SOLUTION 1-30                                       # Fresh pore water and sediment...
 pH 7.27
 Na 0.485; Mg 0.8;  Ca 2.0
 Cl 0.566; C(4) 3.5
EQUILIBRIUM_PHASES 1-30
 Calcite;  CO2(g) -2.0
SAVE solution 1-30
PRINT; -reset false; -status false
END                                                 # Note the END (see text)
EXCHANGE 1-30
 X 0.1; -equilibrate 1
END

SOLUTION 0                                          # 1/3 seawater enters the aquifer...
 pH 8.3
 Na 162; Mg 18.4; Ca 3.6
 Cl 189; Alkalinity 2.4
END

TRANSPORT                                           # 20 yr flow, 5 m/yr, in 150 m...
 -cells 30;               -length 5
 -time_step 3.15e7
 -flow_direction forward; -shifts 20
 -dispersivity 1;         -punch_frequency 20
USER_GRAPH
 -heading dist Na Mg*10 Ca Cl Alk*10
 -init false                                   # -init is shorthand for initial_solutions
 -plot_concentration_vs x
 -axis_titles "Distance / m" "mmol/L"
 -start
 10 graph_x dist
 20 graph_y tot("Na")*1e3, tot("Mg")*1e4, tot("Ca")*1e3,\
            tot("Cl")*1e3, Alk*1e4                   # Note line continuation with \
 -end
END