Experimental Study on Local Scour Before and After the Channel Bend

Abstract

Experimental studies on local scour at bridge pier are explored widely both theoretically and experimentally. There are many factors involved in the magnitude of local scour depth at piers such as velocity of the approach flow, depth of flow, size and gradation of bed material, and bridge pier itself. This paper presents a comprehensive review and highlights thus far in study of the effects of sediment discharge on local scour before and after the channel bend. Lately, the addition of many types of structures has extremely altered the morphology of river regimes, and caused major influence on the transport and deposition of sediment. During the unforeseeable circumstances such as river floods, extreme erosion, denudation of forest, and mass wasting at the upstream zone the scour hole can happen and can affect failure to the bridge pier. The development in the theoretical and laboratory findings on the effects of sediment discharge on local scour before and after the channel bend will be of importance to the science of river morphology as this contributes to the shaping of the river landscape for future studies.