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Coastal responses and shoreline restoration after Holocene sea-level changes in Hong Kong, China
Published in Guojun Hong, Gongxun Liu, Liquan Xie, Hydraulic Engineering V, 2018
Y.Y. Sun, J. Xing, Y.Q. Zong, G.J. Hong
From the early to mid-Holocene, Mai Po had been regarded as a subtidal area under deep water and having significant tidal water exchange with the ocean. This environmental condition facilitated the growth of marine shells on the mudflats. This implies that in the past, Mai Po was possibly connected to the ocean not only through the Deep Bay, but also through the low-lying channel of Teun Mun.Over the past 100 years, the most significant coastal change in Mai Po has been the expansion of the mangrove forest. The mangrove front was located at the current border fence in the 1960s. The front might have expanded seaward and reached the lower part of the mangrove forest by the 1980s.High sedimentation rate has been recorded for the past 50 years, which is possibly due to human activities such as industrialization and urbanization in Hong Kong and Shenzhen, which may have increased the sediment yield. Over the past decades, sea-level rise has generated additional accommodation space, which has also led to rapid sedimentation.
Holocene infill of the Anglesea Estuary, Victoria: a keep-up estuary in a geologically constrained environment
Published in Australian Journal of Earth Sciences, 2021
D. M. Kennedy, V. N. L. Wong, G. E. Jacobsen
On wave-dominated coasts, the broad (catchment-scale) estuarine type will be firstly determined by the underlying geology (Cooper et al., 2018; Kennedy, 2011; Roy et al., 1994). This determines the available accommodation space for infill within the estuarine basin as well as the sediment transport pathways during sea-level transgressions. A shallow shelf will facilitate landward movement of sand as sea-level rises facilitating beach–barrier development and therefore the formation of barrier-type estuaries. Where the shelf is steeper and net sediment flux is offshore, ria-type forms will occur (Roy et al., 1994).