Assessing the Impact of Inundation Preventing Construction on River Morphology of Can Giuoc River in Long An Province

International science and technology conference "Earth science"

Nguyet, L.M.^1 ; Kandasamy, Jaya^2 ; Minh, D.Q.^3

Thuy Loi University, 175 Tay Son street, Hanoi

10000, Viet Nam^1

UTS-HCMUT Joint Technology and Innovation Research Centre, Broadway, Sydney

NSW

2007, Australia^2

Ministry of Agriculture and Rural Development, Hanoi

10000, Viet Nam^3

关键词: Mike 21 models;    Reinforcement measures;    River bank;    River morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022221/pdf
DOI  :  10.1088/1755-1315/272/2/022221

来源: IOP

【 摘 要 】

To attend to inundation prevention in Ho Chi Minh city, the Prime Minister approved the irrigation plan to prevent inundation in which there is a solution of constructing Thu Bo tidal drainage in Long An province. Thu Bo drainage is expected to have a total width of 200m, including 120m with drainage threshold -8m and 80m with drainage threshold -4,0m. Thu Bo drainage will be constructed on Can Giuoc River which is a national waterway that has been planned (two level 3 waterways from Ho Chi Minh city to Kien Luong and to Ca Mau). The article presents the result of MIKE 21 model study to assess the impact of inundation preventing construction on river morphology of Can Giuoc River in Long An province. The result indicates that the location of the drainage has caused local erosion due to narrow riverbed, flow velocity here increases, hence there are erosions in front of and behind the drainage. The sphere of erosion influence causes riverbed modification towards the upstream and downstream about 180 - 200m, especially in the time of drainage operation, there are significant differences between the upstream and downstream water level, which causes local erosion, therefore it is essential to have riverbed and river bank strengthening reinforcement measures to stabilize riverbed.