Abstract
The continued development of acoustic backscatter technology for suspended‐sediment measurement is an important goal that, when attained, will result in sediment transport data of unprecedented quality and quantity. Towards this end, an instrumented raft has been deployed in an ephemeral stream in the North Mississippi area. The raft is used as a floating instrument platform that allows acoustic transducers to stay in contact with the water surface during stage changes caused by runoff into the stream channel. The single‐frequency acoustic data is calibrated for both particle size and concentration using concurrent pumped samples of the water/sediment mixture collected from various levels above the stream bed. Data from several storm events has been acquired and will be presented, including time series of converted suspended‐sediment concentration data and estimates of errors introduced during the conversion process.
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