TY - JOUR
T1 - Electrical Resistance Tomography for suspended sediment measurements in open channel flows using a novel sensor design
AU - Schlaberg, H. Inaki
AU - Baas, Jaco H.
AU - Wang, Mi
AU - Best, Jim L.
AU - Williams, Richard A.
AU - Peakall, Jeff
PY - 2006/10
Y1 - 2006/10
N2 - Understanding the transport and deposition of sediment (such as sand and clay) is essential to allow the modelling and prediction of sediment dispersal, and the development of depositional morphology, within modern environments and ancient sedimentary basins. Electrical Resistance Tomography (ERT) has previously been used to provide a measure of particle concentration within moving suspensions. ERT measurements normally employ electrodes around a circular boundary of a container that allows measurement of multiple projections. However, measuring the concentration of a flow in a rectangular channel without disturbing the flow cannot use these well-established sensor rings. This paper investigates the use of a linear sensor array in the channel bed, and a U-shaped sensor array in the channel bed and walls, to measure spatial and temporal gradients in sediment concentration/conductivity of a channellised flow. To overcome the problems with the effect of sediment-covered electrodes and the limited number of projection angles of a linear sensor configuration, the properties of a U-shaped sensor are explored. Due to the additional projection angles in a U-shaped sensor, improved reconstructions are obtained. This paper presents the first measurements of suspended sediment concentration and sediment deposition and test objects using linear and U-shaped tomographic sensors.
AB - Understanding the transport and deposition of sediment (such as sand and clay) is essential to allow the modelling and prediction of sediment dispersal, and the development of depositional morphology, within modern environments and ancient sedimentary basins. Electrical Resistance Tomography (ERT) has previously been used to provide a measure of particle concentration within moving suspensions. ERT measurements normally employ electrodes around a circular boundary of a container that allows measurement of multiple projections. However, measuring the concentration of a flow in a rectangular channel without disturbing the flow cannot use these well-established sensor rings. This paper investigates the use of a linear sensor array in the channel bed, and a U-shaped sensor array in the channel bed and walls, to measure spatial and temporal gradients in sediment concentration/conductivity of a channellised flow. To overcome the problems with the effect of sediment-covered electrodes and the limited number of projection angles of a linear sensor configuration, the properties of a U-shaped sensor are explored. Due to the additional projection angles in a U-shaped sensor, improved reconstructions are obtained. This paper presents the first measurements of suspended sediment concentration and sediment deposition and test objects using linear and U-shaped tomographic sensors.
KW - Channel flow
KW - Suspended sediment
KW - Tomography
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U2 - 10.1002/ppsc.200601062
DO - 10.1002/ppsc.200601062
M3 - Article
AN - SCOPUS:33750737046
SN - 0934-0866
VL - 23
SP - 313
EP - 320
JO - Particle and Particle Systems Characterization
JF - Particle and Particle Systems Characterization
IS - 3-4
ER -