Abstract
In the reach from Jieshou to Ducheng of the Xijiang River, the flow and sediment conditions are complex, the shallows are linked together and the rocks are densely covered. With the promotion of waterway classification, the navigation-obstructing phenomenon appears in some shoal reaches due to insufficient depth. There are some safety hazards for ship navigation due to the distribution of rocks in channel or on both sides of channel. Based on the navigation-obstructing characteristic, the channel regulation principles mainly in dredging and rock blasting and secondly by damming were put forward. And according to the concrete condition of different shallow reaches, different channel regulation methods were proposed. By fixed and movable bed physical model test, the variations of the water level along the reach and the velocity in channel before and after different engineering plans were studied. The results show that the dredged channel will be stable and the water depth in channel will meet the demands of design depth after the recommended plan implementation.
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