Publications of Dr Molla Demlie Bekele

Peer-reviewed Journal articles:

  1. Ndlovu, M and Demlie, M. (2016). Hydrogeological characterization of the Kosi Bay lakes System, north-eastern South Africa. Journal of Environmental Earth Sciences, 75 (19): 1-16. DOI 10.1007/s12665-016-6164-6.
  2. Demlie, M. (2016). Groundwater – Surface water Interaction in the Northern Zululand Coastal Plain South Africa: A Hydrogeological, Hydrochemical and Environmental Isotope Approach. Proceedings of the 42nd IAH Congress, Rome, Italy. Rend. Online Soc.Geol.It., Supp.n.1 al Vol.39. Italian geological Society. DOI:10.3301/ROL.2016.63.
  3. Demlie, M. (2015). Assessment and estimation of groundwater recharge for a catchment located in highland tropical climate using catchment soil-water balance (SMB) and chloride mass balance (CMB) techniques. Journal of Environmental Earth Sciences (74):1137–1150. DOI 10.1007/s12665-015-4099-y.
  4. Demlie, M. and Titus, R. (2015). Hydrogeological and Hydrochemical Characteristics of the Natal Group Sandstone, South Africa. South African Journal of Geology 118(1): 33-44.
  5. Mengistu, H., Tessema, A, Abiye, T., Jia, H., Demlie, M. (2015). Applying Groundwater Flow Numerical Modelling and Environmental Isotope Methods in Integrated Mine Water Management: A Case study from the Witwatersrand Basin, South Africa. Journal of Hydrogeology (23): 533–550. DOI 10.1007/s10040-014-1216-z.
  6. Weitz, J. and Demlie, M. (2015). Hydrogeological System analysis of the Lake Sibayi Catchment, North-eastern South Africa. South African Journal of Geology 118(1): 91-106.
  7. Abiye, T.A., Mengistu, H., Masindi, K. and Demlie, M. (2015). Reply to the comments on the “Discussion of Surface Water and Groundwater interaction in the upper Crocodile River Basin, Johannesburg, South Africa, by Abiye et al. (2015)” by P. Hobbs (2015). South African Journal of Geology 118 (1): 517-518.
  8. Abiye, T.A., Mengistu, H., Masindi, K. and Demlie, M. (2015). Surface water and groundwater interaction in the Upper Crocodile River basin, Johannesburg, South Africa: Environmental isotope approach. South African Journal of Geology 118 (1): 1-10.
  9. Mengistu,H., Tessema, A., Demlie, M., Abiye, T., Roeyset, O. (2015). Surface-complexation modelling for describing adsorption of Phosphate on hydrous Ferric oxide Surface. Water SA 41(1): 157-168.
  10. Mbugua, JM, Ngila, J.C, Kindness, A, Demlie, M. (2014). Application of hydrogeochemical modeling in simulating the transportation of elements in fly ash heap under different disposal systems in South Africa, Physics and Chemistry of the (76–78): 114–123. doi: http://dx.doi.org/10.1016/j.pce.2014.11.011.
  11. Demlie, M. Hingstone, E, Mnisi, Z. (2014). A study of the sources, human health implications and low cost treatment options of iron rich groundwater in the northeastern coastal areas of KwaZulu-Natal, South Africa. Journal of Geochemical Exploration 144: 504-510. DOI: 10.1016/j.gexplo.2014.05.011.
  12. Naicker, S. Demlie, M. (2014). Environmental isotopic and hydrochemical characteristics of groundwater from the Sandspruit Catchment, Berg River Basin, South Africa. Journal of Water Science & Technology (69) 3:601-611. doi: 10.2166/wst.2013.751.
  13. Weitz, J., Demlie, M. (2014). Conceptual modeling of groundwater-Surface water interactions in the Lake Sibayi Catchment, Eastern South Africa. J. Afr. Earth. Sci. 99: 613-624. doi.org/10.1016/j.jafrearsci.2013.11.018.
