Determination of water balance components with high precision weighing lysimeter in Kleče

Vesna ZUPANC; Reinhard NOLZ; Peter CEPUDER; Branka BRAČIČ – ŽELEZNIK; Marina PINTAR

doi:10.14720/aas.2012.99.2.14501

Authors

Vesna ZUPANC University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, 1000 Ljubljana, Slovenia
Reinhard NOLZ Institute of Hydraulics and Rural Water Management, University of Natural Resources and Life Sciences, Vienna, Austria
Peter CEPUDER Institute of Hydraulics and Rural Water Management, University of Natural Resources and Life Sciences, Vienna, Austria
Branka BRAČIČ – ŽELEZNIK Drinking Water and Sewerage System Public Utility, Ljubljana, Slovenia
Marina PINTAR University of Ljubljana, Biotechnical Faculty, Jamnikarjeva 101, 1000 Ljubljana, Slovenia

DOI:

https://doi.org/10.14720/aas.2012.99.2.14501

Keywords:

weighing lysimeter, water balance, lysimeter station

Abstract

Components of the basic water balance equation and water balance calculation for July 2011 for weighing lysimeter on water supply pumping station in Kleče, Ljubljana the presented. Lysimeter and outflow mass measured with high precision weighing cells and precipitation as determined from changes in the mass of the lysimeter were used in calculation. Precipitation measurements in the same time resolution as the lysimeter mass measurements would be needed for correct calculation of actual evapotranspiration. In time of high plant water requirements only substantial precipitation events directly contribute to immediate groundwater recharge. The low water retention of the aquifer sediments shows susceptibility of the aquifer to ground water pollution.