| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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| Research Abstract |
The acquisition of continuous measurements of river discharge is a high-priority issue for water resource management, and the real-time knowledge of river discharge is an environmental, social, and economic asset. Therefore, establishing a method and/or technology for quantifying discharge is of paramount importance.
Fluvial Acoustic Tomography System (FATS): a state-of-the-art acoustic system was developed. Continuous measurements of the flow rate were conducted in an tidal estuary and an gravel-bed river using FATS. FATS equipped with a couple of broadband transducers with horizontally omnidirectional and vertically hemispherical beam patterns can be used to estimate the flow rate from multiple ray paths that cover the cross-section of a stream.
The present study strongly suggest that FATS is a reliable and accurate technique for the long-term measurement of river discharge, even in shallow, wide rivers or tidal estuaries with salinity intrusions.
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