Download Acoustic Investigation of Complex Seabeds by Jacques Yves Guigné, Philippe Blondel PDF

By Jacques Yves Guigné, Philippe Blondel

ISBN-10: 3319025783

ISBN-13: 9783319025780

ISBN-10: 3319025791

ISBN-13: 9783319025797

Offshore drilling and buildings require specified wisdom of the geophysical homes of the seabed and sub-seabed, as unforeseen gadgets can decelerate or halt initiatives. This e-book offers the state of the art in acoustic exploration of the seabed and sub-seabed, from preliminary designs within the Eighties to advertisement contracting and operation of the Acoustic Corer™ within the final decade. The Acoustic Corer™ is a high-definition advertisement acoustic sub-bottom imaging approach, generating an “acoustic middle” in which sub-seabed sedimentary features and discrete buried gadgets greater than 1/2 m could be pointed out and mapped. It uses the cutting edge JYG-cross layout, encouraged by way of seismic mirrored image and makes use of artificial Aperture Sonar (SAS) multi-angle scattering in and in the seabed to convey unheard of imagery. This e-book used to be written via the inventor of those innovations, a identified professional in seabed acoustics, with aid from an skilled educational and writer. it's meant at the start as a “how-to” advisor for offshore industries taking a look at innovations to make the deploy of alternative forms of buildings secure and efficient.

Show description

Read Online or Download Acoustic Investigation of Complex Seabeds PDF

Similar geophysics books

Looking into the Earth : An Introduction to Geological Geophysics

Having a look Into the Earth comprehensively describes the foundations and functions of either 'global' and 'exploration' geophysics on all scales. It varieties an advent to geophysics compatible should you don't inevitably intend to develop into specialist geophysicists, together with geologists, civil engineers, environmental scientists, and box archaeologists.

Contributions to Antarctic Research IV

Concerning the ProductPublished through the yankee Geophysical Union as a part of the Antarctic learn sequence. content material:

Quaternary Geology of the Great Basin: Inglewood, California to Salt Lake City, Utah June 27-July 8, 1989

In regards to the ProductPublished via the yank Geophysical Union as a part of the sphere journey Guidebooks sequence. box journey T117 is designed to give a number of Quaternary geological stories from part of the yankee Southwest. Specialties in the wide scope of "Quaternary geology" that would be mentioned comprise archaeology, climatology and paleoclimatology, geochemistry, geomorphology, paleoecology, paleontology, pedology, sedimentology, stratigraphy, tectonics, and volcanology.

Additional resources for Acoustic Investigation of Complex Seabeds

Example text

5, right) and offering the potential to sample the seabed in locations of interest. First tests in Hamilton Harbour, Ontario (Canada) showed the potential of the frequencies used (60–120 kHz) to delineate fine seabed stratigraphy (Fig. 6). As with the previous approach, stacking greatly increases the signal-to-noise ratio. Here, though, stacking was also used with different secondary frequencies, as recommended by Guigné et al. (1991). Hilbert transforms of the individual signals provide their envelopes (Fig.

6 Example data from a single transducer (from Guigné et al. 1991). Top left: dispersion test of the water column, for frequencies of 120, 100, 80 and 60 kHz (from left to right). Top right: acoustic returns from the seabed at the test site. Bottom left: frequency summation, highlighting different fine-scale stratigraphy levels (B to K). Bottom right: instantaneous amplitudes for the 4 different frequencies was deployed from a cable over the side of the ship, taking a picture of the “ground truth” with accurate localisation of where the 40 detailed acoustic measurements come from (Fig.

2 indicated the need for bespoke signal processing, enabling the derivation of both 2-D and 3-D information about the seabed and its sub-surface. This will be illustrated using drawings and results from the 1991 experiment (Guigné et al. 1991). The deployment of the Acoustic Seabed Interrogator in a complex sedimentary setting was completed with Cone Penetrometer Tests (CPT) and several boreholes around the centre of the frame (Fig. 3). Four rotations of the boom, at 45° angles, provided linear “beams” of 12 series of measurements, corresponding to the activation of each of the 16 transmitters in turn.

Download PDF sample

Rated 4.32 of 5 – based on 48 votes