Searched for: subject%3A%22meander%22
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Kumar, S. (author), Ghosh, Devanita (author), Donselaar, Rick (author), Burgers, F. (author), Ghosh, Ashok Kumar (author)
Shallow aquifers in many Holocene alluvial basins around the world have in the last three decades been identified as arsenic pollution hotspots, in which the spatial variation of natural (or: geogenic) arsenic concentration is conditioned by the meandering-river geomorphology and the fluvial lithofacies distribution. Despite the large amount of...
journal article 2021
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van Til, S.W. (author)
The fairway connecting Holwerd and Nes forms the main transport route between Friesland and Ameland (the Dutch Wadden Sea). It consists of several tidal channels that funnel the majority of the tidal currents propagating through the tidal basin. Over the past decades, several channel bends have expanded leading to a fairway length-increase of...
master thesis 2017
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Molero Jimenez, C. (author), García-Vigueras, Maria (author), Rodríguez-Berral, Raúl (author), Mesa, Francisco (author), Llombart, Nuria (author)
This letter reports an analytical circuit model to characterize periodic arrangements of printed meander lines. The methodology employed for the derivation of the model is presented together with two typical examples of its possible application: A polarizer and an absorber. Comparisons with results provided by a commercial software evidence...
journal article 2017
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Hu, B. (author)
The design of the optimal layout of the wind farm is crucial to minimize the cost of energy produced by the wind farm. This requires an accurate wake model to simulate the wake effect on the annual energy yield of the wind farm. On the other hand, the wake model must be very simple in order to limit the duration of the layout optimisation...
master thesis 2016
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Gentile, V. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author), Scarano, F. (author)
The backflow instability in the wake past a cylindrical blunt-based body in pitch is investigated at a Reynolds number ReD = 6.7 · 104 based on the cylinder diameter. Time-resolved stereoscopic particle image velocimetry measurements have been performed in a cross-flow plane located 0.3 D downstream of the model base. An increasing displacement...
conference paper 2016
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Zervakis, D.I. (author)
All human life is dependent on fresh water and activities related to monitoring its availability have become crucial for financial and survival reasons. Most rivers are being constantly investigated today by both the private and public sector using various means. In advanced countries, the researches cover extensively the riverbed in order to...
master thesis 2015
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Pennekamp, M.F. (author)
Bihar is a densely populated area located in the Middle Ganga Plain (MGP) in India. The Ganges' sinuous nature in the MGP created a vast amount of point bar structures within the floodplain. In 2003 it was discovered that high arsenic concentrations are present in the shallow groundwater aquifers, especially in the elevated point bars. According...
bachelor thesis 2014
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Ottevanger, W. (author), Blanckaert, K. (author), Uijttewaal, W.S.J. (author), De Vriend, H.J. (author)
Reduced-order models remain essential tools for meander modeling, especially for processes at large length scales and long time scales, probabilistic simulations, rapid assessments, or when input data are scarce or uncertain. Present reduced-order meander models consider their dependent variables either as small-amplitude variations compared to...
journal article 2013
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Buitenhuis, L. (author)
De ziekenhuissector heeft de afgelopen decennia een enorme transformatie doorgemaakt. De transformatie is het gevolg van een groot scala aan ontwikkelingen die hebben plaatsgevonden. De mijlpaal binnen de ontwikkelingen ligt in 2006, door de verandering in de wet- en regelgeving. Zo is de oude Wet Ziekenhuisvoorzieningen (WZv) geleidelijk...
master thesis 2012
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Blanckaert, K. (author)
The migration rate of sharp meander bends exhibits large variance and indicates that some sharply curved bends tend to stabilize. These observations remain unexplained. This paper examines three hydrodynamic processes in sharp bends with fixed banks and discusses their morphological implications: secondary flow saturation, outer-banks cells, and...
journal article 2011
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Blanckaert, K. (author), De Vriend, H.J. (author)
Despite the rapid evolution of computational power, simulation of meander dynamics by means of reduced and computationally less expensive models remains practically relevant for investigation of large?scale and long?term processes, probabilistic predictions, or rapid assessments. Existing meander models are invariantly based on the assumptions...
journal article 2010
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Deviese, E.S.J. (author)
Modeling sedimentary heterogeneities of reservoir rocks is typically performed using geostatistical methods. Geostatistics reproduce the spatial distribution of heterogeneities based on available data. There are several geostatistical methods to build 3D reservoir model simulations, such as the object-based or variogram-based methods. MINES...
master thesis 2010
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Duran, R. (author), Beevers, L. (author), Crosato, A. (author), Wright, N. (author)
Lack of data is often considered a limitation when undertaking morphological studies. This research deals with morphological studies of small rivers experiencing bank erosion processes when only limited data are available. A reach of the meandering gravel-bed river Irwell (United Kingdom) is taken as a case study in order to analyze the bank...
conference paper 2010
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Samir-Saleh, M. (author), Crosato, A. (author)
Flume experiments and field observations demonstrating the effects of vegetation on river planforms are reported in literature, but numerical studies of these effects at the river scale are lacking. We investigated the effects of vegetation in a 2D morphodynamic model using submodels for flow resistance and colonisation of newly formed deposits....
conference paper 2010
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Crosato, A. (author), Desta, F.B. (author)
Alternate bars in straight alluvial channels are migrating or steady. The currently accepted view is that they are steady only if the width-to-depth ratio is at the value of resonance or if the bars are forced by a steady local perturbation. Experimental observations, however, seem to indicate that steady bars are also present in cases of...
conference paper 2009
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Blanckaert, K.J.F. (author)
The paper investigates the influence of relative bend curvature on secondary flow, energy losses, and turbulence in sharp open-channel bends. These processes are important in natural streams with respect to sediment transport, the bathymetry and planimetry, mixing and spreading of pollutants, heat, oxygen, nutrients and biological species, and...
journal article 2009
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Crosato, A. (author), Mosselman, E. (author)
The number of bars that form in an alluvial channel cross section can be determined from a physics-based linear model for alluvial bed topography. The classical approach defines separators between ranges in which river planform styles with certain numbers of bars are linearly stable and linearly unstable. We propose an alternative method that is...
journal article 2009
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Crosato, A. (author)
This thesis examines the morphological changes of non-tidal meandering rivers at the spatial scale of several meanders. With this purpose, a physics-based mathematical model, MIANDRAS, has been developed for the simulation of the medium-term to long-term evolution of meandering rivers. Application to several real rivers shows that MIANDRAS can...
doctoral thesis 2008
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Poort, M.C.L. (author)
Detailed laboratory measurements of the wave and current field induced by bi-chromatic waves incident on an artificial surfing reef are presented. Strong wave focussing occurs on the surfing reef. Both PTV and in-situ measurements are reported that show the presence of a strong rip current flowing oblique off-shore. Observed water level set-up...
master thesis 2007
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Crosato, A. (author)
Meander migration models include an as yet poorly investigated source of numerical errors related to the computation of the channel curvature, which are amplified by the procedure of adding and deleting grid points as the river planform evolves. The methods adopted to reduce these errors may influence size, form, and migration rate of the...
journal article 2007
Searched for: subject%3A%22meander%22
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