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- W2016015633 abstract "Sediment concentration measurement in high-concentration runoff waters is highly problematic. A novel devicewas developed for high-concentration measurements. This device was then used to measure sediment concentrations duringmonsoon runoff events at the USDA-ARS Walnut Gulch experimental watershed in southeast Arizona as an exampleapplication. Data were obtained using a 55 cm, three-prong, embedded time domain reflectometry probe and sediments ina range of size classes from the site under laboratory conditions. In the laboratory, the sensor’s concentration output wascalculated using a model and the empirical function describing pure water. Without sediment-specific calibration, laboratoryvalidation indicated agreement with known concentrations within about 0.02 kg L-1 for sediment and water mixtures andwithin 0.2 kg L-1 when the probe was completely buried in 0 to 2.5 cm channel bed material. In the field application, the probewas installed in the base and center of a flume. Basal (0 to 2 cm depth) sediment concentrations were monitored during threeflows with peak discharges of 5, 70, and 130 m3 s-1, representing small, intermediate, and large events. For the large andintermediate events, basal sediment concentrations rose from 0.4 to 1.2 kg L-1 to a plateau of 1.5 to 1.9 kg L-1 after the flowpeak. The plateau extended through much of the tail of the hydrograph before falling to back to 0.4 to 1.2 kg L-1. The smallevent had a similar progression but lower overall concentrations of 0.2 to 0.8 kg L-1. These observations are consistent witha period of high sediment transport and channel erosion in the tail of monsoon runoff hydrographs. The dielectric methodprovides in-situ measurements in high-concentration environments where traditional methods fail." @default.
- W2016015633 created "2016-06-24" @default.
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- W2016015633 date "2005-01-01" @default.
- W2016015633 modified "2023-09-26" @default.
- W2016015633 title "BASAL SEDIMENT CONCENTRATION MEASUREMENT USING A TIME DOMAIN REFLECTOMETRY METHOD" @default.
- W2016015633 doi "https://doi.org/10.13031/2013.17964" @default.
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