Total Load of Bed Materials in Open Channels

by Hideo Kikkawa, Prof.; Dept. of Civ. Engrg., Tokyo Inst. of Tech., Meguro-ku, Tokyo, Japan,
Tadaharu Ishikawa, Grad. Student; Tokyo Inst. of Tech., Meguro-ku, Tokyo, Japan,

Serial Information: Journal of the Hydraulics Division, 1978, Vol. 104, Issue 7, Pg. 1045-1059

Document Type: Journal Paper


Bed material load is usually classified into bed load and suspended load. They have been treated individually in the previous theoretical studies, but obtain the expression of total load, their mutual relation must be formulated. The main objective in this investigation is to study this relation. The basic consideration is that the bed layer is formed under the balance of vertical forces acting on sediment particles near and on the bed surface, and this layer can be regarded as the source of sediments to be diffused to the region of suspended load. According to this consideration: (1)A new stochastic model that interrelates bed load and suspended load is considered to simulate the particle movement; and (2)the equation of dynamic balance in the bed layer is introduced and improved by using the results of basic experiments. A total load equation is derived by combining the results of two processes. The data presented by U.S.G.S are used to verify it.

Subject Headings: Suspended loads | Bed loads | Bed materials | Dynamic loads | Open channels | Vertical loads | Particles | Bed forms

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