An Improved Design of Excluding Sediment into River Intake Structures

by Wu-Sung Ke, Sinotech Engineering Consultants, Inc, Taipei, Taiwan,
Sue-Jen Wu, Sinotech Engineering Consultants, Inc, Taipei, Taiwan,
Che-Yuan Huang, Sinotech Engineering Consultants, Inc, Taipei, Taiwan,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The function of excluding sediment into river intake structures is usually achieved by the device of sluice ways. Although many sluice ways have been constructed and many formulas are available for them, it is still difficult to find a general rule from these projects. Hence, this study attempts to obtain some general criteria in order to be helpful for the future projects. The commonly applied concepts were initially adopted in a low head dam which has low intake elevation and high sediment load. The hydraulic model test indicated that the original design was not acceptable due to the lack of sediment flushing capacity. A new sluice way layout was suggested together with flow simulation and hydraulic model test. Results of the model test showed that the new layout has supercritical flow condition with sufficient velocity to flush sediment, which is also confirmed by the flow calculation. An improved design concept is therefore presented in this study.

Subject Headings: Water intakes | Hydraulic models | Sediment | Hydraulic design | Flow simulation | Rivers and streams | Hydraulic structures

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