Title :
A Study on the Roughness with Extra Fine Sediment in Open Channel
Author :
Zhu, Changjun ; Wang, Qingdong
Author_Institution :
Coll. of Urban Constr., Hebei Univ. of Eng., Handan, China
Abstract :
In view of the abnormal phenomenon that a flood peak increased in August 2004 and July 2005 along the lower Yellow River, the mechanism of this abnormal phenomenon is studied. It is found that the flood increase was due to the decrease the channel roughness in the propagation of high concentrated flood carrying the extra fine sediment which was discharged from Xiaolangdi reservoir. Then the experiment with extra fine sediment flowing smooth, roughness beds was studied. Based on the comparison between the distributions of velocity and the analysis of resistance in the experiment, the results show that resistance of flow may be considerably reduced by the extra fine sediment if the flow boundary is rough. It has the significant value for the flood control and flood prediction.
Keywords :
channel flow; drag reduction; floods; hydrodynamics; reservoirs; sediments; Xiaolangdi reservoir; Yellow river; channel roughness; extra fine sediment; flood control; flood peak; flood prediction; flow boundary; open channel; Current measurement; Drag; Educational institutions; Electric resistance; Electrical resistance measurement; Floods; Fluid flow measurement; Rivers; Sediments; Velocity measurement; drag reduction; experiment; flow with suspended sediment; roughness;
Conference_Titel :
Innovation Management, 2009. ICIM '09. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-0-7695-3911-9
DOI :
10.1109/ICIM.2009.37
