Characterisation of Weathered and Granitised Fractured Bedrock Aquifer Based on WISH and FC Methods
Keywords:
groundwater hydraulics, Pallisa District, crystalline rocks, granitic fractured rocks, pumping testsAbstract
The hydrodynamic properties of the weathered-fractured layer of a hard-rock in a granitic terrain are characterized using hydraulic tests at different scales in Pallisa District. The WISH and FC methods used required short-duration pumping cycles on an unconfined aquifer with differing seasonal watertable fluctuations. The interpretations of several pumping tests at a site in Pallisa District under various initial conditions provide information on the change in hydrodynamic parameters in relation to water-table level. The transmissivity linearly decreases compared with the available water level, suggesting a non-homogeneous distribution of hydraulic conductivity with depth. The hydraulic conductivity is estimated from the slope of this linear relationship .The extrapolation of the relationship between transmissivity and water level provides an estimate of the aquifer thickness that is in good agreement with geophysical investigations. The hydraulically active part of the aquifer is located in both the shallow weathered and the underlying densely granitic fractured zones of the crystalline basement. It appears that the extension of the most conductive part of the weatheredfractured layer is limited down to 50 metres depth. However, no significant relationship is found between the aquifer storage coefficient and water level. These methods contribute to filling the methodological gap between single pumping test and hydraulic tomography, in providing information on the variation of the regional transmissivity according to depth. They can be applied to any unconfined and semi-confined aquifers that experience seasonal water-table fluctuations and short pumping cycles.
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References
Landers, R. A. and Turk, I. J., (1973): Occurrence and quality of groundwater in crystalline rocks of Llano area, Texas. Groundwater, vol. 11, pp.5-10.
Uhl, V. W. Jr, and Sharma, G. K., (1978): Results of the pumping test in crystalline rock aquifers. Groundwater, vol.16: pp.192.
Ballukraya, P. N., Sakthiyadives, R., and Reddi, B. R., (1987-89): A critical evaluation of pumping test data from crystalline fractured formation. In Gupta, C. P. (eds) Proc. Int. Work. Appropriate methodologies for development and management of groundwater resources in developing countries, Hynderabad, India. Oxford and IBH, New Delhi, vol. 1, pp.37-45.
Singh, V. H., Krishnan, V., Sarma, M. R. K., Gupta, C. P., and Dhar, R. I. (1997): Hydrogeological investigations at CRDIDA farm Hayatnagar, R. R District (A P), India Tech. Rep. No. NGRI-97-GW213:24, Nat. Geophysics Reearch Institute, Hyderabad, India.
Nyende, J., (2007): Groundwater quality and sustainability in granitised fractured aquifers, Pallisa district, eastern Uganda: WIT transaction on Ecology and the Environment, vol. 103, © 2007 WIT press: DOI: 10:2495/WRM070251, ISSN 1743-3541, pp.264-265.
Carter, R.C. (1999) The Impact and Sustainability of community water supply and sanitation programmes in developing countries. Journal, Institution of Water and Environmental Management, vol. 13, pp.292-296.
Omorinbola, E. O., (1984): Groundwater Resources in tropical Africa regolith. Challenges in African Hydrology and water resources (Proceeding of Harare Symposium, July 1984), International Association of Hydrogeologists’ series Publication, No. 144, pp.57-72.
Rural Water and Sanitation (RUWASA), (1996) Water Point Inventory Survey, Pallisa District, Final Report of July.
Clark, L. (1985) Groundwater abstraction from Basement Complex Areas of Africa. Quarterly Journal, Eng. Gell. Vol.18, pp.25-34.
Acworth, R. I., (1987): The development of crystalline basement aquifers in tropical environment.Quarterly Journal of Engineering Geology (London), vol. 20, pp.265-272.
Oppong-Boateng, R. (2001): Assessment of the use of groundwater for irrigation in southern part of Lake Naivasha, Kenya. M.Sc. Thesis, International Institute for Aerospace Survey and Earth Sciences, Enschede (ITC), 36 pp.
