Mekong River system

A summarized history of the Mekong River system in Ben Tre

During the last 100 thousand years, there have been two incidents of sea water flooding all over the delta, according to research documents. The first flood happened 100 thousand years and the second time was 6,000 years ago. In the time between these two periods, the whole region is a solid stretch of land, except the Dong Thap Muoi Marsh.

In time of the second flood, the Mekong stream opened to the sea at a place next to Bay Nui in the Chau Doc region. This river mouth was then immensely wide, and there were enormous alluvial deposit and mud swamp there. The now Bay Nui mounts system were at the time still islands in sea water. After 4,000 more years, through series of whirligig of time, the islands were turned into peninsulas, and at this point of time, the Mekong River was divided into the Tien River and Hau River. It was not until 1,000 years ago that the now Cai Lay and Ben Tre regions were formed. After that, the Tien River branched off into the Vinh Long and My Tho Rivers, then the My Tho River in turn generated the Ham Luong River, and so were the whole system developing into those now known as My Tho, Ba Lai, Ham Luong, and Co Chien Rivers, with Tieu, Dai, Ba Lai, Ham Luong, Co Chien and Cung Hau Estuaries.