Journal Articles

[1] Fourie, F., 2006. Aspects of the lateral and vertical resolution of surface electroseismic data with implications for groundwater exploration in fractured Karoo rocks. South African Journal of Geology, 109 (4), 571-584. DOI: https://doi.org/10.2113/gssajg.109.4.571.

[2] Fourie, F. 2016. Estimating the decant rate from a rehabilitated opencast colliery using a water balance approach. Mine Water and the Environment, 35(2), 199-213. DOI: http://doi.org/10.1007/s10230-015-0362-4.

[3] Oke, S.A., and Fourie, F. 2017. Guidelines to groundwater vulnerability mapping for Sub-Saharan Africa. Groundwater for Sustainable Development, 5, 168-177. DOI: https://doi.org/10.1016/j.gsd.2017.06.007.

[4] Shakhane, T., Fourie, F.D. and Du Preez, P.J. 2017. Mapping riparian vegetation and characterising its groundwater dependency at the Modder River Government Water Scheme. Groundwater for Sustainable Development, 5, 216-228. DOI: https://doi.org/10.1016/j.gsd.2017.07.003.

[5] Sakala, E., Fourie, F., Gomo, M. and Coetzee, H. 2018. GIS-based groundwater vulnerability modelling: a case study of the Witbank, Ermelo and Highveld Coal?elds in South Africa. Journal of African Earth Sciences, 137, 46-60. DOI: https://doi.org/10.1016/j.jafrearsci.2017.09.012.

[6] Kovaleva, E., Huber S., Fourie, F.D., and Pittarello, L. 2018. Comparative study of pseudotachylite microstructures in ma?c and felsic rocks from the Vredefort Impact Structure, South Africa. Implications for the experimental studies. South African Journal of Geology. DOI: https://doi.org/10.25131/sajg.121.0025.

[7] Fourie, F.D., Huber, M.S. and Kovaleva E. 2019. Geophysical characterization of the Daskop Granophyre Dyke and surrounding host rocks, Vredefort Impact Structure, South Africa. Meteoritic and Planetary Science, 54 (7), 1579-1593. DOI: https://doi.org/10.1111/maps.13300.

[8] Shakhane, T., and Fourie, F.D. 2019. An investigation into structural discretisation as a first order and pilot framework to understand groundwater-stream water connectivity at a reach scale. Sustainable Water Resources Management, 5, 883-900. DOI: https://doi.org/10.1007/s40899-018-0267-z.

[9] Sakala, E., Fourie, F.D., Gomo, M. Coetzee, H and Magadaza, L. 2019. Groundwater vulnerability mapping of the Witbank Coal?eld in South Africa using deep arti?cial neural networks. South African Journal of Geomatics, 8 (2), 282-293. DOI: http://dx.doi.org/10.4314/sajg.v8i2.12.

[10] Mukwathi, U., and Fourie, F. 2020. The influence of angled survey lines on 2D ERT surveys using the Wenner (a) array with implications for ground water exploration in Karoo rocks. Journal of African Earth Sciences 168 (2020) 103875. DOI: https://doi.org/10.1016/j.jafrearsci.2020.103875.

[11] Sakala, E., Fourie, F., Gomo, M., and Madzivire, G. 2020. Natural attenuation of acid mine drainage by various rocks in the Witbank, Ermelo and Highveld Coal?elds, South Africa. Natural Resources Research. DOI: https://doi.org/10.1007/s11053-020-09720-5.

[12] Clark, M.D., Kovaleva, E., Huber, M., Fourie F., and Harris, C. 2021. Post-impact faulting of the Holfontein Granophyre Dike of the Vredefort Impact Structure, South Africa, inferred from remote sensing, geophysics, and geochemistry. Geosciences, 11, 96. DOI: https://doi.org/10.3390/geosciences11020096.

[13] Huber, M.S., Kovaleva, E., Clark, M., Riller, U. and Fourie, F. 2022. Long-term crustal relaxation following basin-size impact cratering: evidence from the Vredefort Granophyre Dikes. Icarus 374 (2022) 114812. DOI: https://doi.org/10.1016/j.icarus.2021.114812.

[14] Saveca, P.S.L., Abi, A., Stigter, T.Y., Lukas, E. and Fourie, F. 2022. Assessing groundwater dynamics and hydrological processes from sand river deposits in the Limpopo River, Mozambique. Frontiers in Water 3:731642. DOI: https://doi.org/10.3389/frwa.2021.731642.

[15] Adadzi, P., Allwright, A. and Fourie, F.D. 2022. Multivariate and geostatistical analyses of groundwater quality for acid rock drainage at waste rock and tailings storage site. Journal of Ecological Engineering. 2022;23(12). DOI: https://doi.org/10.12911/22998993/153091.

