Graham Jewitt PhD

Professor of Hydrology


Graham Jewitt joined IHE Delft Institute for Water Education as Professor of Hydrology in 2019. Prior to this he was Director of the Centre for Water Resources Research and Umgeni Water Chair of Water Resources Research at the University of KwaZulu-Natal in South Africa. Over the past twenty years, he has led several water and earth system science related initiatives, both in South Africa and abroad, with the relationship between land and water an overarching research thrust. He is on the editorial board of the journals, Hydrology and Earth System Sciences (HESS) and WaterSA, is a member of the management board of Waternet and is active in several other national and international fora. Recent work has been focused on the effective use of science to better inform land and water resources policy development, especially in developing countries, and developing tools to support the effective implementation of these. The nexus between Water, Food and Energy and valuation of water resources with a focus on Nature Based Solutions are current research foci. He has authored or co-authored over 70 journal articles and supervised numerous PhD and MSc students from different parts of the world.



Munishi, S and Jewitt, GPW  (2019) Degradation of Kilombero Valley Ramsar wetlands in Tanzania, Physics and Chemistry of the Earth, Parts A/B/C,

Simpson GB and Jewitt GPW (2019) The Development of the Water-Energy-Food Nexus as a Framework for Achieving Resource Security: A Review.Front. Environ. Sci. 7:8

Saraiva-Okello, AML, Uhlenbrook S, Jewitt GPW, Masih I, Riddell ES, Van der Zaag P (2018)  Hydrograph separation using tracers and digital filters to quantify runoff components in a semi-arid mesoscale catchment. Hydrological Processes. 2018;32:1334–1350.

Mabuku, MP, Senzanje, A, Mudhara M, Jewitt, G and Mulwafu, M. (2018) Rural households’ flood preparedness and social determinants in Mwandi district of Zambia and Eastern Zambezi Region of Namibia, International Journal of Disaster Risk Reduction, Volume 28, 2018, Pages 284-297,

Selala, MS, Thenga, H, Jewitt, GPW and Chaplot, V. (2018) Comparison of the chemical quality of rainwater harvested from roof and surface run-off systems Water SA 44 (2), 223-231

Namugize, JP, Jewitt, GPW and Graham, M (2018) Effects of land use and land cover changes on water quality in the uMngeni river catchment, South Africa, Physics and Chemistry of the Earth, Parts A/B/C, 2018,

Croke, B. and Jewitt, GPW (2018) Special Issue on Water security and the food-water-energy nexus: drivers, responses and feedbacks at local to global scales. Proceedings of the International Association of Hydrological Sciences 376, 1-1

Aduah, MS, Jewitt, GPW  and Toucher, MLW (2017)  Assessing suitability of the ACRU hydrological model in a rainforest catchment in Ghana, West Africa Water Science

Ngcobo, S. and Jewitt, GPW (2017) Multiscale drivers of sugarcane expansion and impacts on water resources in Southern Africa, Environmental Development, 2017, ISSN 2211-4645,

Mander, M., Jewitt, G., Dini, J., Glenday, J., Blignaut, J., Hughes, D., Marais, C., Maze, K., van der Wall, B. & Mills, A. 2017. Modelling potential hydrological returns from investing in ecological infrastructure: Case studies from the Baviaanskloof-Tsitsikamma and uMngeni catchments, South Africa. Ecosystem Services

Gokool, S; Chetty, KT; Jewitt, GPW; Heeralal, A; (2016) Estimating total evaporation at the field scale using the SEBS model and data infilling procedures, Water SA, 42,4,673-683.

Kusangaya, S Toucher, M.L. Warburton; van Garderen, E.; Jewitt, GPW (2016) An evaluation of how downscaled climate data represents historical precipitation characteristics beyond the means and variances,Global and Planetary Change,144,,129-141.

Mengistu, M., J. Steyn, R. Kunz, I. Doidge, H. Hlophe, C. Everson, G. Jewitt and A. Clulow (2016). "A preliminary investigation of the water use efficiency of sweet sorghum for biofuel in South Africa." Water SA 42(1): 152-160.

Hess, T., J. Sumberg, T. Biggs, M. Georgescu, D. Haro-Monteagudo, G. Jewitt, M. Ozdogan, M. Marshall, P. Thenkabail and A. Daccache (2016). "A sweet deal? Sugarcane, water and agricultural transformation in Sub-Saharan Africa." Global Environmental Change 39: 181-194.

Clulow, A., C. Everson, M. Mengistu, J. Price, A. Nickless and G. Jewitt (2015). "Extending periodic eddy covariance latent heat fluxes through tree sap-flow measurements to estimate long-term total evaporation in a peat swamp forest." Hydrology and Earth System Sciences 19(5): 2513-2534.

Malinga, R., L. J. Gordon, G. Jewitt and R. Lindborg (2015). "Mapping ecosystem services across scales and continents–A review." Ecosystem Services 13: 57-63.

Saraiva Okello, A., I. Masih, S. Uhlenbrook, G. Jewitt, P. Van der Zaag and E. Riddell (2015). "Drivers of spatial and temporal variability of streamflow in the Incomati River basin." Hydrology and Earth System Sciences 19(2): 657-673.

Berndes, G., H. Youngs, M. V. R. Ballester, H. Cantarella, A. L. Cowie, G. Jewitt, L. A. Martinelli and D. Neary (2015). "Soils and water [Chapter 18]."

Hughes, D., G. Jewitt, G. Mahe, D. Mazvimavi and S. Stisen (2015). "A review of aspects of hydrological sciences research in Africa over the past decade." Hydrological Sciences Journal 60(11): 1865-1879.

Mutema, M., V. Chaplot, G. Jewitt, P. Chivenge and G. Bloschl (2015). "Annual water, sediment, nutrient, and organic carbon fluxes in river basins: A global meta-analysis as a function of scale." Water Resources Research 51(11): 8949-8972.


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