Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Online ISSN : 1884-7242
Print ISSN : 1882-2789
ISSN-L : 1882-2789
Research Papers
Observation of Sediment Yield by Acoustic Bedload Sensor and Turbidity Meter in Agricultural and Forest Watershed
Keiji UNOKIMasayuki KOHIYAMATakuro SUZUKIKazumasa NAKAMURA
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2015 Volume 83 Issue 5 Pages I_155-I_164

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Abstract
Among the automatic measuring devices used for observing sediment flow in rivers, turbidity meter are commonly used for the observation of suspended sediments. However, no techniques have been established for the observation of bedload transport. In this study, suspended sediments and bedload transport were automatically observed by using turbidity meter and acoustic bedload sensor, respectively, at inlet of settling basin in the end of agricultural and forest watershed. As for this automatic observation data, it was shown that the observational error was small by comparing it with sediment deposit etc. by settling basin. The result of two-year observation showed bed load to account for 8% of the sediment flow in the river. While the relationship between the discharge and the suspended sediment load (L-Q) during floods varied depending on the amount of rainfall or snowmelt, the relationship between the discharge and the bedload transport was steady regardless of the cause of flooding.
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© 2015 The Japanese Society of Irrigation, Drainage and Rural Engineering
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