Groundwater chemistry: a case study of the Mesta River Basin

The present study describes the hydrochemistry of ground waters found in Mesta River Basin, located south-western part Bulgaria. groundwater’s composition can be expressed as follows: Ca2+ > Na+ Mg2+ K+; K+ equivalent units for cations, and HCO3– SO42– Cl– anions. chemical studied groundwater described calcium-bicarbonate. calcium ions make up from 17.90% to 38.62% (30.18% on average), bicarbonate 35.30% 48.98% (43.70% average) all ions. Taken together, 61.44% 87.60% (73.88% itself is slightly alkaline nature, having pH 7.3 8.6, TDS 67 mg/l 611 mg/l. One sample catchment area was low-mineralized type (TDS = 193 mg/l) water (pH 9.8) Lowlands – Banichan mineral source. sodium-bicarbonate, with sodium making 93.5% 69.6% Out ions, were 48%, 33.86%. sequence following order: K+, CO32–.