The Role of Tropical Cyclone on Changjiang River Subaqueous Delta Geomorphology: A Numerical Investigation of Tropical Cyclone Danas (2019)

Abstract

The geomorphology of river subaqueous deltas is shaped by the combined influence of river discharge (freshwater and sediment), marine processes (tides, wind waves, etc.), and human activities (basin dams, navigation chan-

Turbulence Intermittency Effects on the Initiation Threshold of Sediment Motion in Natural Waters

“…We speculate that this might be due to the functional relationship, as established in laboratory experiments, is primarily relevant to bedload transport (Benavides et al., 2022; Benavides et al., 2023; Liu et al., 2019). However, in field observations, the suspended load transport cannot be disregarded (Sanford et al., 1991; Tang et al., 2023; Wang et al., 2013; Y. Li et al., 2021), especially in estuarine and nearshore areas where suspended sediment concentration and average flow velocity are relatively high, with the average maximum flow velocity at the bottom reaching 0.63 m/s and the maximum SSC reaching 988.19 mg/L (Table S1 in Supporting Information ). Therefore, it is essential to adopt alternative methods that leverage the turbulent intermittency index obtained from field data to accurately determine the critical value.…”