DBPapers
DOI: 10.5593/SGEM2014/B31/S12.073

QUANTIFICATION OF SUBSTANTIAL SOIL WATER REGIME ELEMENTS DURING IMPORTANT DRY PERIODS

M. Gombos, B. Kandra, I. Vasilova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 563-570 pp

ABSTRACT
The paper presents the results of quantification of substantial soil water regime elements during important dry periods. Soil water regime elements were monitored on East- Slovakian Lowland in the area surrounding Milhostov station (N 48°39,786´; E 21°43,298´). Daily rainfall measured in Milhostov station during years 1961 to 2013 was analyzed. Based on these data, dry periods were identified by their frequency, duration, distribution in time and probability characteristics. In addition, dry periods were identified while daily rainfall was filtered out during years and vegetation periods. Filtered daily rainfall means that the volume of daily rainfall is zero. Low rainfall, up to cca 5mm, is intercepted by field crops interception capacity from physical point of view. Water is evaporated from plant surface and does not come in contact with soil surface. Development of soil water storage up to 1m depth was quantified on daily basis, as well as development of daily cumulative values of actual evapotranspiration and rainfall in selected dry periods. In addition to this, development of groundwater level under the surface and potential evapotranspiration was analyzed. Numerical simulation on GLOBAL model was used for the purpose of quantification. The results are presented in various works which aim to create methods for forecasting water storage development in 3rd water source (unsaturated soil zone) during periods of meteorological drought.

Keywords: dry period, soil water storage, actual evapotranspiration, drought