Thin Thin Soe

Toe Toe Aung

Sustainable for Navigation Improvement in Yangon River


Sedimentation in rivers and estuaries is a common problem for maintenance of waterways. The river fresh water and daily or twice-daily reversing flows due to tidal action make flows in estuaries and tidal section of rivers complex. The present study area, the Yangon River which is on an eastern branch of Ayeyarwaddy River. The Ayeyarwaddy River is the fifth largest in the world in terms of sediment discharge, depositing more than 360 million tons of sediment annually into the continental shelf in the northern Andaman Sea. Yangon River is the most important river to Myanmar for 90% of its international marine trades are transported through this channel. The distance between the Yangon Port and the river mouth is about 45 kilometers and the width of it in the region is from 2 kilometers to 7 kilometers. Active sediment transport due to river flows and tidal currents causes major shallow water areas called “Inner Bar” located inside the river near Yangon Port. Dredging works are required to maintain depth of the channel at these areas. Despite knowledge gathered on the Yangon River and Estuary system, little information is currently available on the behavior of sediment transport caused by the river flow and the tidal currents. Therefore it is difficult to take effective measures for sedimentation other than dredging. The dredging cost made the problem for the navigation channel.

Not only the cost but also the environmental impacts due to dredging everyday near the Inner Bar area, my study intended to find possible way to reduce the sedimentation near that area to get the sustainable development in navigation.

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