Period 1988 - 1996: overall, this was a period with less volatility shoreline most, except the special position as head Long Island inaugurated, mudflat at Long Phuoc Hamlet and the South Branch sandbar islands , head islet erosion processes occur.
- Stage 1996 - 2006: at this stage very strong fluctuations occur, riverside area of Thoi Tien Thuong Commune was prolonged accretion sizable acreage increase . At the isles Long Khanh continued erosion with more severity. To the north isles branch, mudflats at Long Phuoc Hamlet continue increasing the area, also in this period, there has appeared a large sand bank. South Side branch, sand banks has shrunk even area sandbars disappeared completely.
- Period 2006 - 2015: at the beginning of the isle continues the process of erosion. To the north isles branch, mudflats have become part of the isle of Cha Va, sandbars here to change the location. Khanh Nam Long Island branch was no longer the appearance of the isles.
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