An investigation of the relations between climatological factors and short term variability in groundwater storage and hydrochemistry in till aquifers is performed. The analysis is based on a simple empirical hydrological mode!, the PULSE mode!, and groundwater records from four sites in Sweden.
The mode! proved to be capable of describing the dynamics of groundwater levels or discharge, and at one of the sites it was possible to describe hydrochemical variations as well. The application to the remaining three sites illustrated that groundwater chemistry shows a much more complex pattem of variations than does corresponding streamflow in this type of basin. The importance of areal variabilities within the recharge area is discussed and illustrated by a distribution of the mode! into two submodels when apply- ing it to one of the basins.