Control Structures for Sand-Bed Channels

by Frederick C. Stepanich,
Daryl B. Simons,
Everett V. Richardson,


Serial Information: Journal of the Waterways and Harbors Division, 1964, Vol. 90, Issue 2, Pg. 1-46


Document Type: Journal Paper

Abstract:

A laboratory study demonstrated the feasibility of constructing a relatively short channel to serve as a control structure to stabilize the depth-discharge relation in an alluvial sand channel. The large variations and discontinuities present in depth-discharge relations for alluvial sand channels resulting from scour and fill and changes in bed configuration are eliminated by this control. Such a structure also creates sufficient turbulence to suspend the bed material of the channel so that conventional suspended sediment samplers can be used to measure the total sediment discharge. The control was effective with a moderate amount of head loss, so that backwater effects and downstream erosion were minimal. The rock channel control should be more economical to construct than other concrete controls that are described. However, prototype studies are needed to develop the design specifications for the controls.



Subject Headings: Hydraulic structures | Bed materials | Alluvial channels | Structural control | Suspended structures | Sand (hydraulic) | Feasibility studies | Channel stabilization | Laboratory tests

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