Tidal Flat Morphodynamics of the Changjiang Estuary

Dai, Zhicong

doi:10.1007/978-981-16-3771-1_5

Cited by 1 publication

(1 citation statement)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coastal vegetation plays an important role in sedimentation processes [45]. To explain the dramatic accretion (Figures 9A, 10B and 12A,B) that occurred from 2016 to 2017, the normalized difference vegetation index (NDVI) values in the central supratidal zone (based on the year 2020) were calculated via the algorithm provided in the Google Earth engine.…”

Section: What Are the Dominant Factors That Control The Variability?mentioning

confidence: 99%

Mapping Morphodynamic Variabilities of a Meso-Tidal Flat in Shanghai Based on Satellite-Derived Data

et al. 2022

View full text Add to dashboard Cite

Morphodynamic variabilities of tidal flats (e.g., the variations of pattern, area, and topography) are a key issue in the management of coastal intertidal zones. In this study, the morphodynamic variabilities of the Lin-gang (Shanghai) tidal flat were investigated using waterlines extracted from multi-source satellite images acquired from 2013 to 2020. The waterlines were evaluated against in situ measurements. The results of our investigation indicated that the tidal flat was in a state of rapid accretion from 2015 to 2018, and in a state of erosion from 2018 to 2020. We found that the accretion of the tidal flat was most likely due to the protection of local vegetation, which prevents the sea bottom from eroding. However, storms have primarily been causing erosion since 2018. The potential mechanisms of the geomorphological variations were further analyzed using the empirical orthogonal function (EOF) method. The analysis revealed that the variation in the tidal flat was dominated by two modes. The first mode accounted for 55% of the variation, while the second mode accounted for 18%. The spatial distribution of the first mode was highly related to the artificial vegetation, indicating that the local variations in the vegetation prevented the sea bottom from eroding, which was dominant in the accretional phase from 2015 to 2018. The second model reflected the extreme meteorological events that resulted in potential changes in the tidal flat’s pattern (i.e., transitioning to an erosion phase from 2018 to 2020). The satellite-derived topographies were demonstrated to be an effective means of mapping the evolution of a meso-tidal flat.

show abstract

Section: What Are the Dominant Factors That Control The Variability?mentioning

confidence: 99%