[16] Fourie, F.D., Huber, M.S., Kovaleva, E. and Clark, M.D. 2023. Shallow depth extent of the Lesutoskraal granophyre dike in the Vredefort impact structure: Geophysical surveys and trenching data. Meteoritic and Planetary Science, 58 (9), 1345-1364. DOI: https://doi: 10.1111/maps.14065.

Conferences (International)

[1] Fourie, F.D. and Botha, W.J., 1995. Modelling the transient response of multiple conductors for the Geonics EM-37 electromagnetic system. In: Proceedings of the 4th technical meeting of the South African Geophysical Association, Victoria Falls, Zimbabwe.

[2] Van Tonder, G., Kunstmann, H., Xu, Y., and Fourie, F, 1999. Estimation of the sustainable yield of a borehole including boundary information, drawdown derivatives and uncertainty propagation. In: Proceedings of the ModelCARE 99 Conference: Calibration and reliability in groundwater modeling. Zurich, Switzerland.

[3] Fourie, F., Botha, J., Grobbelaar, R., and Van Tonder, G, 2000. Application of the electrokinetic sounding technique for geohydrological investigations in a fractured rock aquifer system. In: Proceedings of the XXX^th IAH Congress on Groundwater: Past Achievements and Future Challenges, O. Solilo (eds.). Cape Town, South Africa. ISBN: 978-9058091598.

[4] Fourie, F.D., 2004. Vertical and lateral resolution of surface electroseismic data and the thin bed response. In: Proceedings of the 66th EAGE Conference and Exhibition. Paris, France.

[5] Fourie, F., 2009. The influence of curved and angled survey lines on 2D resistivity surveys employing the Wenner (a) geometry. In: Proceedings of the 11^th SAGA Biennial Technical Meeting and Exhibition. Royal Swazi Sun, Swaziland, September 2009. DOI: https://doi.org/10.3997/2214-4609-pdb.241.fourie_f_paper1.

[6] Fourie, F., 2009. Model studies of the propagation of errors during the inversion of resistivity data recorded with the Wenner (a) geometry along curved and angled survey lines. In: Proceedings of the 11^th SAGA Biennial Technical Meeting and Exhibition. Royal Swazi Sun, Swaziland, September 2009. DOI: https://doi.org/10.3997/2214-4609-pdb.241.fourie_f_paper2.

[7] Steyl, G., Fourie, F.D. and Marais, I.L. 2012. The impact of co-disposal of sulphate brines on a fly-ash dam, a study of the physical-chemical influence on drainage patterns. In: McCullough, C., Lund, M. & Wyse, L. (Eds.), Proceedings of the International Mine Water Association, pp. 661-675. Australia: International Mine Water Association.

[8] Shakhane, T., Fourie, F.D., Vermeulen, P.D. and Van Tonder, G.J. 2012. Hydrogeological concerns about shale fracking in South Africa. 9^th Annual Inkaba Workshop, “Inkaba yeAfrica and Beyond”, Potsdam, Germany, 25-30 November 2012.

[9] Sakala, E., Yibas, B. and Fourie, F. 2014. The use of artificial neural networks in classification of acid mine drainage pollution sources found in Boesmanspruit dam, Carolina, South Africa. In: Proceedings of the Annual International Mine Water Association Conference 2014. Xuzhou, China. ISBN 978-7-5646-2437-8.

[10] Sakala, E., Fourie, F., Gomo, M., Coetzee, H. and Magadaza, L. 2016. Specific groundwater vulnerability mapping: case study of acid mine drainage in the Witbank Coalfield, South Africa. In: Proceedings of the 6^th IASTED International Conference. Gaborone, Botswana, 5-7 September 2016. DOI: https://doi.org/10.2316/P.2016.836-010.

[11] Sakala, E., Fourie, F., Gomo, M., and Coetzee, H. 2016. Analogy of the mineral systems approach with the proposed groundwater vulnerability approach: case study of Witbank-Ermelo-Highveld Coalfields, South Africa. In: Proceedings of the 35^th International Geological Congress, Cape Town, South Africa, 27 August – 4 September 2016.

[12] Sakala, E., Fourie, F, Gomo, M. and Coetzee, H. 2017. Hydrogeological investigation of the Witbank, Ermelo and Highveld Coalfields: Implications for the subsurface transport and attenuation of acid mine drainage. In: Proceedings of the 13^th International Mine Water Association Congress. Lappeenranta, Finland, 25-30 June 2017.

