• 全国中文核心期刊
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ZHANG Guang-hui. Study on hydraulic properties of shallow flow[J]. Advances in Water Science, 2002, 13(2): 159-165.
Citation: ZHANG Guang-hui. Study on hydraulic properties of shallow flow[J]. Advances in Water Science, 2002, 13(2): 159-165.

Study on hydraulic properties of shallow flow

Funds: The project is supported by National Natural Science Fund of China(No.40001014).
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  • Received Date: December 07, 2000
  • Revised Date: May 21, 2001
  • The relationships between hydraulic property parameters(flow regime,flow velocity,mean depth and friction factor)and discharge,slope gradient were simulated in a hydraulic flume(5 m×0.4 m×0.4 m). The unit discharge varied from 0.625×10-3/(s·m) to 12.5×10-3m3/(s·m),and the slope gradients varied from 5° to 25°. The results indicated that there is deeply relationship between the flow regime and the flow depth. The flow mean velocity,depth and the Darcy-Weisbach friction factor(f)are mainly controlled by the discharge,and can be well simulated by a simple power function of unit discharge and slope gradient. The determination coefficient are 0.98,0.97 and 0.95 respectively1 When the slope gradient is cancelled,the determination coefficients only decrease 7%,16% and 3%. When the Reynolds number increases,the Darcy 2Weisbach friction factor decreases as fine power function1 The influence of slope gradient on f depends on the discharge.
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