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Open AccessArticle

Geometric Characteristics of Spur Dike Scour under Clear-Water Scour Conditions

Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
Water Institute of Civil Engineers, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Author to whom correspondence should be addressed.
Water 2018, 10(6), 680;
Received: 19 April 2018 / Revised: 7 May 2018 / Accepted: 15 May 2018 / Published: 24 May 2018
(This article belongs to the Special Issue Water-Worked Bedload: Hydrodynamic and Mass Transport)
Factors such as flow and sediment characteristics affecting the spur dike’s local depth of erosion have yielded considerable research results, but there is little discussion of the geometry of the spur dike’s local scour holes. This study focuses on the spatial characteristics of the geometry of local scour holes in straight-wall spur dikes. The discussion shows that the spur dike arrangement clearly changes the plane geometry of the scour hole. The maximum scour depth has a power function relationship with the area of the scour hole and the scour hole-volume. Moreover, the ratio of the product of the maximum scour depth and the plane area of the scour hole to the scour hole-volume is a fixed constant. The average slope of upstream of the scour hole and along the axis direction of the spur dike is slightly larger than the angle of repose of the sediment, the slope distribution of the scour holes profiles presents an inverted “U” type, and its profile morphology and slope distribution have geometric similarity. This distribution also reflected that, the interaction between the downward flow and the horseshoe vortex inside the scour hole leads to the formation of a cusp. View Full-Text
Keywords: spur dike; scour; scour depth; scour holes; morphology spur dike; scour; scour depth; scour holes; morphology
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Zhang, L.; Wang, P.; Yang, W.; Zuo, W.; Gu, X.; Yang, X. Geometric Characteristics of Spur Dike Scour under Clear-Water Scour Conditions. Water 2018, 10, 680.

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