Application of Remote Sensing and Geo-Electrical Method for Groundwater Exploration in Khor Al Alabyad, North Kordofan State, Sudan
Remote Sensing technology in this century is widely used in survey and very effective in identification of potential zones for groundwater exploration. In the study area the main rock types are schist, gneisses and quartzite Precambrian terrain of Khor Al Alabyad, Sudan. The main landform units in this area are valley fills lower and upper relief. Occurrence of groundwater in hard rock terrain is mainly controlled by structures, landforms, lithology and recharge conditions. The subsurface column consists of three resistivity layers, which obtained from upper to lower are composed of very dry superficial deposits, followed by an intercalation layer of weathered and fractured basement, then an impermeable hard basement complex respectively. Spectral resolution and geo-electrical resistivity survey has the potential to infer structures as well as lineaments and faults in this hard rock area. It's essential to identify the location of interconnected lineaments below buried channel plains in the hard rock area for targeting subsurface groundwater occurrence is more dependent on fractures. Generally groundwater potential is good in the valley fills and poor in the upper relief, but specifically the target zones are indicated by overlap of the high-intensity lineament contours and low-intensity drainage contours. Therefore, the lineaments can be very helpful in sitting successful wells at zones (C and B) which exhibited a higher lineament density and frequency compared to the other zones.
Remote Sensing, Fractured Basement, Groundwater, Khor Al Alabyad, North Kordofan, Sudan
Ahmed, F.; Andrawis, A. S.; and Hagaz, Y. A. (1984) Land sat Model for Groundwater Exploration in Nuba Mountains, Department of Geology, University of Khartoum, Sudan. Remote Sensing Institute. Brookings, SD, U.S.A.
Carruthers, R.M., 1985, Review of geophysical techniques for groundwater exploration in crystalline basement terrain: British Geological Survey, Regional Geophysics Research Group, Report 85/3, 30 p.
Edet, A. E. (1993). Hydrogeology of parts of Cross River State, Nigeria: Evidence from aero-geological and surface resistivity studies. Unpublished Ph. D Thesis of the Department of Geology, University of Calabar, 350p.
Elhag, A. B. and Elzien, S. M. (2013): Structures Controls on Groundwater Occurrence and Flow in Crystalline Bedrocks: a case study of the El Obeid area, Western Sudan. Global Advanced Research Journal of Environmental Science and Toxicology (ISSN: 2315-5140) Vol. 2(2) pp. 037-046. Available online http://garj.org/garjest/index.htm.
Emenike, E.A. (2001): Geophysical exploration for groundwater in a Sedimentary Environment: A case study from Nanka over Nanka Formation in Anambra Basin, Southeastern Nigeria: Global Journal of Pure and Applied Sciences, v. 7/1, p. 1-11.
Gustafson, P. (1993): High resolution satellite data and GIS as a tool for assessment of groundwater potential of semi-arid area. IX thematic conference on geologic, remote sensing, Pasadena. Calefornia, USA 8 – 11.
GRAS, (2004): The Geological Research Authority of the Sudan (GRAS), URL: http://www.gras-sd.com.
Karuppannan S. (2015): Delineation of Groundwater Potential Zone by Using Geophysical Electrical Resistivity Inverse Slope Method in the Kadayampatty Panchayat Union, Salem District, Tamil Nndu. International Journal of Recent Scientific Research Vol. 6, Issue, 7, pp.5013 – 5017, July, 2015. www.recentscientific.com.
Khalid, A. E. Z., Eiman A. M., Elsheikh M. A. (2014): Detection of possible causes of earthquakes in central Sudan: An integrated GIS approach. International Journal of Geomantic and Geosciences Volume 4, No. 3, 2014.
Telford, W.M., L.P. Geldart, R.E. Sheriff, and D.A. Keys, (1990): Applied Geophysics (Second Edition: Cambridge University Press, p. 344-536. Wilson, A.F., 1922, Geology of the Western Railway: Geological Survey of Nigeria Bulletin, No. 2.