The main purpose of this project is to verify the numerical model by means of the comparison with the physical model experimental data. The physical model was tested on Dajia River bed for the downstream of the Shin-Kang Dam with a 1:80 scale ratio to field.
The physical model of the Dajia River in the region between the Old Railway Bridge and the bridge of National Highway No.1 was built to verify the riverbed stabilization measures in this region(as shown in Figure 1).
Figure.1 Map of physical model of the Dajia River in the reach between the Old Railway Bridge and the National Expressway No.1 Bridge in 2011
The physical model was tested by discharge hydrograph with 4,007 m3/s at the peak (as shown in Figure 2 & Figure 3). The experimental results showed that the Stabilization case must broaden the width of the deep groove of the river between the upstream of New Railway Bridge and the downstream of Houfeng Bridge at left side riverbank. This case can reduce unit discharge and velocity of the flow, but have to watch out the scouring depth on downstream of New Railway Bridge and Houfeng Bridge.
Figure.2 The physical model of the Dajia River in the region between the Old Railway Bridge and the bridge of National Highway No.1 before test.
Figure.3 The physical model of the Dajia River in the region between Old Railway Bridge and the bridge of National Highway No.1 after test.