Morphodynamic signatures derived from daily surface elevation dynamics can explain the morphodynamic development of tidal flats

作     者：Tim J.Grandjean Jaco C.de Smit Jim van Belzen Gregory S.Fivash Jeroen van Dalen Tom Ysebaert Tjeerd J.Bouma Tim J.Grandjean;Jaco C.de Smit;Jim van Belzen;Gregory S.Fivash;Jeroen van Dalen;Tom Ysebaert;Tjeerd J.Bouma

作者机构：Department of Estuarine and Delta SystemsRoyal Netherlands Institute for Sea Research(NIOZ)4401 NT YersekeThe Netherlands Faculty of GeosciencesDepartment of Physical GeographyUtrecht University3508 TC UtrechtThe Netherlands 

出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)

年 卷 期：2023年第16卷第1期

页      面：14-25页

核心收录：

学科分类：0707[理学-海洋科学] 08[工学] 0815[工学-水利工程] 081502[工学-水力学及河流动力学] 0824[工学-船舶与海洋工程] 

基　　金：supported by the Royal Netherlands Academy of Arts and Sciences(KNAW)(Grant No.PSA-SA-E-02) the Province of Zeeland,the Netherlands(Grant No.CoE-Buitendijks) 

主　　题：Surface elevation dynamics Tidal flat trajectories Morphodynamic development Morphodynamic signature Bed level dynamics 

摘      要：Understanding the sensitivity of tidal flats to environmental changes is ***,most studies rely on process-based models to systematically explain the morphodynamic evolution of tidal *** this study,we proposed an alternative empirical approach to explore tidal flat dynamics using statistical indices based on long-term time series of daily surface elevation *** elevation dynamic(SED)indices focus on the magnitude and period of surface elevation changes,while morphodynamic signature(MDS)indices relate sediment dynamics to environmental *** statistical analyses were applied to an intervention site in the Netherlands to determine the effect of recently constructed groynes on the tidal *** these analyses,we were able to(1)detect a reduction in the daily SED and(2)determine that the changes in the daily SED were predominantly caused by the reduction in wave impact between the groynes rather than the reduction in tidal ***,the presented results showed that the combination of novel statistical indices provides new insights into the trajectories of tidal flats,ecosystem functioning,and sensitivity to physical drivers(wind and tides).Finally,we suggested how the SED and MDS indices may help to explore the future trajectories and climate resilience of intertidal habitats.