Our ability to predict the timing and quantity of suspended sediment transport is limited because fine sand, silt and clay delivery are supply-limited, requiring empirical modelling approaches of limited temporal stability. Here, I evaluate a 300 kHz side-looking acoustic Doppler current profiler (aDcp), mounted in the Fraser River, BC, for continuous measurement of suspended sediment flux. I also evaluate a downward-looking 600 kHz aDcp at the same site. Both aDcps are calibrated against conventional bottle samples obtained with a USGS P63 sediment sampler. The results suggest that it is possible to estimate total suspended sediment flux using a 300 kHz side-looking aDcp in the Fraser River, but that it underestimates observed flux. The calibration of the 600 kHz aDcp is strong (R2=0.72), but it underestimates total sediment flux at low-moderate flows and overestimates flux at high flows.
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Thesis advisor: Venditti, Jeremy
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