Title :
A multi-frequency acoustic backscatter recorder for suspended sediment transport studies
Author :
Pearson, N.D. ; Thomas, M.R.
Author_Institution :
Fisheries Lab., Minist. of Agric., Fisheries & Food, Lowestoft, UK
Abstract :
A three frequency echo-sounder and data logger for recording the acoustic energy back-scattered by fine suspended sediments in the sea has been developed. The use of three high frequencies will allow the estimation of particle size as well as total suspended load. The system is usually deployed 1.2 m about the sea bed mounted on a large, instrumented tetrapod which records water currents, surface wave activity and suspended sediments by optical backscatter and beam attenuation. The authors describe the current state of the equipment which has been developed from a simple, one frequency system
Keywords :
backscatter; data recording; ocean waves; oceanographic equipment; sediments; sonar; ultrasonic equipment; underwater sound; 1 to 10 MHz; acoustic backscatter recorder; data logger; multifrequency echo-sounder; ocean; surface wave activity; suspended sediment transport studies; ultrasonic equipment; water currents;
Conference_Titel :
Monitoring the Sea, IEE Colloquium on
Conference_Location :
London
