A Novel Sediment Transport Calculation
Method-Based 3D CFD Model Investigation
of a Critical Danube Reach

Török, Gergely T.; Józsa, János; Baranya, Sándor

doi:10.15244/pjoes/111877

Cited by 5 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If other parameters beyond the examined ones are negligible, this method may prove an effective tool in impact analysis with considerable accuracy. Note however, that if significant bed changes are expected, for example by a flood or anthropogenic habitat alterations, a 3D model cannot be avoided, as it provides a more reliable estimation of the near-bed conditions [42].…”

Section: Discussionmentioning

confidence: 99%

2D vs. 3D Numerical Approaches for Fish Habitat Evaluation of a Large River — Is 2D Modeling Sufficient?

Füstös¹,

Erős

Józsa

2021

Period. Polytech. Civil Eng.

Self Cite

View full text Add to dashboard Cite

Computational Fluid Dynamics is an effective tool for assessing non-present conditions, thus also in habitat evaluation within ecohydraulics. Deciding whether to apply a one-, two- or three-dimensional numerical approach, is an optimization that needs to be performed by every task, given the capability and the demands of specific approaches. In this paper we compare the utility of two-dimensional (2D) versus three-dimensional (3D) hydrodynamical simulations for ecohydraulic purposes. The basis of the comparation were 1) three simulated abiotic variables: water depth, depth averaged flow velocity and bed material composition, and 2) an overall performance in a meso-scale fish habitat evaluation, based on the simulated three variables. The biotic parameters for the models were the habitat suitability curves of three fish species, the Danube streber (Zingel streber), the round goby (Neogobius melanostomus) and the white bream (Blicca bjoerkna). We found that in terms of ecohydraulic utilization, the 2D approach performed sufficiently to simulate the hydrodynamics of a large river. The errors originating from the 3D-2D simplification yielded negligible differences in habitat evaluation, and the agreement in the habitat suitability indices calculated from the simulated metrics was satisfactory. Henceforth, the theory was turned into an application as we performed habitat mapping on a 100 km long, Hungarian reach of the Danube River, with the abiotic parameters resulting from a 2D hydrodynamical simulation. The possibility of simplifying the approach from 3D to 2D provides a cost-efficient numerical tool at larger scales for ecohydraulic studies, and especially for evaluating habitat suitability of riverine fish.

show abstract

Section: Discussionmentioning

confidence: 99%

2D vs. 3D Numerical Approaches for Fish Habitat Evaluation of a Large River — Is 2D Modeling Sufficient?

Füstös¹,

Erős

Józsa

2021

Period. Polytech. Civil Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The adaptation of measurements in aerated tanks can be improved by [6]. River flow is also driven by gravity and resulting in similar sedimentation and hydrodynamic phenomena [7] as storm sewer flow. CFD investigations were done for shallow settling tanks to calculate the ideal geometry [8].…”

Section: Methodsmentioning

confidence: 99%

Fluid Flow Model Applied for Environmental Problems at a Combined Sewer Structure

Knolmár¹,

Karches²,

Balogh³

2021

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

A junction structure of the greatest combined sewers of Budapest (Hungary) was under hydrodynamic and water quality examinations. The selected junction performs an important role in the operation of a combined sewer overflow. The main environmental effects are on the receiving water body, on the biggest main sewer and on the wastewater treatment plant. In the first step, one-dimensional hydrodynamic simulation was executed for the main and lateral inflow sewers. The simulation results were presenting the open surface elevations of the water flow. In the next step, a 3D fluid flow model was built based on a steady state simulated flow assumption. The resulting velocity and turbulence distribution were showing the critical points of the structure and the joining conduits. The simulation without the lateral inflow highlighted the negative effect of the lateral inflow. The high velocity of the inflowing water is forcing the main branch flow to slow down. The water level and the sedimentation are increasing upstream in the main sewer. Historical sediment volumes data and frequent flooding complaints are confirming the simulation results. Suggestions based on 3D model simulations are given for the improvements.

show abstract

Quantification of bedload transport in the Hungarian Danube using multiple analysis methods

Baranya

2024

International Journal of Sediment Research

View full text Add to dashboard Cite

A Novel Sediment Transport Calculation Method-Based 3D CFD Model Investigation of a Critical Danube Reach

Cited by 5 publications

References 26 publications

2D vs. 3D Numerical Approaches for Fish Habitat Evaluation of a Large River — Is 2D Modeling Sufficient?

2D vs. 3D Numerical Approaches for Fish Habitat Evaluation of a Large River — Is 2D Modeling Sufficient?

Fluid Flow Model Applied for Environmental Problems at a Combined Sewer Structure

Quantification of bedload transport in the Hungarian Danube using multiple analysis methods

Contact Info

Product

Resources

About