Detailed visual seabed survey at drilling site 7218/11-1
Detailed visual seabed survey at drilling site 7218/11-1
Detailed visual seabed survey at drilling site 7218/11-1
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Figure23. Map illustr<strong>at</strong>ing the densityestim<strong>at</strong>ion(%coveragesponges)on the sedimentsurface.Seemethods<br />
sectionfor quantific<strong>at</strong>ionmethod.Blackcrossesindic<strong>at</strong>eobserv<strong>at</strong>ions;d<strong>at</strong>a are interpol<strong>at</strong>edbetweenpointsby<br />
the krigingmethodin SURFERprogramme.<br />
Basedon Figure23, a total of 30 positionswere selectedfor a more detailed analysisof biological<br />
conditions (Figure 24). Thesewere placed in areasrepresent<strong>at</strong>iveof the various spongedensity<br />
assessments,andserveto 'ground-truth' the <strong>visual</strong>assessmentsmadeduringthe field mission.<br />
<strong>Detailed</strong> <strong>site</strong> <strong>survey</strong> <strong>at</strong> PL531 Darwin<br />
Akvaplan-niva AS Rapport 6051 - 1 29
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