IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 4: Responding to Shifting Water Resources : An experimental study on the effect of under-scouring depth and horizontal spacing between two bed p...
An experimental study on the effect of under-scouring depth and horizontal spacing between two bed protection blocks on the stability of frontal block
Author : Prem Shah1, Norio Tanaka1 and Junji Yagisawa1
Stability of river-bed protection block at flood event is affected by under-scouring of the block. Block spacing effects for block stability was investigated with different under-scouring conditions. Three blocks were placed at the bottom in a flume with changing under-scouring depth of frontal block and spacing between the first and second block. Drag and lift forces were measured directly in each experimental condition. PIV technique was used for visualizing flow and evaluating streamline pattern. The experimental results show that for same under-scouring gap, the lift and drag coefficient decreases with increasing spacing between two blocks. In addition, if the under-scouring gap increases under the same horizontal spacing, then the lift coefficient increases and the drag coefficient decrease. These results demonstrate that, wider spacing is suitable for stability of frontal block for under-scouring condition.
File Size : 7,034,213 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 4: Responding to Shifting Water Resources
Date Published : 01/07/2011
Download Now