Long time monitoring of soil water content changes using time-domain reflectometry

 

Petr Novák, Jiří Dohnal, Zdeněk Jáně, Jaroslav Kněz

Geoscience Research Reports 36, 2003 (GRR for 2002), pages 199–200
Map sheets: Praha (12-24)

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Abstract

This paper deals with an influence of weather conditions on seasonal changes of soil water content. Soil water content was measured by means of time-domain reflectometry (TDR) on a grassy place situated in Albertov area in Prague from February 2000 to February 2003 once a week approximately. Water content was compared with average month temperature and monthly sum of rainfalls (snowfalls). There is a very good correlation between minimal soil water content and the warmest part of a year (from May to October). Water content increases usually at the end of winter (frorn January to March), when snow melts, and in periods of really extreme rainfalls during summer. Transpiration and plant's evapotranspiration play a very important role during the summer period as well.