EFFECTS OF HEAD PARTS TYPES OF SPUR DYKES ON THE HYDRAULICS IN THE EMBAYMENTS

Abstract

Spur dykes have a variety of types in materials and shapes etc. In this paper, shapes of spur dykes, especially their head parts which are installed parallel to the main flow direction is studied. The laboratory experiments were conducted for 10 spur dykes in a straight flume with a movable bed and 10 spur dykes. Effects of the length of the head parts on bed configurations and the flow were determined and discussed. The equilibrium bed configurations and the velocity on surface flow were also measured. How the shapes of the spur dykes make geometric diversity in the embayment, and possibly diversity of habitats, is highlighted.