Le Xuan Thuyen, Pham Vu Anh, Pham Van Cu, Nguyen Viet Cach, Le Dinh Anh Vu

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As a pioneer ecosystem located at land–water interface in the tropic, there exist always many risks from the seasideto mangroves, especially due to impacts of climate change and sea level rise. Land subsidence is a local problem that can exacerbate the impacts of these geo-hazards. This contribution presents a result of shallow subsidence carried out by using SET-MH technique (developed by the United States Geological Survey) in the core zone of the National Park. The measurement shows the average sedimentation rate of 2.9 cm /yr and the sinking rate of -3.4 cm / yr, since Dec. 30th 2012.

As a simple and low cost method could provide more useful information to help identify the generally sinking trend of coastal areas in the Red River Delta and also to protect its own biosphere reserve.

Keywords: Mangrove, shallow subsidence, SET-MH technique.