  14. Mbugua, JM, Ngila, J.C, Kindness, A, Demlie, M. (2014). Reactive-transport modeling of fly ash-water-brines interactions from laboratory-scale column studies. J. Phys. Chem. Earth (67-69):132-139. DOI: 10.1016/j.pce.2013.09.016.
  15. Everson, C., Clulow, A.D., Becker, M., Watsion, A., Ngubo, C., Bulcock, H., Mengistu, M.G., Lorentz, S. and Demlie, M. (2013). The long term impact of Acacia mearnsii trees on evaporation, streamflow, low flows and ground water resources. Phase II: Understanding the controlling environmental variables and soil water processes over a full crop rotation. WRC Report NO. 2022/1/13, Water Research Commission, Pretoria, South Africa. ISBN: 978-1-4312-0516-5.
  16. Mengistu, H., Yibas, B, Diop, S, Alemayehu, T and Demlie, M (2012) Investigation of Phosphatic-Vermiculite-heavy metal interaction and the implications to pollution of Solati River in Limpopo Province, South Africa. In McCullough, Lund and Wyse (Editors). International Mine Water Association (IMWA): 713-721.
  17. Abera Tessema & Haile Mengistu & Emmanuel Chirenje & Tamiru A. Abiye & Demlie, M. (2012). The relationship between lineaments and borehole yield in North West Province, South Africa: results from geophysical studies. Hydrogeology Journal (20): 351–368, DOI 10.1007/s10040-011-0803-5.
  18. Mengistu, H, Roeyset, O, Tessema, A, Abiye, TA and Demlie, M (2012). Diffusive gradient in thin-films (DGT) as risk assessment and management tools in the Central Witwatersrand Goldfield, South Africa. WATER SA 38 (1):15-22.
  19. Jovanovic, N., Israel S., Petersen C., Bugan, R.D.H., Tredoux, G., de Clercq, W.P., Rose, R., Conrad J. and Demlie, M. (2011). Optimized monitoring of groundwater - surface water - atmospheric parameters for enhanced decision-making at a local scale. Water Research Commission, WRC Report NO. 1846/1/11, Pretoria, South Africa. ISBN: 978-1-4312-0125-9.
  20. Abiye, T.A; Mengistu H, and Demlie MB (2011). Groundwater resource in the Crystalline Rocks of the Johannesburg Area, South Africa. Journal of Water resources and Protection (3):199-212.
  21. Ayenew, T., Fihre, S., Wisotzky, F., Demlie, M., and Wohnlich S. (2009). Hierarchical Cluster analysis of hydrochemical data as a tool for assessing the evolution and dynamics of groundwater across the Ethiopian rift. International Journal of Physical Sciences 4(2):76-90.
  22. Ayenew, T., Demlie, M. and Wohnlich, S. (2008). Application of numerical modeling for groundwater flow system analysis in the Akaki catchment, central Ethiopia. Journal of Mathematical Geosciences (40): 887-906.
  23. Ayenew, T., Demlie, M., Wohnlich, S. (2008). Hydrogeological framework and occurrence of groundwater in the Ethiopian aquifers. Journal of African Earth Sciences 52(3): 97-113. (I have contributed towards data collection, data analysis, and interpretation of the results and writing up of the manuscript (30%).
  24. Demlie, M., Wohnlich, S. and Ayenew, T. (2008). Major ion hydrochemistry and environmental isotope signatures as a tool in assessing groundwater occurrence and its dynamics in a fractured volcanic aquifer system located within a heavily urbanized catchment, central Ethiopia. Journal Hydrology 353:175-188.
  25. Demlie, M., Ayenew, T., Wohnlich, S. (2007). Comprehensive hydrological and hydrogeological study of topographically closed lakes in highland Ethiopia: the case of Hayq and Ardibo. Journal of Hydrology 339 (4): 145-158.
  26. Demlie, M., Wohnlich, S., Wisotzky, F., Gizaw, B. (2007). Groundwater recharge, flow and hydrogeochemical evolution in a complex volcanic aquifer system, central Ethiopia. Hydrogeology Journal 15 (6): 1169-1181.
