Figure Legends
Fig. 1 Location of sampling sites within the Zuli River
Catchment.
Fig. 2 (a) Annual of total precipitation and mean temperature
and (b) monthly variation of total precipitation in the center of the
Zuli River catchment (data from Huining weather station) (The blue
dashed line refers to annual mean total precipitation in the past 15
years from 2005 to 2019).
Fig. 3 (a) Schematic geological map of the Zuli river catchment
and (b) simplified hydrogeological cross-section along with the
mainstream of Zuli river (topographical profile A-A’ corresponding to
the line in the map (a). The main strata, groundwater flow paths,
recharge, and discharge processes in the catchment were also
schematically marked in the map.
Fig. 4 Cl/Br vs. Cl (a), Cl/Br vs. Na/Cl (b) relationships of
the analyzed water samples. The blue horizontal line marks the Sr/Cl
ratio for seawater. The yellow dashed line in Fig. 4b represents the
halite dissolution line.
Fig. 5 Relationship between87Sr/86Sr vs Sr2+(a); 87Sr/86Sr Vs Sr/Cl (b);
Sr2+ Vs Ca2+ (c) from the analyzed
samples.
Fig. 6 Relationship between δ11B Vs B (a);
B/Cl Vs TDS (b) from the analyzed samples.
Fig. 7 The boron isotopic composition in the analyzed samples.
Data from seawater samples (Barth, 1993) and from non-marine evaporates
(Vengosh et al., 1994) are also indicated.
Fig. 8 Relationship between (Ca+Mg) Vs SO4 (a);
Ca Vs Mg (b) and Sr/Ca Vs. TDS from the analyzed water samples. The dark
dashed line in Fig. 8b represents the dolomite dissolution line.