Investigation of potential for dissolution of carbonate rocksAt Gharehlar area

Category Engineering Geology
Group GSI.IR
Location 21th symposium on geosciences
Holding Date 21 May 2008

   Abstract:
      Occurrence of several cover collapse Sinkhole in the Famennian area (north of Hamedan) has been reported in the last decade. In this area the relatively flat lying Oligo-Miocene carbonate rock are overlain by unconsolidated fluvial sediments. The intensive pumping for domestic and industrial water supply resulted the lowering of ground water levels. Indeed, development of karstic formation was the other cause of these cover collapse sinkholes.
   The aim of this paper is determination the solution rate constant (K) for the Oligo-Miocene carbonate rocks in the Famennian area. The K factor is a function of: 1-the area exposed to solution (A), 2-solubility of the material (Cs) and 3-the concentration of material in solution (C) at time (t).Laboratory studies show that the K factor for the Gharelar area is 4.89*10-6 m/s, which is suitable for development of sinkholes in this area.

General:
     Occurrence of several cover collapse Sinkhole in the Famennian area (north of Hamedan) has been reported in the last decade. In this area the relatively flat lying Oligo-Miocene carbonate rock are overlain by unconsolidated fluvial sediments. The intensive pumping for domestic and industrial water supply resulted the lowering of ground water levels. Indeed, development of karstic formation was the other cause of these cover collapse sinkholes.
   The aim of this paper is determination the solution rate constant (K) for the Oligo-Miocene carbonate rocks in the Famennian area. The K factor is a function of: l-the area exposed to solution (A), 2-solubility of the material (Cs) and 3-the concentration of material in solution (C) at time (t). Laboratory studies show that the K factor for the Gharelar area is 4.89*10-6 m/s, which is suitable for development of sinkholes in this area.

tags: HAMEDAN