  27. Demlie, M., Wohnlich, S., Gizaw, B., Stichler, W. (2007). Groundwater Recharge in the Akaki Catchment, Central Ethiopia: Evidence from Environmental Isotopes (18O, 2H and 3H) and Chloride Mass Balance. Journal of hydrological processes 21 (6): 807-818.
  28. Demlie, M., Wohnlich, S. (2006). Soil and Groundwater Pollution of an urban catchment by Trace metals: Case study of the Addis Ababa region, central Ethiopia. Journal of Environmental Geology 51 (3): 421-431.
  29. Ayenew, T. and Demlie, M. (2004). Bathymetric Survey and Estimation of the Water Balance of Lake Ardibo, North Ethiopia. SINET: Ethiopian Journal of Science 27 (1):61-68.
  30. Demlie, M. (2001). The Impact of Block Teaching on the Teaching-Learning Process in Higher Education, the case of Mekelle University, Ethiopia. IER. Flambeau, Institute of Educational Research, Addis Ababa University, Addis Ababa. Vol. 9 (1):51-55.

Peer-reviewed published Thesis and Dissertations:

  1. Demlie, M. (2007). Hydrogeology of the Akaki catchment, central Ethiopia: With special emphasis on the problem of groundwater recharge. Bochumer Geowissenschaftliche Arbeiten, Heft 7, ISSN 1619-8050: Ruhr-University Printing Press, Bochum, Germany,151pp.
  2. Demlie, M. (2000). Hydrology, Hydrogeology and Hydrochemistry of the Lakes System Haiq-Ardibo, Northern Ethiopia. Addis Ababa University press, Addis Ababa, Ethiopia, 130pp.

List of Communications:

  1. Demlie, M. and Khoza, D. (2016). A study of the vulnerability of a South African Coastal Plain Aquifer to seawater intrusion using the GALDIT Index method. Paper number 204. Abstract 35th International Geological Congress, Cape Town, South Africa. (http://www.americangeosciences.org/information/igc).
  2. Demlie, M. (2015). Carbon Capture and Storage (CCS) Technical Gaps and Analysis in South Africa: Infrastructure Gaps and Facilities that need to be developed (Invited Oral presentation). SACCCS 4th CCS Conference, 20-21 October 2015, Johannesburg, South Africa.
  3. Ndlovu, M. and Demlie, M. (2015). A Hydrogeological study of the Kosi Bay Lakes System, Northeastern South Africa. Proceeding of the 14th Biennial Groundwater Division Conference and Exhibition, Gauteng, South Africa (Groundwater: From Theory to Action).
  4. Demlie, M., Titus, R. and Ndlovu, N. (2015). Hydrogeology of the Cedarville Flats Primary Aquifer, Upper Umzimvubu River Basin, South Africa. Proceeding of the 14th Biennial Groundwater Division Conference and Exhibition, Gauteng, South Africa (Groundwater: From Theory to Action).
  5. Weitz, J. and Demlie, M. (2015). Comparative Analysis between LAK3 Package and the High-K Techniques used for Numerical Simulation of Lake-Aquifer Interactions in the Lake Sibayi catchment, Northeastern South Africa. Proceeding of the 14th Biennial Groundwater Division Conference and Exhibition, Gauteng, South Africa (Groundwater: From Theory to Action).
  6. Demlie, M.B., M, Ndlovu, M. (2014). A hydrochemical and environmental isotope investigation of Groundwater – Surface water interaction in the Kosi Bay Lakes system, Northeastern South Africa. Proceedings of the 2014 Water Symposium: - Integration: ‘The Final Frontier’. Nov 24-28, Marlborough, New Zealand.
  7. Demlie, M., Hingstone, E, and Zinhile, M (2014). A study of the sources, human health implications and low cost treatment options of high iron groundwater in Northeastern Coastal areas of KwaZulu-Natal, South Africa. Proceedings of the Closing Workshop of the IGCP/SIDA projects 594 and 606: Addressing Environmental and Health Impacts of Active and Abandoned Mines in Sub-Saharan Africa., Prague, Czech Republic, May 26-28, 2014.
