نتایج جستجو برای: morphodynamic

تعداد نتایج: 549  

2012
Jenyffer Vierheller Vieira Carlos Alberto Borzone Luciano Lorenzi Fabiano Grecco de Carvalho

Pollution, exploitation of resources, erosion and recreational activities produce the most common impacts that somehow alter the natural balance of beach ecosystems. The aim of this study was to compare the richness and abundance of the benthic macrofauna of two sectors, one non-urbanized and the other urbanized, on each of two morphodynamically different beaches. Sectors of each beach were ana...

Journal: :The Journal of experimental biology 2004
M C Cerra S Imbrogno D Amelio F Garofalo E Colvee B Tota J M Icardo

The morphodynamic changes occurring during growth were evaluated in the eel (Anguilla anguilla L.) heart. Using an in vitro working heart preparation, cardiac performance of small (body mass 96.76 +/- 27.49 g; mean +/- s.d.) and large (body mass 656 +/- 12 g; mean +/- s.d.) eels was compared under basal conditions and under loading (i.e. preload and afterload) challenges. A parallel morphometri...

2018
Sergio Maldonado Alistair G L Borthwick

We derive a two-layer depth-averaged model of sediment transport and morphological evolution for application to bedload-dominated problems. The near-bed transport region is represented by the lower (bedload) layer which has an arbitrarily constant, vanishing thickness (of approx. 10 times the sediment particle diameter), and whose average sediment concentration is free to vary. Sediment is allo...

2008
Yan Ding Sam S. Y. Wang

By means of the physical process-based modeling approache to computing coastal and estuarine hydrodynamic and morphodynamic processes, an integrated model system was developed to simulate tides, waves, currents, winds, sediment transport, and morphological changes in coastal and estuarine regions. This paper presents an overview of this integrated morphological process modeling system consistin...

2011
M. van der Wegen B. E. Jaffe J. A. Roelvink

[1] This study investigates the possibility of hindcasting‐observed decadal‐scale morphologic change in San Pablo Bay, a subembayment of the San Francisco Estuary, California, USA, by means of a 3‐D numerical model (Delft3D). The hindcast period, 1856–1887, is characterized by upstream hydraulic mining that resulted in a high sediment input to the estuary. The model includes wind waves, salt wa...

Journal: :Environmental Modelling and Software 2016
Lindsay Beevers Ioana Popescu Quan Pan Douglas Pender

The dominant processes of sediment transport and morphological changes are different between rivers and coastal areas. In many situations rivers, estuaries and coasts need to be modelled together in an integrated way. This paper investigates the capability of a freely available, open source, coastal morphodynamic software (XBeach) to estimate sediment transport and morphological changes in fluv...

Journal: :Journal of Geophysical Research: Earth Surface 2018

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