Investigation of Groins Construction on Beach Deformation

Groins are often used in river engineering for navigation improvement or bank support, as well as in coastal engineering for bank or beach protection. Groins are 'hard' engineering structures specifically deployed for shoreline protection and/or stabilization. In some specifically-designed cases, they are employed to facilitate enhancement of navigation channel tidal flows, in order to promote sediment scouring. In recent years there is growing interest in using groins for stream corridor restoration projects. The embayment region between successive groins acts as a dead water zone where the local residence time of suspended particulate matter is much larger under certain condition groin fields can provide condition necessary for natural growth of the vegetation in the river or coast. first in the article the groyne impact on beach was investigated, however design criteria in to other coastal's books has been observed, The Scour criteria at this structure is paid less. At the end of the paper to the Scour risk of coast predicted.