NGA TRA NGUYEN QUYNH (1) , CHINH LIEOU KIEN (1) , KIM TRAN THI (2) , BAY NGUYEN THI (1); PHUNG NGUYEN KY (3)
(1) University of Technology, HCMC, Vietnam
lieoukienchinh@gmail.com , ntbay@hcmut.edu.vn
(2) University of Natural Resources Environment, HCMC, Vietnam
(3) Department of Science and Technology, HCMC, Vietnam,
lieoukienchinh@gmail.com , ntbay@hcmut.edu.vn
(2) University of Natural Resources Environment, HCMC, Vietnam
(3) Department of Science and Technology, HCMC, Vietnam,
ABSTRACT
The paper presents the application of the numerical models used to calculate the riverbank failure in Tien River, which flows through Long Ho district of Vinh Long province. The two-dimensional (2D) model is based on the system of non- linear equations including Reynolds equations, sediment transport, and bed load continuity equation to simulate the flow, sediment transport and bed changes in the river. Then the model is combined with Geo-slope model in order to calculate
the probability of riverbank failure. The obtained results show that the stability of riverbank at this segment is low and potential to failure. Besides, the result of bank width retreat is compared with some observed data and received a good agreement. In conclusion, these results indicate that the approach in this study is promising and potentially applied in predicting and avoiding bank erosion in Vietnam river networks.
The paper presents the application of the numerical models used to calculate the riverbank failure in Tien River, which flows through Long Ho district of Vinh Long province. The two-dimensional (2D) model is based on the system of non- linear equations including Reynolds equations, sediment transport, and bed load continuity equation to simulate the flow, sediment transport and bed changes in the river. Then the model is combined with Geo-slope model in order to calculate
the probability of riverbank failure. The obtained results show that the stability of riverbank at this segment is low and potential to failure. Besides, the result of bank width retreat is compared with some observed data and received a good agreement. In conclusion, these results indicate that the approach in this study is promising and potentially applied in predicting and avoiding bank erosion in Vietnam river networks.
Keywords: Bank erosion, Factor of Safety, GEO-Slope, Numerical model