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| Titel |
Soil moisture in sessile oak forest gaps |
| VerfasserIn |
Katalin Anita Zagyvainé Kiss, Viktor Vastag, Zoltán Gribovszki, Péter Kalicz |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250110011
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| Publikation (Nr.) |
 EGU/EGU2015-9971.pdf |
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| Zusammenfassung |
| By social demands are being promoted the aspects of the natural forest management. In
forestry the concept of continuous forest has been an accepted principle also in Hungary since
the last decades. The first step from even-aged stand to continuous forest can be the forest
regeneration based on gap cutting, so small openings are formed in a forest due to forestry
interventions. This new stand structure modifies the hydrological conditions for
the regrowth. Without canopy and due to the decreasing amounts of forest litter
the interception is less significant so higher amount of precipitation reaching the
soil.
This research focuses on soil moisture patterns caused by gaps. The spatio-temporal
variability of soil water content is measured in gaps and in surrounding sessile oak (Quercus
petraea) forest stand. Soil moisture was determined with manual soil moisture meter which
use Time-Domain Reflectometry (TDR) technology. The three different sizes gaps (G1: 10m,
G2: 20m, G3: 30m) was opened next to Sopron on the Dalos Hill in Hungary. First,
it was determined that there is difference in soil moisture between forest stand
and gaps. Second, it was defined that how the gap size influences the soil moisture
content.
To explore the short term variability of soil moisture, two 24-hour (in growing season)
and a 48-hour (in dormant season) field campaign were also performed in case of the
medium-sized G2 gap along two/four transects. Subdaily changes of soil moisture were
performed. The measured soil moisture pattern was compared with the radiation pattern. It
was found that the non-illuminated areas were wetter and in the dormant season the subdaily
changes cease.
According to our measurements, in the gap there is more available water than under the
forest stand due to the less evaporation and interception loss.
Acknowledgements: The research was supported by TÁMOP-4.2.2.A-11/1/KONV-2012-0004
and
AGRARKLIMA.2 VKSZ_12-1-2013-0034. |
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