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| Titel |
Large-scale lysimeter site St. Arnold, Germany: analysis of 40 years of precipitation, leachate and evapotranspiration |
| VerfasserIn |
N. Harsch, M. Brandenburg, O. Klemm |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 3 ; Nr. 13, no. 3 (2009-03-11), S.305-317 |
| Datensatznummer |
250011796
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| Publikation (Nr.) |
 copernicus.org/hess-13-305-2009.pdf |
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| Zusammenfassung |
This study deals with a lysimetrical-meteorological data series collected on
the large-scale lysimeter site "St. Arnold", Germany, from November 1965
to April 2007. The particular relevance of this data rests both upon its
perdurability and upon the fact that the site is comprised of a grassland
basin, an oak/beech and a pine basin.
Apart from analyzing long term trends of the meteorological measurements,
the primary objective of this study is to investigate the water balance in
grassland and forested basins, in particular comparing the precipitation
term to leachate quantities and potential and actual evapotranspiration. The
latter are based upon the Penman and the Penman-Monteith approaches,
respectively.
The main results of this survey are that, on a long-term average, the
grassland basin turns more than half (53%) of its annually incoming
precipitation into leachate and only 36% into water vapour, while the
deciduous forest exhibits a ratio of 37% for leachate and 56% for
evapotranspiration, and the evergreen coniferous forest shows the highest
evaporation rate (65%) and the lowest leachate rate (26%).
Concerning these water balances, considerable differences both between
basins and between seasons stand out. While summer periods exhibit high
evapotranspiration rates for the forests and moderate ones for the
grassland, winter periods are characterised by considerable leachate
quantities for grassland and the deciduous forest and moderate ones for the
coniferous forest. Following the analysis of the climatic development in St. Arnold,
trends towards a milder and more humid regional climate were
detected. |
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