Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure

Abstract Short-term bed-level dynamics has been identified as one of the main factors affecting biota establishment or retreat on tidal flats. However, due to a lack of proper instruments and intensive labour involved, the pattern and drivers of daily bed-level dynamics are largely unexplored in a s...

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Autores principales:	Zhan Hu, Peng Yao, Daphne van der Wal, Tjeerd J. Bouma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c3e0a76151ab4611b12a85059ea926db
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spelling	oai:doaj.org-article:c3e0a76151ab4611b12a85059ea926db2021-12-02T11:52:39ZPatterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure10.1038/s41598-017-07515-y2045-2322https://doaj.org/article/c3e0a76151ab4611b12a85059ea926db2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07515-yhttps://doaj.org/toc/2045-2322Abstract Short-term bed-level dynamics has been identified as one of the main factors affecting biota establishment or retreat on tidal flats. However, due to a lack of proper instruments and intensive labour involved, the pattern and drivers of daily bed-level dynamics are largely unexplored in a spatiotemporal context. In this study, 12 newly-developed automatic bed-level sensors were deployed for nearly 15 months on two tidal flats with contrasting wave exposure, proving an unique dataset of daily bed-level changes and hydrodynamic forcing. By analysing the data, we show that (1) a general steepening trend exists on both tidal flats, even with contrasting wave exposure and different bed sediment grain size; (2) daily morphodynamics level increases towards the sea; (3) tidal forcing sets the general morphological evolution pattern at both sites; (4) wave forcing induces short-term bed-level fluctuations at the wave-exposed site, but similar effect is not seen at the sheltered site with smaller waves; (5) storms provoke aggravated erosion, but the impact is conditioned by tidal levels. This study provides insights in the pattern and drivers of daily intertidal bed-level dynamics, thereby setting a template for future high-resolution field monitoring programmes and inviting in-depth morphodynamic modelling for improved understanding and predictive capability.Zhan HuPeng YaoDaphne van der WalTjeerd J. BoumaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhan Hu Peng Yao Daphne van der Wal Tjeerd J. Bouma Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
description	Abstract Short-term bed-level dynamics has been identified as one of the main factors affecting biota establishment or retreat on tidal flats. However, due to a lack of proper instruments and intensive labour involved, the pattern and drivers of daily bed-level dynamics are largely unexplored in a spatiotemporal context. In this study, 12 newly-developed automatic bed-level sensors were deployed for nearly 15 months on two tidal flats with contrasting wave exposure, proving an unique dataset of daily bed-level changes and hydrodynamic forcing. By analysing the data, we show that (1) a general steepening trend exists on both tidal flats, even with contrasting wave exposure and different bed sediment grain size; (2) daily morphodynamics level increases towards the sea; (3) tidal forcing sets the general morphological evolution pattern at both sites; (4) wave forcing induces short-term bed-level fluctuations at the wave-exposed site, but similar effect is not seen at the sheltered site with smaller waves; (5) storms provoke aggravated erosion, but the impact is conditioned by tidal levels. This study provides insights in the pattern and drivers of daily intertidal bed-level dynamics, thereby setting a template for future high-resolution field monitoring programmes and inviting in-depth morphodynamic modelling for improved understanding and predictive capability.
format	article
author	Zhan Hu Peng Yao Daphne van der Wal Tjeerd J. Bouma
author_facet	Zhan Hu Peng Yao Daphne van der Wal Tjeerd J. Bouma
author_sort	Zhan Hu
title	Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
title_short	Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
title_full	Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
title_fullStr	Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
title_full_unstemmed	Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
title_sort	patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c3e0a76151ab4611b12a85059ea926db
work_keys_str_mv	AT zhanhu patternsanddriversofdailybedleveldynamicsontwotidalflatswithcontrastingwaveexposure AT pengyao patternsanddriversofdailybedleveldynamicsontwotidalflatswithcontrastingwaveexposure AT daphnevanderwal patternsanddriversofdailybedleveldynamicsontwotidalflatswithcontrastingwaveexposure AT tjeerdjbouma patternsanddriversofdailybedleveldynamicsontwotidalflatswithcontrastingwaveexposure
_version_	1718395008988479488

Patterns and drivers of daily bed-level dynamics on two tidal flats with contrasting wave exposure

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