Author(s): Obaidullah Safie; Akihiro Tominaga

Linked Author(s): Akihiro Tominaga, Obaidullah Safie

Keywords: No Keywords

Abstract: Impermeable and permeable spur dikes are used to protect banks of an open channel. Impermeable spur dike suffers from structural instability due to local scour; whereas, high permeable spur dike cannot protect the bank sufficiently. In this study, pile-group dikes are investigated in order to reduce the velocity behind structure for the purpose of bank protection and improving aquatic habitat with expected reduced local scour around structure. An experimental study on the flow characteristics around pile-group dike structures is conducted using particle image velocimetry (PIV) method. Pile-groups were arranged with in-line and staggered arrays. Quantitative analysis on flow field around impermeable spur dike and various permeability pile-group dikes are considered. The results indicate that staggered arrangement pile-group dike demonstrated efficient significance than impermeable and in-line arrangement dikes.

DOI:

Year: 2018