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Preprints
https://doi.org/10.5194/essd-2020-78
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2020-78
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  04 Jun 2020

04 Jun 2020

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This preprint is currently under review for the journal ESSD.

High resolution bed level change and synchronized biophysical data from 10 tidal flats in northwestern Europe

Zhan Hu1,2, Pim W. J. M. Willemsen3,4, Bas W. Borsje3, Chen Wang5, Heng Wang2,6, Daphne van der Wal4,7, Zhenchang Zhu8, Bas Oteman4, Vincent Vuik9,10, Ben Evans11, Iris Möller12, Jean-Philippe Belliard13, Alexander Van Braeckel14, Stijn Temmerman13, and Tjeerd J. Bouma4,15 Zhan Hu et al.
  • 1Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, and School of Marine Science, Sun Yat-sen University, Guangzhou, 510275, China
  • 2Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), China
  • 3Water Engineering and Management, University of Twente, Enschede, P.O. Box 217, 7500 AE, the Netherlands
  • 4NIOZ Royal Netherlands Institute for Sea Research, Department of Estuarine and Delta Systems and Utrecht University, Yerseke, P.O. Box 140, 4400 AC, the Netherlands
  • 5Satellite Application Center for Ecology and Environment, Ministry of Ecology and Environment, and State Environmental Protection Key Laboratory of Satellite Remote Sensing, Beijing, 100094, China
  • 6School of Marine Engineering and Technology, Sun Yat-Sen University, Guangzhou, 510275, China
  • 7Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, P.O. Box 217, 7500 AE, the Netherlands
  • 8Institute of Environmental and Ecological engineering, Guangdong University of Technology, 510030 Guangzhou, China
  • 9Delft University of Technology, Faculty of Civil Engineering and Geosciences, P.O. Box 5048, 2600 GA, Delft, the Netherlands
  • 10HKV Consultants, P.O. Box 2120, 8203 AC, Lelystad, the Netherlands
  • 11Department of Geography, University of Cambridge, Cambridge, CB2 3EN, UK
  • 12Department of Geography, Trinity College Dublin, Dublin 2, D02 PN40, Ireland
  • 13University of Antwerp, Ecosystem Management Research Group, Antwerp, 2610 Belgium
  • 14Research Institute for Nature and Forest (INBO), Havenlaan 88, 1000 Brussels, Belgium
  • 15Department of Physical Geography, Utrecht University, Utrecht, P.O. Box 80.115, 3508 TC, the Netherlands

Abstract. Tidal flats provide valuable ecosystem services such as flood protection and carbon sequestration. Erosion and accretion processes govern the eco-geomorphic evolution of intertidal ecosystems (marshes and bare flats), and hence substantially affect their valuable ecosystem services. To understand the intertidal ecosystem development, high-frequency bed-level change data are thus needed. However, such datasets are scarce due to the lack of suitable methods that do not involve excessive labour and/or instrument cost. By applying newly-developed Surface Elevation Dynamics sensors (SED-sensors), we obtained unique high-resolution daily bed-level change data sets in the period 2013–2017 from 10 salt marsh sites situated in the Netherlands, Belgium and Britain in contrasting physical and biological settings. At each site, multiple sensors were deployed for 9–20 months to ensure sufficient spatial and temporal coverage of highly variable bed level change processes. The bed level change data are provided with synchronized hydrodynamic data, i.e. water level, wave height, tidal current velocity, and medium grain size (D50) as well as (for some sites) chlorophyll-a level and organic matter content of the surface sediment. This dataset has revealed diverse spatial morphodynamic patterns over daily to seasonal scales, which are valuable to theoretical and model development. On the daily scale, this dataset is particularly instructive as it includes a number of storm events, the response to which can be detected in the bed level change observations. Such data are rare but useful to study tidal flat response to highly energetic conditions.

The dataset is available from the 4TU.Centre for Research Data (https://doi.org/10.4121/uuid:4830dbc2-84b8-46f9-99a3- 90f01ab5b923, Hu et al., 2020), which is expected to expand with additional SED-sensor data from ongoing and planned surveys.

Zhan Hu et al.

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High resolution bed level change and synchronized biophysical data from 10 tidal flats in northwestern Europe Z. Hu, P. W. J. M. Willemsen, B. W. Borsje, C. Wang, H. Wang, D. van der Wal, Z. Zhu, B. Oteman, V. Vuik, B. Evans, I. Möller, J.-P. Belliard, A. Van Braeckel, S. Temmerman, and T. J. Bouma https://doi.org/10.4121/uuid:4830dbc2-84b8-46f9-99a3-90f01ab5b923

Zhan Hu et al.

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Short summary
Erosion and accretion processes govern the eco-geomorphic evolution of intertidal ecosystems (marshes and bare flats), and hence substantially affect their valuable ecosystem services. By applying a novel sensor, we obtained unique high-resolution daily bed-level change data sets from 10 salt marsh sites in northwestern Europe. This dataset has revealed diverse spatial bed-level change patterns over daily to seasonal scales, which are valuable to theoretical and model development.
Erosion and accretion processes govern the eco-geomorphic evolution of intertidal ecosystems...
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