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Eliisa Lotsari, Michael Dietze, Maria Kämäri, Petteri Alho and Elina Kasvi
Macro-turbulent flows (i.e., coherent flow structures reaching through the whole water column), have not been studied widely in northern seasonally frozen rivers during both open-channel and ice-covered flow conditions. Thus, we aim: (1) to detect and co...
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Jaan Hui Pu, Jiahua Wei and Yuefei Huang
To reproduce the natural flow topography in a laboratory environment, it is crucial to recapture its bed condition in order to ensure the accurate representation. Water-worked bed represents a state-of-the-art experimentally formed bed to imitate the nat...
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Jaan Hui Pu, Jiahua Wei, Yuefei Huang
Pág. 1 - 13
To reproduce the natural flow topography in a laboratory environment, it is crucial to recapture its bed condition in order to ensure the accurate representation. Water-worked bed represents a state-of-the-art experimentally formed bed to imitate the nat...
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Vera M. van Bergeijk, Jord J. Warmink and Suzanne J. M. H. Hulscher
The wave overtopping flow can exert high hydraulic loads on the grass cover of dikes leading to failure of the cover layer on the crest and the landward slope. Hydraulic variables such as the near bed velocity, pressure, shear stress and normal stress ar...
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Jaan H. Pu
The failure of swirling ship propellers in marine environments can lead to huge repair costs. One of the main causes of such failure is when propellers tangle with vegetation, especially in shallow flow environments like ports, harbours, or shipyards. In...
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Yi Xu, Manousos Valyrakis, Gordon Gilja, Panagiotis Michalis, Oral Yagci and Lukasz Przyborowski
A few decades ago, river erosion protective approaches were widely implemented, such as straightening the river course, enhancing riverbed/bank stability with layers of concrete or riprap, and increasing channel conveyance capacity (i.e., overwidening). ...
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Julia Hopkins, Matthieu de Schipper, Meagan Wengrove and Bruno Castelle
Observations from wave basin experiments and wave-resolving numerical simulations demonstrate the effect of wave-current interaction on shear stress around a sandy mound. Observations from the wave basin show that the mound deformation rate and morpholog...
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Thorsten Stoesser, Richard McSherry and Bruno Fraga
Large-eddy simulations (LES) of the flow over a non-uniformly roughened channel bed are carried out to study the effect of non-uniform bed roughness on turbulence driven secondary currents and turbulence statistics. The channel bed is comprised of altern...
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Seung Oh Lee and Seung Ho Hong
Bridge pier scour is one of the main causes of bridge failure and a major factor that contributes to the total construction and maintenance costs of bridge. Recently, because of unexpected high water during extreme hydrologic events, the resilience and s...
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Sanaz Hadian, Hossein Afzalimehr and Jueyi Sui
This experimental study aims to investigate the characteristics of turbulent flow in channels with vegetated banks and varying channel width under the condition of the incipient motion of bed material. The natural reeds were used as emergent vegetation o...
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Cheng-Kai Chang, Jau-Yau Lu, Shi-Yan Lu, Zhong-Xiang Wang and Dong-Sin Shih
This study discusses the mechanism for the occurrence of equilibrium and non-equilibrium scour holes. By using a particle image velocimetry (PIV) measurement system, it measures the turbulent flow fields in an open channel moving through the rough bed be...
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Zaiyang Zhou, Jianzhong Ge, Dirk Sebastiaan van Maren, Jinghua Gu, Pingxing Ding and Zhengbing Wang
The Krone?Partheniades (K-P) framework has been used for decades to quantify and analyze the sediment exchange at a water?bed interface. Measuring the erosion and deposition parameters that are part of this framework requires time-consuming field observa...
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Marcio Boechat Albernaz, Gerben Ruessink, H. R. A. (Bert) Jagers and Maarten G. Kleinhans
Sandy coasts evolve as a result of sand transport by waves and tides. Wave-generated flows near the seabed stir the sand into the water column, which can subsequently be transported in cross-shore and alongshore directions. As waves move shoreward into s...
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Gábor Fleit, Sándor Baranya, Nils Rüther, Hans Bihs, Tamás Krámer, János Józsa
Pág. 1 - 21
Waves induced by ship movement might be harmful for the habitat in the littoral zone of rivers due to the temporally increasing bed shear stress, the high-energy breaking waves and the consequently related detachment of benthic animals. In order to under...
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Gábor Fleit, Sándor Baranya, Nils Rüther, Hans Bihs, Tamás Krámer and János Józsa
Waves induced by ship movement might be harmful for the habitat in the littoral zone of rivers due to the temporally increasing bed shear stress, the high-energy breaking waves and the consequently related detachment of benthic animals. In order to under...
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Jae-Soon Jeong, Seung-Buhm Woo, Han Soo Lee, Bon-Ho Gu, Jong Wook Kim and Jin Il Song
This study investigated the flow patterns and affecting factors in the North Port of Incheon, South Korea, to understand the inner-port circulation characteristics by applying an unstructured grid finite volume community ocean model (FVCOM) together with...
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Marc de Vos, Marcello Vichi and Christo Rautenbach
A coupled numerical hydrodynamic model is presented for the Cape Peninsula region of South Africa. The model is intended to support a range of interdisciplinary coastal management and research applications, given the multifaceted socio-economic and ecolo...
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Sonja Eichentopf, Joep van der Zanden, Iván Cáceres and José M. Alsina
The evolution of different initial beach profiles towards the same final beach configuration is investigated based on large-scale experimental data. The same wave condition was performed three times, each time starting from a different initial profile mo...
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Yasha Hetzel, Charitha Pattiaratchi and Hrvoje Mihanovic
In Shark Bay, a large hypersaline bay in Western Australia, longitudinal density gradients force gravitational circulation that is important for Bay-ocean exchange. First-time observations of vertical stratification and velocity are presented, confirming...
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Alistair Grinham, Nathaniel Deering, Paul Fisher, Badin Gibbes, Remo Cossu, Michael Linde and Simon Albert
Rates of fluvial sediment discharge are notoriously difficult to quantify, particularly during major flood events. Measurements are typically undertaken using event stations requiring large capital investment, and the high cost tends to reduce the spatia...
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