Formation and Evolution of Sandy Island in Front of the Thu Bon River Mouth, Quang Nam Province

The main objective of this paper is to investigate the mechanism formation and evolution a river mouth island in front Cua Dai - Vu Gia Thu Bon system. combination coastal morphodynamic analysis with remote sensing, mapping GIS methods has shown that depends on long-term complex interaction between dynamics system littoral, including Cu Lao Cham archipelago. This process three stages: i) bar; ii) mouth; iii) deformation morphology mouth. materials formed are not only carried out by system, but also from longshore sediment due estuary erosion, mainly northern part Dai. Based material factors (river sediments) energy (sea dynamics), bar may follow one two trends: will gradually move closer north shore Dai, erodes over time, then disappear, assuming no major flood wave flow regimes as normal period before 2016; or continue exist change if there an increase climate change, especially extreme events such storms, floods, sea level rise.