How fast water moves through the hydrogeochemical system is a crucial information to decide on mitigation measures, groundwater protection strategy and to design a monitoring program (Meals et al., 2010). The catchment typology may provide qualitative estimates of the lag time. For instance, in an overland flow dominated-system, lag time may be “very short” e. g. hours to one day; thus, the effects of mitigation measure can be seen shortly. The lag time can be qualitatively estimated by recharging rate and water age.


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