Paper Details

[ Downloads: 0 | Abstract Viewed: 64 | Pages: 8 ]

Abstract of the Article

Note: English CIVILICA is in its Trial Period so Full Texts can not be provided! Persian users can download it here

Depth Scouring Reduction on Spur Dike by Using of Experimental Study

Authors:
[ Mahmoudi ] - M. Sc. Student of civil Eng. Dept. Amir kabir Univ.
[ Saneie ] - Assist Prof . of River Division, Soil Conservation and Watershed Management Research Institute
[ Ardeshi ] - Assist Prof . of civil and Environmental Eng. Dept., Amir kabir Univ.

Abstract:

One of the common methods of river improvement and bank protection is using spur dikes. Building spur dikes makes the path to be modified. Because of the concentration of flow in the middle of the river it causes the river side not to be washed out. This new river path makes the bottom of the river next to the end of the spur dikes to be washed out. Usually the spur dikes are built in group because of extending the protected zone. The stability of these spur dikes against the river flow depends on stability of the first spur dike. The purpose of this laboratory research is to investigate different ways for reduction of erosion in the first spur dike. It is suggested to use a shorter spur dike at the upstream part in perpendicular to the flow direction. Aim in this research , it is intended to find the optimum distance between shorter spur dike and first spur dike in order to have minimum erosion in the first spur dike. From the hydraulics point of view, L’/L (the length of shorter spur dike to the length of first spur dike), X/L (the distance between first spur dike and shorter spur dike to the length of first spur dike) and Froude number has been studied and results has been presented in the form of equations.

Keywords:

Spur Dike, Erosion, Experimental Study, Scour, Fine material