Sediment Flux & ADCP Jeroen Aardoom Aqua Vision The Netherlands

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) Q (m3/s) ADCP measures water velocity (discharge)

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) Q (m3/s) ADCP measures water velocity (discharge) ADCP 36.9 m3/s

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Take a water sample Flux 1 sample = 36.9 m3/s * 32 (g/m3) = 1.18 kg/s

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Take multiple water samples, Sa i Average SSC samples = 30.2 g/m3 Flux 9 samples = 36.9 m3/s * 30.2 (g/m3) = 1.11 kg/s

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Averaging should be weighted with Q Flux = Q L * + Q M * + Q R * QLQL QMQM QRQR

Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Instead of 3 sections Flux ADCP Q bin *SCC bin = 1.85 kg/s QLQL QMQM QRQR, use Q per ADCP bin, and SSC per bin

Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Flux 9 samples = 1.11 kg/s Flux 1 sample = 1.18 kg/s Flux ADCP = 1.85 kg/s Flux = QLQL QMQM QRQR

Sediment Flux (g/s) = Q (m 3 /s) * SSC (g/m 3 ) SSC (g/m3) Need to convert ADCP signal to SSC Software tool for conversion

ViSea - STB (PDT)

ViSea STAR

ViSea STB (PDT) versus ViSea STAR ViSea STB (PDT) 3-D, survey package Real Time data acquisition ADCP, GPS, OBS, CTD, DS, Gyro etc Accounts for stratified conditions For dredge plumes and tidal/estuary ViSea STAR 1 screen only Post processing Easy to use For inland waterways, natural streams

ViSea STAR