Geology Reference
In-Depth Information
Answer 1:
Figure 18 Na/Cl, SO 4 /Cl, K/Mg and Na/SO 4 ratios.
Answer 2: By creating different ratios (Na/Cl, SO 4 /Cl, ...) one can observe
that all of the points measured in brackish water are aligned along a mixing
line between pure seawater (upper right) and karst water (bottom left). In
addition, the Br/Cl ratio in 10 -3 milliequivalents/L is close to 1.51, which
is characteristic of sea salt. A ratio between 0.7 and 1.2 would have meant
the presence of evaporites.
Answer 3: All of this data proves that the salinity of the brackish water is
a result of marine contamination, and that exploitation of the aquifer is
therefore a possibility far from the coast.
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