Thermal water · Gata Ilidža spring, borehole SB-1

Water that rises from more than four hundred metres down.

Sulphate and chloride show this is genetically deep water that migrates to the surface through a system of fissures and faults. With a mean annual air temperature of 10 °C and a geothermal gradient of 20 metres per degree, 36 to 37 °C at the spring means a depth of at least 400 metres.

Cross-section: temperature rises one degree every twenty metres of depth; water at 36 to 37 degrees comes from below 400 metres and reaches the surface along faults. 0 m 100 200 300 400 500 600 m 15 °C20 °C25 °C30 °C35 °C 36–37 °C: by the gradient, the spring temperature matches a depth of about 520–540 m the water does not come from less than 400 m water migrating to the surface along faults and fissures SB-1 existing borehole deepening to the primary aquifer Gata, 260–280 m a.s.l. mean annual air temperature 10 °C geothermal gradient: 1 °C per 20 m 400 m · ≈ 30 °C
Schematic section based on the Tuzla Mining Institute studies. The depth scale is real; fault positions are illustrative.
400 m → ≈ 30 °C
  • Water type
    sulphate-chloride-hydrocarbonate, calcium-sodium-magnesium
  • Gas composition
    nitrogen type, with noble gases present
  • Radioactivity
    1,39 – 4,27 MJ
  • Temperature at the spring
    36 – 37 °C, constant across all measurements
  • Bacteriological quality
    all springs and wells compliant in the 1979–1984 studies, some sterile
  • Origin
    deep water from at least 400 m, carrying SO₄ and Cl
  • Planning zone
    energy zone for thermal and geothermal use, parcels 319/1 and 319/2

Balneological indications

  • chronic rheumatic diseases
  • neurological diseases
  • chronic gynaecological diseases
  • musculoskeletal disorders
  • heart and vascular diseases
  • respiratory diseases

Applications

  • baths, tubs, pools and showers
  • drinking cures
  • inhalation
  • peloids (therapeutic mud)
  • energy: district heating of the complex

Temperature regimes

  • 36–38 °Chydrotherapy pools
  • 40–42 °Chot baths and the Jacob pool
A note on borehole SB-1. Bacteriological quality was not tested during drilling because the surroundings were contaminated by surface water used in the drilling process. All earlier analyses were compliant. The current depth is still too small to reach the primary aquifer; deepening is part of phase one.
To add before publishing: yield of the spring and borehole (l/s), current depth of SB-1, status of the thermal water concession, full chemical analysis as an attachment.