2nd phase of Geophysical investigations completed for Gozo tunnel

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Second phase of Geophysical investigations completed for Gozo tunnelThe University of Malta has completed the second phase of the geophysical investigations that will establish a geological model which will guide the conceptual design of the proposed tunnel between the islands.

The University said that researchers used a multibeam echo sounder to create a 3D map of the seabed. They emit an acoustic pulse at a particular frequency which hits the seabed and is reflected back. The software registers the time it takes and since the speed of sound in water is known, can calculate the depth of the sea-bed.

This system emits 500 of these impulses at one go. Thus by moving with the boat the researchers mapped bands of the bottom at a very high resolution.

The first phase gave details of the geological structure of up to 400 metres below the seabed. Scientists deployed a 300-metre-long cable with a series of specialised receptors. An ‘air gun’ released bursts of compressed air every few metres. The compressed air was reflected back to the receptors.

Different geological layers reflect back different frequencies. Scientists can thus determine the geological formations that lie beneath the surface and determine possible cracks. The University said that for several days, the vessel Midas express navigated between the islands repeating this process.

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    3 Responses

    1. Lino DeBono says:

      If the surveys being conducted leave a positive reply, then Gozitans can expect that somewhat in the future connectivity can and will actually be achieved. If so then Gozitans will be connected with the outside world and work opportunities and also positions elevations will be opened and available to all Gozitans.
      There will also be several repercussions for Gozo, but the positive side of this connection will bring, will far outweigh the negativity which Gozo will also endure.

    2. george palmer says:

      It’ll never happen in a thousand years. I hope the University are funding this, not the taxpayer.

    3. Jake says:

      Who IS funding this survey anyway?..

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