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.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Research on the dynamic state of river-mouth bar under flood conditions in the yuragawa river
Research on the dynamic state of river-mouth bar under flood conditions in the yuragawa river
Author : TAKAHARU OCHI(1), KEIICHI KANDA(2) , HIROSHI MIWA(3) & FUMINORI NAKAMURA(4)
ABSTRACT
The topography of a sand bar is continuously affected by river runoff, ocean currents and sea wave action. Disruptions
in any of these factors can alter the geometry of the sand bar, causing sedimentation problems and increased risk of
flooding. In order to mitigate the risks associated with such changes, it is important to understand the characteristics of
the topographic changes of river-mouth bars, and to develop a method for controlling the bar geometry. This study
examined the effect of variations in the geometric properties of a river-mouth bar using hydrological data (river water
discharge and sea wave height). The application of spur dikes to promote erosion of the sand bar by altering the
direction of river flow was evaluated by means of flume experiments. A two-dimensional numerical model (iRIC Project)
was also applied to examine the effectiveness of spur dikes on river-mouth bar control. The results of this study clarified
the efficiency of measures for managing sand bar formation at the mouth of the Yuragawa River in Kyoto Prefecture,
Japan.
File Size : 1,955,785 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 27/08/2015
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