Geophysical and Geological investigation of the Delga proposed Dam Site, Qala Diza, Sulaimani City, Kurdistan Region, NE-Iraq

Authors

  • Bakhtiar Q. Aziz Faculty of Science and Science Education, University of Sulaimani, Kurdistan Region, Iraq. Author
  • Salahalddin S. Ali Faculty of Science and Science Education, University of Sulaimani, Kurdistan Region, Iraq. Author
  • Kamal H. Karim Faculty of Science and Science Education, University of Sulaimani, Kurdistan Region, Iraq. Author

DOI:

https://doi.org/10.17656/jzs.10236

Keywords:

Geophysical and Geological Investigation, Dam Site, Qala Diza

Abstract

The use of two geophysical methods and geological study in the investigation of the geological setting is aimed at evaluating the feasibility of the area for establishing a dam foundation and reservoir. 2D resistivity tomography was conducted on abutments while GPR was used on the river terraces in the trough of the valley. The framework and mutual relations of the geophysics, stratigraphy, lithology, structure, hydrologeology and geotechnique are used to study feasibility of a segment of river valley for dam building. The study is aided by detail and uptodate geological maps and geological cross sections which are all base on field data and geophysical measurements. This proposed dam is located at the southeast Delga village and about 20.0 km upstream of Dokan reservoir on little Zab River and about 19.5 km from the Iraqi-Iranian border. The dam site and surround areas are located in the Imbricated Zone which characterized by southwest overturning of the folds. The dam site is located on one of the overturned syncline in which Shiranish and Kometan Formations are exposed and the foundation and abutments of the dam are located on latter formation. The trend of the dam axis is N80W and the dip of the strata of the Kometan Formation is nearly parallel to the dam axis. This structure relation with dam axis improves water tightness and stability of the dam abutments against sliding and collapse. The 2D resistivity tomography and GPR survey showed that there are underground week zones (cavern and fractured zones) in restricted limited area. The site is water tight as the river descended inside fresh Kometan and Shiranish Formation.

References

-Ajayi O, Olorunfemi MO, Ojo JS, Adegoke-Anthony CW, Chikwendu KK, Oladapo MI, Idornigie AI, Akinluyi F (2005). Integrated geophysical and geotechnical investigation of a dam site on River Mayo Ini, Adamawa State, Northern Nigeria. Afr. Geosci. Rev., 12(3): 179-188.

-Bellen, R. C. Van, Dunnington, H. V., Wetzel, R. and Morton, D. Lexique Stratigraphique International. Asie, Iraq,.(1959), 3c. 10a, 333 p.

-Biswas AK, Charttergee S (1971). Dam Disasters - An Assessment. Eng. J. (Canada), 54(3): 3-8.

-Buday, T. (1980). Regional Geology of Iraq: Vol. 1, Stratigraphy: I.I.M Kassab and S.Z. Jassim (Eds) D. G. Geol. Surv. Min. Invest. Publ. 445p.

-Buday, T., and Jassim, S. Z., (1987). “The Regional geology of Iraq, Tectonism Magmatism, and Metamorphism”. I.I. Kassab and M.J. Abbas (Eds), Baghdad

-Jassim, S.Z. and Goff, J.C. (2006). Geology of Iraq. Dolin, Prague Museun, Berno. 341pp.

-Karim, K.H. and A.m. Surdashy, (2005). Paleocurrent analysis of Upper Cretaceous foreland basin: a case study for Tanjero Formation in Sulaimaniya area, NE-Iraq, Iraqi Journal of Science, Vol. 5, No.1 pp.30-44. DOI: https://doi.org/10.33899/earth.2005.40990

-Karim, K.H. (2004). Basin analysis of Tanjero Formation in Sulaimaniya area, NE-Iraq. Unpublished Ph.D. thesis, University of Sulaimaniya, 135p.

-Karim, K. H., Koyi, H. Baziany, M. M. and Hessami K. (2011). Significance of angular unconformities between Cretaceous and Tertiary y strata in the north western segment of the Zagros fold–thrust Belt, Kurdistan Region, NE Iraq. Geological Magazine, Vol.148, issue, 5l6. P.925-937. DOI: https://doi.org/10.1017/S0016756811000471

-Loke, M.H., and Dahlin T. (2002): A combine Gauss-Newton and Quasi-Newton inversion methods for interpretation of apparent resistivity pseudosections, Paper presented at the 3rd Meeting of the Environmental and Engineering geophysics Society-European Section, Sept. 1997, Aarhus, Denmark.

-Olorunfemi MO, Ojo JS, Sonuga F, Ajayi O, Oladapo MI (2000a) Geoelectrical and Electromagnetic Investigation of the Failed Koza and Nasarawa Earth Dams Around Katsina, Northern Nigeria. J. Mining Geol., 36(1): 51 - 65.

-Olorunfemi MO, Ojo JS, Sonuga F, Ajayi O, Oladapo MI (2000b). Geophysical Investigation of Karkarku dam embankment. Global J. Pure Appl. Sci., 6(1): 117-124. DOI: https://doi.org/10.4314/gjpas.v6i1.16087

Published

2012-12-17

How to Cite

Geophysical and Geological investigation of the Delga proposed Dam Site, Qala Diza, Sulaimani City, Kurdistan Region, NE-Iraq. (2012). Journal of Zankoy Sulaimani - Part A, 15(1), 95-115. https://doi.org/10.17656/jzs.10236