Juuassa tutkitut suot ja niiden turvevarat, Osa 3. - Geologian ...
Juuassa tutkitut suot ja niiden turvevarat, Osa 3. - Geologian ...
Juuassa tutkitut suot ja niiden turvevarat, Osa 3. - Geologian ...
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Leino, Jukka 2010. <strong>Juuassa</strong> <strong>tutkitut</strong> <strong>suot</strong> <strong>ja</strong> <strong>niiden</strong> <strong>turvevarat</strong>, <strong>Osa</strong> <strong>3.</strong> – The<br />
Peatlands and peat Resources of Juuka, Eastern Finland, Part <strong>3.</strong> <strong>Geologian</strong><br />
tutkimuskeskus, Turvetutkimusraportti 426, Geological Survey of Finland,<br />
Report of Peat Investigation 426, 105 pages, 49 figures and 2 appendices.<br />
The Geological Survey of Finland studied 46 peatlands (total 3 744 ha) in<br />
Juuka municipality in 2002–2004. Elevation, site type, peat type and its decomposition<br />
degree, snag content and subsoil type were determined and recorded<br />
in the field. A total of 1781 samples were analysed for water and ash<br />
content. A part of those were analysed for dry bulk density, net calorific value<br />
and sulphur content.<br />
The most common peatland types are pine bogs (43 %), open fens (11 %),<br />
drained peatland forest types (34 %), cultivated peat soils (2 %) and spruce<br />
mires (10 %). The proportion of undrained peatlands is 12 %. The distribution<br />
of Sphagnum dominated peat is 34 % and Carex dominated peat is 66 %. The<br />
mean degree of peat humification (H1-10) is 5.4. The mean depth of studied<br />
peatlands is 1.3 m and the total storage of peat approximately 50.0 million m 3<br />
in situ. The studied area deeper than 1.5 m covers 1 340 hectares and contains<br />
about 32.1 million m 3 of peat. The average ash content of peat is 4.3 % of dry<br />
weight, the dry bulk density 91 kg/m 3 , effective calorific value of dry peat 21.1<br />
MJ/kg and the sulphur concentration 0.42 % of dry weight.<br />
Altogether, 42 mires covering 1 206 hectares are evaluated to be suitable<br />
for fuel peat production. This is about 32 % of the studied total peatland<br />
area. The available amount of energy peat is about 22.1 million m 3 in situ. The<br />
energy content is 10.6 MWh at 50% moisture content. Three (3) peatlands are<br />
found suitable for horticultural peat production. The area and peat quantity of<br />
these areas is 297 hectares and 0.67 million m 3 .<br />
Keywords: peatland, mire, peat, energy peat, horticultural peat, Juuka<br />
Jukka Leino<br />
Geological Survey of Finland<br />
P.O. Box 1237<br />
FI-70211 Kuopio<br />
Finland<br />
E-mail: jukka.leino@gtk.fi
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