Nowadays stream restoration structure’s design features is an active field of research for river engineers. Low-environmental impact is the main characteristics of these types of structures in needless of frequent human interventions during the operation. These structures are used for riverbank protection, river grade controlling and improving the aquatic habitat. This study aims to compare scour downstream of two different low-head grade-control structures; Log-Vane and Log-Deflectors. The analysis contains the results of laboratory experiments conducted at the hydraulic laboratory of the University of Pisa and a detailed comparison of scour hole characteristics, highlighting similitudes and differences in the respective ranges of application. All tests have been done in clear water conditions using uniform sand as channel bed material.
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