Analysis of in-Stream Restoration Structures Impact on Hydraulic Condition and Sedimentation in the Flinta River, Poland

Szałkiewicz, Ewelina; Dysarz, Tomasz; Kałuża, Tomasz; Malinger, Albert; Radecki‐Pawlik, Artur

doi:10.26471/cjees/2019/014/079

Cited by 15 publications

(9 citation statements)

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“…On the other hand, in the analysis against Y-profiles (Figure 7D), the fluctuation of the transverse velocity v y along the length of the channel caused by the hydraulic influence of alternating vegetation zones is most clearly visible (Figures 3 and 4). This hydraulic phenomenon has also been observed by several other research teams [44][45][46][47][48].…”

Section: Spatial Distribution Of the V Y Velocity (The Lateral Compon...supporting

confidence: 82%

Hydraulic Effect of Vegetation Zones in Open Channels: An Experimental Study of the Distribution of Turbulence

Tymiński,

Wolski

2023

Sustainability

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The development of vegetation in riverbeds is an important part of river engineering, and an in-depth understanding of its hydraulic influence is greatly needed. Our research focuses primarily on common reed (Phragmites australis) in riverbeds. To date, little is known about the hydraulic impact of the Phragmites australis reed and both field and laboratory data are still very scarce. Consequently, the main goal of our study was to evaluate the effect of vegetation zones on the spatial distribution of turbulence. Based on laboratory measurements of local instantaneous velocities, the values of the turbulence intensity (degree) Tu were determined, and its spatial distribution was illustrated. Analysis of the results showed that the relatively dense clusters of plants (reeds) act as “openwork deflectors” of the current and very clearly shape its spatial distribution. This can also be observed in the case of the distribution of the turbulence parameter Tu. For example, in the case of the development of riparian vegetation in the form of quasi-triangular communities of common reed (Phragmites australis) located alternately, there is a channelization of the flow, but also spatial changes in its character that occur. This work only presents results for preliminary hydraulic tests for Phragmites reed. These experiments should also be continued for other species of flexible riparian vegetation such as wicker. In the laboratory, the hydraulic influence of only triangle-shaped vegetation zones has been studied. Therefore, there is also a need for further hydraulic studies on vegetation zones of shapes other than triangular, e.g., rectangular, as well as vegetation zones with irregular shapes The authors see the need for such research and have already planned its continuation. Research on the interactions between vegetation and the structure of water flow in the riverbed is a very important aspect of contemporary trends in river environment management. Conscious, planned, and model-tested locating (or removing) of vegetation in a stream allows for shaping hydraulic and morphological conditions, thus controlling the processes of erosion, transport, and accumulation of debris.

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Section: Spatial Distribution Of the V Y Velocity (The Lateral Compon...supporting

confidence: 82%

Hydraulic Effect of Vegetation Zones in Open Channels: An Experimental Study of the Distribution of Turbulence

Tymiński,

Wolski

2023

Sustainability

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“…The implementation of restoration processes is often associated with the introduction of obstructions into the watercourse to increase the diversity of hydraulic conditions, the creation of zones of reduced and increased velocity, the creation of streamside structures, etc. [12,19,23]. As has been shown, different forms of maintenance work carried out can cause variable hydraulic conditions in the riverbed.…”

Section: Resultsmentioning

confidence: 99%

Impact of Maintenance Methods of an Overgrown Lowland River on its Hydraulic Conditions

Wolski

2022

Civil and Environmental Engineering Reports

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The paper presents the results of numerical analyses carried out in the IRIC environment on the Nays2DH hydrodynamic model regarding the impact of plants in the riverbed and watercourse maintenance on hydraulic conditions. The research material was collected for the actual input variant in October 2018 on the Ślęza River in Wrocław. The constructed and calibrated model was reconfigured on basis of the existing vegetation in three possible variants related to river maintenance: W0 variant - leaving the vegetation in the riverbed, W1 variant - removing all vegetation in the riverbed, variant W2 - removing vegetation in the 2.0 m strip from the right bank, W3 - removing of vegetation in a strip of 2.0 m from the bank, alternately on the right and left bank. Hydrological boundary conditions were flows from 0,32 to 5 [m3/s]. For four variants, the dependence of flows on the water table location, maximum and average velocities in the channel, and maximum and average shear stresses in the channel were analysed.

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“…Later, Romali et al presented the application of HEC-RAS model to the development of floodplain maps for an urban area in Segamat town in Malaysia [7]. Ewelina et al analyze in-stream restoration structures impact on hydraulic condition and sedimentation in the Flinta river [8]. Effects of implementing LID practices are also assessed and reviewed.…”

Section: Influence Of External Water Level Of the Han Rivermentioning

confidence: 99%

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

Choo

Park²,

Kim³

2022

Water

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In recent years, the frequency of flooding damage has increased owing to torrential rains caused by abnormal weather and rising sea levels, which can be attributed to global warming. In particular, in the case of low-tide rivers, when a high tide and critical rainfall occur simultaneously, the flood damage will increase due to the increased external water level. The establishment of a disaster prevention plan through a simulation of existing inequality streams may be suitable for general rivers; however, it is inadequate for considering the effects of tide changes over time, such as those in a reduced tide stream. Therefore, in this study, an optimal operation plan is formulated based on unsteady flow simulations in regions where a large number of hydraulic facilities are installed, and an optimal river management plan is derived for the flood season. For the Ara Waterway (Ara Stream) and Gulpo Stream managed by the Korea Water Resources Corporation, various hydraulic facilities (weir, inverted syphon, etc.) are operated in conjunction with the West Sea to mitigate the continuous flood damage. In that context, a West Sea drainage gate has been installed. Correspondingly, it is necessary to optimize the flood exclusion capacity by deriving an optimal operation plan because it directly affects the water level in hydraulic facilities such as the Right No. 1, Left No. 1, and flood gates, which are the most important drainage structures for the Gulpo Stream operation. Herein, through a trial-and-error method, an optimal operation plan is derived to reduce the flood frequency in the Ara Waterway and Gulpo Stream.

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Analysis of in-Stream Restoration Structures Impact on Hydraulic Condition and Sedimentation in the Flinta River, Poland

Cited by 15 publications

References 0 publications

Hydraulic Effect of Vegetation Zones in Open Channels: An Experimental Study of the Distribution of Turbulence

Hydraulic Effect of Vegetation Zones in Open Channels: An Experimental Study of the Distribution of Turbulence

Impact of Maintenance Methods of an Overgrown Lowland River on its Hydraulic Conditions

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

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