Morgan, N. E., (1998): Groundwater chemistry and quality assessment of Lake Naivasha area, Kenya. M.Sc. Thesis, International Institute for Aerospace Survey and Earth Sciences, Enschede (ITC), pp.16.
Nyende, J., (2003): Evaluation of Groundwater Resource Potential of Pallisa District in eastern Uganda, Unpublished MSc. Thesis, Institute for Groundwater Studies, University of the Free State, Republic of South Africa, pp.175.
Tindimugaya, C., (2006): International conference proceedings.
DWRM, (2010): Directorate of Water Resources Management-GIS Department, Entebbe.
Van Tonder, G., Bardenhagen, I., Riemann, K., van Bosch, J., Dzanga, P, Xu, Y., (2002): Manual on
Pumping Test Analysis in Fractured Rock Aquifers. WRC Report No. 1116/1/02. Water research Commission.
Bourdet, D., Whittle, t. M., Douglas, A. A., Pirard, Y. M. (1983): A new set of type curves simplifies well test analyses. Worls Oil. 1983, pp.95-106.
Bardenhargen, I. (2000): Groundwater reserviour characterization based on pumping test curve diagnostic in fractured formation. In: Sililo, O et al., (Eds). Groundwater: Past Achievements and Future challenges. Proceedings of the XXXIAH Congress, Cape Town, South Africa, 26 November-1 December 2000. A. A. Balkema, Rotterdam, pp.81-86.
Van Tonder, G., and Xu, Y., (1999): A guide for the interpretation of the pumping test and estimation of the sustainable yield of boreholes in fractured rock aquifers. Technical Report No.GH3927, Department of Water Affairs and Forestry, South Africa.
Agarwal, R. G., (1980): "A New Method to Account for Producing Time Effect When Drawdown Type Curves are Used to Analyze Pressure Buildup and Other Test Data." SPE Paper 9289, Society of Pet. Engineers, Richardson, Texas.
Van Tonder, G., Kunstmann, H., and Yongxin Xu, (2001): FC Program, Version 3.0, developed at the Institute for Groundwater Studies, University of the Free State, Bloemfontein, South Africa.
Gringarten, A. C., (1982): Flow - test evaluation of fractured reservoirs: Geological Society of America.
Special Paper, vol. 189, pp.237-263.
Kruseman, G. P., and de Ridder, N. A., (2000): Analysis and Evaluation of Pumping Test Data (2nd edncompletely revised). IIRI Publication 47, pp.377.
Theis, C.V., (1935): The relation between the lowering of the piezometric surface and the rate and duration of discharge of well using ground water storage. Transactions of the American Geophysical Union 16:pp.519–524.
Razack, M., and Huntley, D., (1991): Assessing transmissivity from specific capacity in a large and
heterogeneous alluvial aquifer. Groundwater 29(6); pp.856-861.
Hamm, S-Y., Cheong, J-Y., Jang, S., Jang, C-Y, Kim, B-S, (2005): Relationship between transmissivity and specific capacity in the volcanic aquifer of Jeju island, Korea. Korean Journal of Hydrology, 310; pp.111- 121.
Razack, M., and Lasm, T., (2006): Geostatistical stimation of transmissivity in the highly fractured metamorphic and crystalline aquifer. (Man-Danane region, western Ivory Coast) Journal of Hydrology 325(1-4); pp.164-178.
Thomasson, H. G., Olmsted, F. H., Le-Roux, E. F., (1960): Geology, water resources and usable groundwater storage capacity of part of Solano County, California. US Geological Survey. Water supply paper 1464.29. Jacob, C. E., (1947): Drawdown test to determine effective radius of artesian well. Trans-American Society of Civil Engineers, vol 112 (paper 2321); pp.1047-1064.
Jalludin, M., and Razack, M., (2004): assessment of hydraulic properties of sedimentary and volcanic
aquifer system under arid conditions in the republic of Djibouti (Horn of Africa), Hydrogeology Journal, 12(2); pp.159-170.
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