[13] Sakala, E., Fourie, F, Gomo, M. and Coetzee, H. 2017. Mapping surface sources of acid mine drainage using remote sensing: case study of the Witbank, Ermelo and Highveld coalfields. In: Proceedings of the 13^th International Mine Water Association Congress. Lappeenranta, Finland, 25-30 June 2017.

[14] Huber, M., Kovaleva, E. and Fourie F. 2018. Lowermost termination of Vredefort granophyre dyke results in unusual features. In: Proceedings of the 81^st Annual Meeting of The Meteoritical Society. Moscow, Russia, 22 -27 July 2018.

[15] Sakala, E., Fourie, F. and Ramasenya, K. 2019. Groundwater vulnerability as a tool for policy and decision makers: Case study of coalfields of South Africa. In: Proceedings of the China-Africa Water Forum Series 7 – Water Resources Dialogue. Windhoek, Namibia, 22-27 July 2019.

[16] Kovaleva, E., Huber, M., Clark, M. and Fourie F. 2019. Timing of emplacement of Vredefort Granophyre Dykes. In: Proceedings of the Large Meteorite Impacts VI Conference. Brazil, Brazil, 30 September – 3 October 2019.

[17] Huber, M.S., Kovaleva, E., Clark, M. and Fourie, F. 2020. Inferring the emplacement history of Vredefort impact melt dykes. In: Proceedings of the 51^st Lunar and Planetary Science Conference. Texas, USA, 16–20 March 2020.

[18] Huber, M.S., Kovaleva, E., Clark, M.D. and Fourie, F. 2020. Evaluating the emplacement mechanisms of Vredefort impact melt dikes. In: Proceedings of the 11^th Planetary Crater Consortium. Hawai`i, USA, 5-7 August 2020.

[19] Huber, M.S., Gulick S.P.S., Tisato, N., Kovaleva, E., Clark, M. Fourie, F. 2021. Preliminary results of geophysical properties of granites taken from a transect through the Vredefort Impact Structure. In: Proceedings of the 52^nd Lunar and Planetary Science Conference. Virtual conference, 15-19 March 2021.

[20] Saveca, P.S.L, Stigter, T.Y., Fourie, F. and Lukas, E. 2023. Groundwater potential and lateral connectivity of the Limpopo sand river system mitigating water scarcity and salinity in semi-arid Mozambique. In: Proceedings of the 50^th IAH Congress. 18 – 22 September 2023. Cape Town, South Africa.

Conferences (National)

[1] Fourie, F.D., Botha, J.F., 2001. The failure of the sounding assumption in electroseismic investigations. In: Proceedings of the 7^th SAGA Biennial Technical Meeting and Exhibition. Drakensberg Mountains, South Africa. DOI: https://doi.org/10.3997/2214-4609-pdb.143.11.3.

[2] Fourie, F.D., Botha, J.F. and Van Tonder, G, 2002. Information on aquifer elastic parameters and aquifer deformation from the analyses of borehole electroseismic data. In: Proceedings of the GWD Regional Groundwater Conference, Somerset West, South Africa.

[3] Fourie, F.D., 2003. Vertical and lateral resolution of surface electroseismic data and the thin bed response. In: Proceedings of the 8^th SAGA Biennial Technical Meeting and Exhibition. Pilansberg, South Africa. DOI: https://doi.org/10.3997/2214-4609-pdb.144.9

[4] Fourie, F.D., 2005. Investigating the possibility of fracture detection by means of surface electroseismic methods: field survey results. In: Proceedings of the Biennial Groundwater Conference, Groundwater division of the GSSA. Pretoria, South Africa.

[5] Fourie, F., 2007. Limitations of the Helmholtz-Smoluchowski Equation in Electroseismics. In: Proceedings of the 10^th SAGA Biennial Technical Meeting and Exhibition. Wild Coast, South Africa, October 2007. DOI: https://doi.org/10.3997/2214-4609-pdb.146.12.3.

[6] Fourie, F., 2007. Geotechnical Application of a 2-D Resistivity Survey: Mapping Bedrock Elevation for Bridge Construction. In: Proceedings of the 10^th SAGA Biennial Technical Meeting and Exhibition. Wild Coast, South Africa, October 2007.

[7] Fourie, F., 2011. Using electrical resistivity tomography to image grikes in the Gemsbokfontein dolomitic groundwater compartment. In: Proceedings of the GeoSynthesis Conference. Cape Town, South Africa, August 2011.

[8] Fourie, F.D. 2013. Estimating the water make of a rehabilitated opencast coal mine in Mpumalanga. In: Proceedings of the 13^th Biennial Groundwater Division Conference and Exhibition, Durban, South Africa, September 2013.

