Geochemistry of Regional Groundwater Flow In the Aladag Karstic Aquifer, Eastern Taurids-Turkey: Effect of Flow Conditions

Geochemistry of Regional Groundwater Flow In the Aladag Karstic Aquifer, Eastern Taurids-Turkey: Effect of Flow Conditions

The geochemistry of regional groundwater flow along the Aladag karstic aquifer indicates a remarkable correlation between the hydraulic and geochemical conditions. The Aladag karstic aquifer. in between the recharge area and the regional ero­ sion base. comprises unconfined and confined sections. A transition zone along which semi-comfined flow conditions dominate also occurs between these sections. The parts of the aquifer in which unconfined and confined flow conditions dominate seem to be anal· ogous of geochemically open and closed systems of carbonate dissolution. respectively. The varition of physical and chemial proper­ ties of the karstic effluents implies that although the carbonate dissolution is perpetual along the flow system. dissolution rates decrease where confined flow conditions start to prevail. However. gypsum dissolution allong the regional flow path seems to be independent of hydraulic conditions.

___

  • Appelo. C.A.J. and Postma. D.. 1992. Groundwater. Geochemistry and Pollution. Vrije Universiteic. Amstertam . 51Op.
  • APHA. AWINA and wPCr. 1989. Standard Methods for the Analysis of Water and Waste Water: APHA Publication. 1015th Street. N. w.Wash­ ington D.C. 2005.
  • Ayhan. A.. 1988. Geological Map of Turkey Senes. Kozan ..i21 Plate­ MTA Publication. Ankara. 12p. (in Turkish).
  • Back. W. and Lesser. J.M.. 1981. Geochimcal wnstraints of groundwa­ ter management m the Yucatan Peninsula. Mexico: J. Hydrol.. 51. pp. 119-13:>.
  • Back. W. Cherry. R.N. and Hanshaw. B.B.. 1982. Chenical equilibnum between water and minerals m carbonate aquifers: (translated bY: G. Aac1k). DSI Teknik B1Jlteni.50. s. 37-41. (in Turkish).
  • Back. W.. Hanshaw. B.B.. Plummer. N.L. Rahn. P.R. and Rightmire. 1983. Process and rate of de·dolomit1zation: Mass transfer and C-14 dating in a regional carbonate aquifer: Geel. Soc. Am. Bull.. 94. pp. 11J 15 1Ll29.
  • Bayan. C.S.. 1991. Karst hydrogcological investigation of the Lower Zamant1 Basin (Aladalar): Ph. D. Thesis. Hacettepe University. lnslitute of Pure and Applied Sciences. t 64p. (Unpublished. abstract in English).
  • Bayan. C.S. and Denizman. C.. 1993. Preliminal)' hydrogeologtc evalua­ tion of the travertine-depositing karst1c springs 1n the Lower Zamant1 Basin. Eastern Taurids. Turkey· Geosound. Bull. of Depts. of Geological and Mining Engmeenngm. <;:ukurova University.22. pp. 95-110.
  • Bayan. C.S. and G(irer. I. 1993. Use of hydrochemical andisotopic techniques m the 1dent1flcat1on of karst groundwarer flow patterns in the Lower Zamant1 Basin:OOCA. Turkish J. Earth. Sci.. 2. pp. 37-47.
  • Bogh. A.. 1980. Kare• Hydrology and Physical Speleology (rranslated ryy c. Sch1mld). Springer-Verlag. Berlin. 284p.
  • Buhmann. D.. and Dreybrodt. W.. 1985. The kinetics of calcite dissolu tion and prec1p1tatt0n m geologically relevant s1tuati0ns of karst areas: Chemical Geology. 48. pp. 189 211.
  • •ord. D.C. and W1lhams. P.. 1989. Karst Geomorphology and Hydrol­ ogy. Unwin Hyman Publ.. Boston. 601p.
  • Gunay. G. and Bayan. C.S.. 1991. Isotope survey of the Lower Zamant1 Basin: HU-IAEA Prcyect. Progress Report no. 2. Int. Res. and Applic. Center for Karst Water Resources. Ilacettepe University. Ankara. 31p.
  • Hanshaw. B.B.. Back. w. and Deike. R.G.. 1971. A geochemical hypothesis for dolomitization by groundwater: Economic Geology. 66.. pp. 710-72.ll.
  • Hanshaw. B.B. and Back. W.. 1979. Major geochemical processes in the evolution of carbonate aquifer system: J. Hydrol.. 43 . pp.287-312.
  • Hem. J.D.. 1985. Study and Interpretation of the Chemical Characteris­ tics of Natural Water: USGS Water Supply Paper 2254. 263p.
  • Lawrance. A.R .. Lloyd. J.W. and Marsh. J M.. 1976. Hydrochemistry and groundwater mixing 1n part of the Lincolnshire limestone aquifer. England: Ground Water. 14. pp.320 328.
  • Parthurst. D.L. Thorstenson. D.C. and Plummer. LN.. 19!Xl. PHREEQE. A computer progrem for geochemical calculations: USG.5 Water Resources Investigations 00-96. US Government Printing Office. Wash­ ington. 195p.
  • Plummer. L.N. and Back. W.. 1980. The mass balance approach: appli­ cation of interpreting the geochemical evolution of hydrologic systens: Am. J. Sci.. 280. pp. 130-142.
  • Plummer. L.N.. BusbY. J.F.. Lee. R.W. and Hanshaw. B.B.. 1990. Geo­ chemical modeling of the Madison aquifer in parts of Montana. Wyo­ ming and South Dakota: Water Resour. Res.. 26i-pp. 1981-2014
  • Stumm. w. and Morgan. J.J.. 1981. Aquatic Chemistry: John Wiley and Sons Inc.. 780p.
  • Tekeli, 0.. AkSay. A.. Ertan-Evren. I.. l 1k. A. and Urgon. M.B.. 1981. Taurus ophiolite projects. Alada{llar: MTA Archive no. 6976. Ankara. 132p. (Unpublished. in Turkish).
  • Tekeli.0.. Aksay. A. and Orgun. B.M.. 1987. Geological Map of Turkey Series. Kozan M34 Plate. MTA Publication. Ankara.21p.(in Turkish).
  • Wigley. T.M.L and Plummer. L.N.. 1976. Mixing of carbonate waters: Geochim. Cosrnochim. Acta. 40. pp.989-995.
  • Wigley. T.M.L.. 1973. The incongruent solution of dolomite: Geochim. Cosmochim. Acta. 37. pp. 1397-1420.