ICタグ技術を用いたトレーサ調査手法による砂礫移動観測 EXECUTION OF TRACER INVESTIGATION TECHNIQUE ON GRAVEL MOVEMENT THAT APPLIED IC-TAG TECHNOLOGY
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In case that we evaluate the effect of sediment replenishment during a flushing flow operation, there was no sophisticated measurement method to monitor gravel movements on the river bed. We have developed a tracer investigation technique on gravel movements that applied the IC-Tag technology. This system is composed of an ICTag that is inserted in each gravel, an antenna, an amplifier and a data logger. We have tested this system at the flushing operation of Managawa dam in 2005 and succeeded to find out flushed out gravels with IC-Tag in the downstream river bed.<BR>In this paper, we present results of field tests on two different river channel conditions. One is Managawa river during flushing operation in 2006 and another is Hiru valley in Zintsu river during sediment flushing from a small sediment check dam. We have tested both a fixed type antenna to measure sediment passing time real-time basis and a movable type one to measure sediment movement after the event. Through these field tests, basic characteristics of the system and future challenges are discussed.
- PROCEEDINGS OF HYDRAULIC ENGINEERING
PROCEEDINGS OF HYDRAULIC ENGINEERING (52), 889-894, 2008
Japan Society of Civil Engineers