Sediment sampling evaluated with a new weighting function and index of reliability

A distance weighted average and a reliability index for the areal mean was developed in the process of estimating quantity and distribution of a patchy and highly variable regionalized variable: the ephemeral fine sediment thickness of a shallow marine embayment. The distance weight is partly a func...

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Bibliographic Details
Published in:Hydrobiologia 1989-07, Vol.176-177 (1), p.451-464
Main Author: FLODERUS, S
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
General geology
Marine
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Summary:A distance weighted average and a reliability index for the areal mean was developed in the process of estimating quantity and distribution of a patchy and highly variable regionalized variable: the ephemeral fine sediment thickness of a shallow marine embayment. The distance weight is partly a function of the morphometry of the surroundings, i.e. lower weight is given to a nearby sampling point, at a given distance, when area-typical morphometric parameters suggest a higher bottom variability. After interpolation, the reliability of the areal mean is quantified. The index of reliability, thus defined, is a function of the overall sampling intensity and coverage of the area. It makes data comparable despite varying morphometry and survey regularity and completeness. It is an aid to a more effective sampling strategy. Sediment thickness maps, and the mean and reliability index, are presented from 14 different sampling surveys. Tests were made to examine the validity of the approach. (DBO)
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00026581