Spatial variability of selected physicochemical parameters within peat deposits in small valley mire: a geostatistical approach
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Date
2014-12
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Instytut Geologii UAM
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Abstract
Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic
sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various
types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data
(pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models
that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the
X–Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution
of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic
mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations
of the southwest part of the mire and increased participation of mineral matter in the peat. In turn, the upper
peat layers of some of the central part of Ldzań mire are rather spongy, and these peat-forming phytocoenoses probably
formed during permanent waterlogging.
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Keywords
peat, geostatistics, organic matter, pH, spatial analysis
Citation
Geologos, 2014, 20, 4, s. 269-288.
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ISBN
978-83-232187-4-6
ISSN
1426-8981