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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : Estuarine mangrove squeeze in the mekong delta
Estuarine mangrove squeeze in the mekong delta
In the Mekong Delta Estuaries (MDES), due to the continuously increasing extension of local agriculture and fish farming
in many regions, mangroves have degraded into a very narrow strip of sometimes less than 50 m in width. River banks
at those locations are often suffering from erosion and are unstable. Many efforts have been undertaken to protect the
river banks as well as to maintain the mangrove forests, but until now very limited results have been achieved. The
erosion trend is anticipated to continuously increase in the near future. The threat to the existence of the coastal
mangroves or tidal wetland habitats caused by the compound impacts of the human-induced and sea-level rise induced
is increasingly recognized as term ¡°squeeze¡±. While the ¡°squeeze¡± issue for coasts has been increasingly recognized, the
similarity for mangroves in estuary area is less well acknowledged. The difference is that while the main hydrodynamic
forces effect on mangroves at coastal area are waves, mangroves in estuaries mainly affected by the flow, i.e. flow from
tidal action and flow from river discharge. This implies a similarity with the hydrodynamics of floodplain vegetated
channels. By analyzing the data from literature and from satellite images together with the application of the rigid 3D
Vegetation in Delft3D-FLOW, the impacts of local fish-farming construction on the hydrodynamic of riverine mangrove
forest in MDES is being studied. Results reveal a critical width required for the stable development of the riverine
mangrove forest in MDES. Besides, flow penetration from the main channel into the mangrove regions play an important
role and cannot be neglected in understanding the behaviors of riverine mangrove towards changes in landward
boundary conditions.
File Size : 515,158 bytes
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 28/08/2015
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