs or checks, frequently equipped with gates, are used. Water can flow below or over the gate or, simultaneously, over and below the gate. Both diversifications of hydraulic gradient, being an effect of damming up a river by the structure and shear stresses at the bed, which exceeds the critical shear stress value, invoke the local scouring downstream the structure. This phenomenon has been studied in laboratory and field conditions for many years, however Researchers do not agree on the parameters that affect the size of the local scour and the intensity of its formation. There are no universal methods for estimating its magnitude However, solutions are sought in the form of calculation formulas typical for the method of flow through the structure, taking into account the parameters that characterize a given structure. These formulas are based on factors that affect the size of the local scours, that is, their dimensions and location. Examples of such formulas are those contained in this article: Franke (1960), Straube (1963), Tarajmovič (1966), Rossinski & Kuzmin (1969) equations. The need to study this phenomenon results from the prevalence of hydrotechnical structures equipped with gates (from small gated checks to large weirs) and from potential damage that may be associated with excessive development of local erosion downstream, including washing of foundations and, consequently, loss of stability of the structure. Methods This study verifies empirical formulas applied to estimate the geometry parameters of a scour hole on a laboratory model of a structure where water is conducted downstream the gate with bottom reinforcements of various roughness. A specially designed remote-controlled measuring device, equipped with laser scanner, was applied to determine the shape of the sandy bottom. Then the formula optimization is conducted, using Monte Carlo sampling method, followed by verification of field conditions. Results The suitability of a specially designed device, equipped with laser scanner for measuring the bottom shape in laboratory conditions was demonstrated. Simple formula describing local scour geometry in laboratory conditions was derived basing on the Straube formula. The optimized formula was verified in field conditions giving very good comparative results. Therefore, it can be applied in engineering and designing practices.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

On local scouring downstream small water structures

Kiraga

Popek

2020

PeerJ

View full text Add to dashboard Cite

show abstract

“…The criterion for the reach infested by the scour is bed level, i.e. scour, is recognized within an area in which the depth of the bottom after 8-hour measurement series exceeds 10% of the maximum hole depth (Kiraga and Miszkowska 2020).…”

Section: Resultsmentioning

confidence: 99%

“…A group of experiments carried out in a hydraulic laboratory, the results of which were published, among others, in Water or IEEE Access journals (Kiraga and Popek 2016;Kiraga and Popek 2019;Kiraga and Miszkowska 2020), concerned the phenomenon of formation of local scouring as a result of not only varied roughness of the materials building the bed, but also the restriction of the flow field by inserting a model of damming structures into the flume. Namely, due to the flow resistance increment along the whole flume resulting from varied roughness of solid and sandy bottom, the hydraulic gradient increases causing the intensification of shear stress at the bottom.…”

Section: Methodsmentioning

confidence: 99%

Peer Review #1 of "On local scouring downstream small water structures (v0.1)"

Szydłowski¹

2020

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Lane’s Relation in Local Scour Investigations

Abstract: The applied device was engineered in 2016 by Marta Kiraga and Matvey Razumnik within the university grant "The influence of small hydraulic structures on sediment transport condition".

Cited by 2 publications

References 16 publications

On local scouring downstream small water structures

On local scouring downstream small water structures

Peer Review #1 of "On local scouring downstream small water structures (v0.1)"

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