  8. Demlie, M and Hingstone, E (2013). A review of Post-Rehabilitation Monitoring of Surface water and Groundwater around Old Coal Mines in Northern KwaZulu-Natal, South Africa. The Third IGCP/SIDA Project 606 Workshop On: Addressing Environmental Health Impacts of Mining in Sub-Saharan Africa through improvements in mitigation and rehabilitation technologies. Institute for Geological and Mining Research, Younde, Cameroon, June 28-29, 2013.
  9. Zwiers, A.S. and Demlie, M. (2013). A Groundwater Vulnerability Assessment of the Greater Pietermaritzburg Region, South Africa. Proceedings of the 13th Biennial Groundwater Conference and Exhibition, Durban South Africa.
  10. Demlie, M, Titus R, and Moodley K (2013). Preliminary investigation of the Hydrogeology of the Natal Group Sandstone, Eastern South Africa. Proceedings of the 13th Biennial Groundwater Conference and Exhibition, Durban South Africa.
  11. Weitz, J and Demlie, M. (2013). Conceptual modeling of Surface water – Groundwater interaction in the Lake Sibayi Catchment, Eastern South Africa. 24th Colloquium of African Geology (CAG24). Addis Ababa, Ethiopia.
  12. Demlie, M and Watkeys, MK. (2011). Hydrochemical and environmental Isotope based study of the thermal springs of KwaZulu-Natal, South Africa. Proceedings of the International Conference on Groundwater: Our source of security in an uncertain future.19-21 September, 2011, Pretoria, South Africa.
  13. Demlie, M, Jovanovic, N, and Naicker, S. (2011) The origin of Groundwater salinity in the Sandspriuts catchment, Berg River Basin, South Africa. Proceedings of the International conference on Groundwater: Our source of security in an uncertain future.19-21 September, 2011, Pretoria, South Africa
  14. Ayenew, T., Wohnlich, S., Demlie, M. (2008). Integrated Groundwater Modeling and Hydrochemical Study in Addis Ababa Area: Towards Developing Decision Support System for Wellhead Protection. International symposium on Coupling Sustainable Sanitation & Groundwater Protection.14-17 October, 2008 Geozetrum Hannover, Germany.
  15. Demlie, M., Ayenew, T., Wohnlich, S. (2008). Estimation of groundwater recharge for a volcanic aquifer catchment located in sub-humid tropical climate: Comparison of results from two non-calibrated recharge estimation techniques. Proceedings of the Symposium on Hydrogeology of Volcanic rocks: Djibouti, 14-17 December: 111-115pp.
  16. Demlie, M., Wohnlich, S. and Ayenew, T. (2007) Groundwater System Analysis in A Fractured Mountain-Front Volcanic Aquifer, Central Ethiopia: Hydrogeological, Hydrochemical and Isotopic Evidences. Proceedings of the Groundwater Conference 2007 organized by the geological Society of south Africa, Bloemfontein, South Africa.
  17. Demlie, M. & Wohnlich, S. (2006). Vulnerability of the volcanic aquifers of the Addis Ababa region to pollution: A study using Environmental isotopes (18O, 2H and 3H) as tracers. In:- Indikatoren im Grundwasser. Tagung der Fachsektion Hydrogeologie in der DGG: Cottbus, 24-28 May 2006, SDGG (Heft 43).
  18. Demlie, M., Wohnlich, S. and Ayenew, T. (2005). A study of the water balance of two topographically closed tropical Lakes in Northeast Ethiopia as a decision Tool for solving water use conflict between Irrigation and Fish Farming (Abstract volume). Deutscher Tropentag 2005, “The Global Food & Product Chain-Dynamics, Innovations, Conflicts and Strategies” Hoehenheim.
  19. Demlie, M. (2004). Present day hydrology of the topographically closed lakes Haiq-Ardibo, northern Ethiopia: System Analysis, Bathymetry and Water balance. 20th Colloquium on African Geology: Orleans, 2-7 June 2004-BRGM.