Processes and factors controlling and affecting the retreat of mangrove shorelines in South Vietnam
Mangrove coasts are under eroding in some areas. The processes that control the erosion have not been studied yet. This study was carried-out at two mangrove cliff shorelines in South Vietnam to answer this question. At both sites, the erosion is affected by both the duration of tidal inundation and wave energy input. The most dominant factor is the duration of tidal inundation, which usually lasts longer during neap tide. Especially, the erosion is higher during neap tide. As well, tidal current, in particular strong asymmetry and speed, can influence the erosion. Higher shear strength of the cliff soil can reduce the erosion rate. Without mangroves, the erosion will accelerate.