ABSTRACT
A basic requirement of artificial recharge is the ability to recover the water. This implies knowledge of the hydraulic connection between recharge area and abstraction area. The residence time in the aquifer is important for the transition to the groundwater quality. Tracer tests were carried out in four water supply areas in glaciofluvial deposits. Different tracers were used in parallel in order to evaluate their applicability for use in artificial recharge. The best results were obtained with chloride, while Na-Naphthionate exhibited degradation or adsorption. Nitrate was also tested and may under certain conditions be an alternative. The results were evaluated for the rate of water recovery, residence times and flow pattern in the aquifer. The results from one of the water supply areas, Jagarbacken, are presented here. The tracer study altered the earlier conception of the hydraulics of the area.
