Fig. 10From: Hydrochemical aspects of high-temperature aquifer storage in carbonaceous aquifers: evaluation of a field studyDevelopment of the sodium ion concentrations during stage 0 (upper left: a) and during stages 1–4 (upper right: b), calcium ion concentrations during stage 0 (middle left: c) and during stages 1–4 (middle right: d) and magnesium ion concentrations during stage 0 (bottom left: e) and during stages 1–4 (bottom right: f). The reservoir water concentration is shown as a green line and the median of the injected tap water as a blue line (25 and 75 % quantile is shown as a dashed blue line). The samples were taken at the bypass (see Fig. 2)Back to article page