[9] Shakhane, T. and Fourie, F.D. 2013. Using electrical resistivity tomography to describe the aquifer architecture linked to groundwater and surface water interaction. In: Proceedings of the 13^th Biennial Groundwater Division Conference and Exhibition, Durban, South Africa, September 2013.

[10] Shakhane, T. and Fourie, F. 2014 Quantifying groundwater-surface water exchange fluxes based on steady state riparian area aquifer water balances. In: Proceedings of the 10^th Annual Inkaba yeAfrica and !Khure Africa Conference. Matjiesfontein, South Africa, 29 September – 3 October 2014.

[11] Makhokha, D. and Fourie, F. 2014. A systematic approach to the interpretation of conductivity anomalies recorded with the Geonics EM34-3 electromagnetic instrument across intrusive dolerite dykes and sills in the Karoo Supergroup. In: Proceedings of the 10^th Annual Inkaba yeAfrica and !Khure Africa Conference. Matjiesfontein, South Africa, 29 September – 3 October 2014.

[12] Mokoae, C., Molaba, L. and Fourie, F. 2014. An investigation of possible augmentation of municipal water from groundwater resources of Mangaung. In: Proceedings of the 10^th Annual Inkaba yeAfrica and !Khure Africa Conference. Matjiesfontein, South Africa, 29 September – 3 October 2014.

[13] Fourie, F. 2014. Estimating the decant rate at a rehabilitated opencast colliery where net groundwater inflow occurs. In: Proceedings of the 10^th Annual Inkaba yeAfrica and !Khure Africa Conference. Matjiesfontein, South Africa, 29 September – 3 October 2014.

[14] Mokoae, M.C., Molaba, L.G., van der Merwe, J. and Fourie, F.D. 2015. Investigating the potential of using groundwater associated with a ring-dyke to augment the municipal water supply to Bloemfontein. In: Proceedings of the 14^th Biennial Groundwater Division Conference and Exhibition. Muldersdrift, South Africa, 21-23 September 2015.

[15] Haumann, J.W. and Fourie, F.D. 2015. Investigating the impact of fertilizer effluent disposed in quarries on groundwater quality. In: Proceedings of the 14^th Biennial Groundwater Division Conference and Exhibition. Muldersdrift, South Africa, 21-23 September 2015.

[16] Makhokha, D. and Fourie, F. 2015. A systematic approach to the interpretation of conductivity anomalies across intrusive dolerite dykes and sills in the Karoo Supergroup. In: Proceedings of the 14^th Biennial Groundwater Division Conference and Exhibition. Muldersdrift, South Africa, 21-23 September 2015.

[17] Shakhane, T. and Fourie, F.D. 2015. Quantifying groundwater-surface water exchange fluxes based on the steady state riparian aquifer water balance. In: Proceedings of the 14^th Biennial Groundwater Division Conference and Exhibition. Muldersdrift, South Africa, 21-23 September 2015.

[18] Fourie, F.D., and Vermaas, S. 2017. Using TLERT Surveys and Infiltration Tests to Characterise the Unsaturated Zone and Assess the Groundwater Recharge Potential. In: Proceedings of the 15^th SAGA Biennial Conference and Exhibition, Somerset West, South Africa, 10 – 13 September 2017.

[19] Sakala, E., Fourie, F., Chirenje, E., Saeze, H. and Sekiba, M. 2017. Towards automation of modelling of geophysical data using artificial intelligence. In: Proceedings of the 15th SAGA Biennial Conference and Exhibition, Somerset West, South Africa, 10 – 13 September 2017.

[20] Mokitlane L, and Fourie, F. 2017. Investigating the potential impacts of bentonite mining at Matsopa Mine on the groundwater system. In: Proceedings of the 14^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, October 2017.

[21] Mokgatle, T., and Fourie, F.D. 2017. Groundwater exploration in the Tsineng Area, Northern Cape, using airborne and ground geophysical methods. In: Proceedings of the 15^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[22] Ngoie, S., and Fourie, F.D. 2017. Development of an artificial neural network for the prediction of mine dewatering. In: Proceedings of the 15th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[23] Lourens, M., and Fourie, F.D. 2017. Establishing a groundwater baseline for unconventional gas projects in South Africa. In: Proceedings of the 15^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[24] Vermaas, S., and Fourie, F.D. 2017. Evaluating the recharge potential of an aquifer through the characterisation of the unsaturated zone by means of infiltration studies. In: Proceedings of the 15^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[25] Fourie, F.D., Allwright, A.J., Makiwane, N, and Govender, N. 2017. Characterisation and protection of deep aquifers in South Africa: Consolidation of data sources. In: Proceedings of the 15^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[26] Fourie, F.D., Allwright, A.J., Makiwane, N, and Govender, N. 2017. Characterisation and protection of deep aquifers in South Africa: Characterisation. In: Proceedings of the 15^th Biennial Groundwater Division Conference and Exhibition. Stellenbosch, South Africa, 14-18 October 2017.

