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Crushed and Fine Graded Stone Analogue  - Light Grey
Crushed and Fine Graded Stone Analogue - Light Grey
4kg
£32.40
Specialist Aggregates Group
Specialist Aggregates Ltd Marine Arts
EMU Tracer
Tuesday 29 March, 2011
News Brief

Problem: How do you identify the direction of travel of sand in the English Channel?

Full Story:

Finding needles in haystacks comes as easy when compared to establishing a method to identify a grain of sand in the English Channel. However, this was the challenge recently completed by Portsmouth based marine survey consultants, EMU Ltd

The research project undertaken by EMU was to establish how grains of sand released from dredging operations were settling and migrating across the bed of the Channel.

Researchers turned to Specialist Aggregates first to identify a range of sands with similar physical characteristics to those at the test site. The problem was then to produce a sand which could be traced after being seeded into a sand discharge.

For environmental reasons a radio active tracer was unacceptable so Specialist Aggregates developed a unique UV response coating onto the sands which was demonstrated under laboratory conditions to be detectable up to 1000km from the drop site.

Sands in a range of closely graded particle size were manufactured each with a unique UV colour response signature and the test drop was completed in the Summer of 2008.

Whilst the results of the work are confidential, researches reported back that they were entirely satisfied with the performance of the sands having managed to locate and identify particles up to 6km from the drop site a full three months after placement of the tracer.

Extra Information:

For more information, please visit this related link:  Further information on the work of EMU Ltd.



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