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Journal of Korean Society of Coastal and Ocean Engineers > Volume 31(6); 2019 > Article
J Korean Soc Coast Ocean Eng 2019;31(6): 450-457. doi: https://doi.org/10.9765/KSCOE.2019.31.6.450
양곤강 퇴적물 이동 및 장기 하상변화율 측정
살라잉샤인텟1,2, 장연식1,2
1Ocean Science, University of Science and Technology
2Korea Institute of Ocean Science and Technology
Estimation of Sediment Transport and Long-term Prediction of Riverbed Elevation Changes in Yangon River
Salaing Shine Htet1,2, Yeon S. Chang1,2
1Ocean Science, University of Science and Technology
2Coastal Development and Ocean Energy Research center, Korea Institute of Ocean Science and Technology, Haeyang-ro, Yeongdo-gu, Busan 49111, Korea
Corresponding author: Yeon S. Chang ,Tel: +82-51-664-3566, Email: yeonschang@kiost.ac.kr
Received: November 18, 2019;  Revised: December 19, 2019.  Accepted: December 23, 2019.
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Sedimentation is a common problem for river ports. But its intensity depends on the rate of sedimentation, channel shape and size, hydrodynamic behavior of the river and the importance of the port. High sedimentation rate in Yangon River has become one major issue for Myanmar as her largest port is located on the Yangon riverbank. As a result of the high sedimentation rate, shallow water area near the confluence of Yangon River, Pazundaung Creek, and Bago River keeps blocking the navigation channel to the Yangon Port, which also limits the size of vessel calling to Yangon Port. Therefore, studies to understand sediment transport process in Yangon River are required because the economic development of Myanmar highly relies on the Yangon Port. This paper aims to calculate the sediment transport and to predict the riverbed elevation changes in Yangon River by using Bagnold (1966) theory. Calculation result shows that huge difference can be found in the bed load transport between the rainy season and dry season in Yangon River, and thus the sedimentation problem would become more severe in the dry season when the transported sediments are reduced. The estimated sedimentation rate in dry season indicates that the rate of riverbed level rise near the Yangon Port area is about 0.063 m per year, which would lead to approximately 3.15 m rise in the riverbed level in next 50 yrs, considering the same workload of dredging to maintain the navigation channel.
Keywords: Yangon River, sedimentation, bed load transport, Myanmar
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