Under the influence of extreme weather,such as typhoons,the estuarine water flux may change strongly in a short time.In this study,the effects of Typhoon 1909"Lekima"on the water flux and split ratio in the Changjiang Estuary are investigated using the FVCOM model.The results show that Typhoon"Lekima"can cause the net landward water flux of the South Passage for more than 30 hours.Au the net water fluxes in the four inlets,i.e.North Branch,North Channel,North Passage and South Passage,show similar decrease-increase-decrease-recovery evolutions under the influence of the typhoon.The total net seaward water flux shows a similar evolution with its magnitude varying by more than 60%.The typhoon generally leads to the increase of net split ratio in the northern branch and the decrease of net split ratio in the southern branch.
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