[27] Mazibuke, C. and Fourie F. 2019. Estimating hydraulic conductivities through the measurement of streaming potentials. In: Proceedings of the 16^th Biennial Groundwater Division Conference and Exhibition. Port Elizabeth, South Africa, 14-18 October 2017.

[28] Muhkwathi, U. and Fourie F. 2019. The impact of angled survey lines on ERT data recorded with the Wenner (a) array. In: Proceedings of the 16^th Biennial Groundwater Division Conference and Exhibition. Port Elizabeth, South Africa, 14-18 October 2017.

[29] Sekiba, F.M.A., Fourie, F. and Sakala, E. 2019. Airborne and ground geophysical surveys to investigate the deep geology and geohydrology in the Beaufort West area, Western Cape, South Africa. In: Proceedings of the 16^th Biennial Groundwater Division Conference and Exhibition. Port Elizabeth, South Africa, 14-18 October 2017.

[30] Fourie F., Kovaleva, E. and Huber, M. 2019. Geophysical surveys across the Daskop Granophyre Dyke. In: Proceedings of the 17^th SAGA Biennial Conference and Exhibition, Durban, South Africa, 6-9 October 2019.

[31] Mlambo, F.S.S. and Fourie, F.D. 2022. The determination of in-situ hydraulic conductivity in core boreholes intersecting fractured rock at mine sites. In: Proceedings of the IAH-SA Virtual Conference, 13-15 September 2022.

[32] Haumann, J.W. and Fourie, F.D. 2022. Using forward and inverse modelling to investigate the capability of two-dimensional electrical resistivity tomography to detect water-bearing zones in the subsurface. In: Proceedings of the IAH-SA Virtual Conference, 13-15 September 2022.

[33] Kolobe, L.T. and Fourie, F.D. 2022. Appraisal of geophysical methods used for groundwater exploration in South Africa. In: Proceedings of the IAH-SA Virtual Conference, 13-15 September 2022.

[34] Govender, N. and Fourie, F.D. 2022. Evaluating the results of geophysical surveys conducted in the Main Karoo Basin from a geohydrological perspective. In: Proceedings of the IAH-SA Virtual Conference, 13-15 September 2022.

[34] Govender, N. and Fourie, F.D. 2022. Evaluating the results of geophysical surveys conducted in the Main Karoo Basin from a geohydrological perspective. In: Proceedings of the IAH-SA Virtual Conference, 13-15 September 2022.

[35] Fourie, F.D. 2022. Forward and inverse 2D ERT modelling to investigate the depth extents of the granophyre dykes in the core of the Vredefort Impact Structure. In: Proceedings of the 17^th SAGA Biennial Conference & Exhibition, Sun City, South Africa, 28 November-01 December 2022.

[36] Fourie, F.D. 2022. Forward and inverse 2D ERT modelling to investigate the effect of dyke thickness on the resolvable depth extent of resistive dykes of limited depth extent. In: Proceedings of the 17^th SAGA Biennial Conference & Exhibition, Sun City, South Africa, 28 November-01 December 2022.

[37] Clark. M., Kovaleva, E., Huber M. and Fourie, F. 2023. Emplacement dynamics of impact melt dikes: evidence from the Lesutoskraal Pavement, Vredefort, South Africa, derived from high-resolution unmanned aerial vehicle orthophotography. In: Proceedings of the Geocongress 2023, Stellenbosch, South Africa, 11-13 January 2023.

Symposiums (National)

[1] Fourie, F.D. & Venter, A. 2013. Domestic Rainwater Harvesting, Use and Re-Use: Examples from South Africa and Guatemala. In: Proceedings of the 1^st African Water Symposium, Bloemfontein, South Africa, June 2013.

[2] Fourie, F.D. and Venter, A. 2013. Water use strategies to mitigate the impacts of climate change on small towns in South Africa. In: Proceedings of the 1^st Small Town Symposium, Bloemfontein, South Africa, November 2013.

Research Reports

[1] Fourie, F.D., Allwright, A.J., Esterhuyse, S., Govender, N. and Makiwane, N. 2020. Characterisation and protection of potential deep aquifers in South Africa. Report to the Water Research Commission, Pretoria, South Africa. Report No. 2434/1/19. ISBN 978-0-6392-0141-2.