Journal
LIMNOLOGICA
Volume 40, Issue 2, Pages 156-160Publisher
ELSEVIER GMBH
DOI: 10.1016/j.limno.2009.12.002
Keywords
Limnology; Precipitation; Evaporation; Lake; Water storage; Mining Lake 111
Categories
Funding
- German Federal Ministry of Education and Research (BMBF)
- Lausitzer und Mitteldeutsche Bergbauverwaltungsgesellschaft mbH (LMBV)
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Several pressure sensors were deployed in a small lake to determine its storage change. It could be shown that a deep enough deployment and an averaging over a time interval of 1 hour and 5 measuring points allowed for a measurement of 1 or 2 kg/m(2) (i.e. 2 mm of water column) of changes in the storage on the scale of the lake size. This accuracy for the lake storage could not be achieved by other methods, especially if conditions were difficult, e.g. snowfall, or in cases when precipitation was small. Finally, the pressure measurement - originally intended to roughly determine the water level - turned out to be a direct measurement of water mass in the lake, which was the proper magnitude for exchanges between atmosphere and lake. Hence the measurement of lake storage could become an interesting approach even for meteorological measurements, such as precipitation and evaporation on a water surface. (C) 2009 Elsevier GmbH. All rights reserved.
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