Experimental observations of alluvial bed morphology in curved channels
1997
Valiani, A. (Universita di Firenze, Firenze (Italy). Dipt. di Ingegneria Civile)
The present paper deals with some experimental runs performed in a curved channel that was built in the external hydraulic models area of the Civil Engineering Departament of Florence University. The experimental apparatus has the major advantage to be a quite large scale model of some natural curved channel, its length being of the order of 30 m. Total discharge, longitudinal velocity and bottom elevation were measured in a quite large number of cross-sections. The 6 experimental runs cover a range of Froude number between 0.2 and 0.4, a range of the width to depth ratio between 5 and 17, and typical mean values of Shields mobility parameter between 0.1 and 0.2. The paper is principally devoted to offer a complete picture of bottom topography after a certain time of flow of constant discharge, in order to offer a complete database for direct comparison with mathematical models results
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