An Experimental Study on Impact of Water Levels on the Flow Structure in A River Bend

The Sai Gon River around the Thanh Da peninsula has high potential for eco-tourism. However, bank erosion has been occurring frequently in this area. Dealing with the problem, we have conducted an experimental study to identify the impact of the flow structure of a river bend – one of the causes of bank erosion. The study was aimed at investigating the influence of water levels on the flow structure of the river bend. The hydraulic model of the river bend surrounding the Thanh Da peninsula was built up at a scale of 1:500 in the horizontal direction and 1:100 in the vertical direction. The Froude indicator was approximately 0,1. The water levels were measured by means of a depth gauge. The three-dimensional flow velocity was measured via the ADV (Acoustic Doppler Velocimeter) method. The results concerning three different water levels showed that they did have an impact on the disorder and the distribution of flow velocity