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18 August 2025 | Story Somila Nazo | Photo Supplied
Prof Martin Nyaga
Prof Martin Nyaga delivered a keynote on Africa’s scientific leadership in genomics and global health at the African Academy of Sciences Summit in Accra, Ghana.

Prof Martin Nyaga, one of Africa’s foremost experts in genomics and global health, recently delivered a powerful call for Africa’s leadership in global science at the African Academy of Sciences (AAS) Summit in Accra, Ghana. 

As Head of the Next Generation Sequencing (NGS) Unit at the University of the Free State (UFS) and Director of the WHO Collaborating Centre for Vaccine Preventable Diseases Surveillance and Pathogen Genomics, Prof Nyaga urged the scientific community to recognise Africa not just as a participant in global research, but as a driver of innovation and change. 

 

A summit of vision and collaboration 

Themed Unpacking the Pact for the Future: Imperatives for Advancing Scientific Cooperation with Africa, the summit took place from 2 – 4 July 2025. Hosted by the AAS in partnership with the African Union, the Government of Ghana, the University of Ghana, and other global partners, the summit brought together leading scientists, policymakers, and international stakeholders to discuss Africa’s role in shaping the future of global science, research and innovation. 

The event was attended by high-level dignitaries, including the President of Ghana, His Excellency John Dramani Mahama, and the former President of Nigeria, His Excellency Olusegun Obasanjo – a clear indication of strong political will to prioritise science, health and innovation across the continent. 

 

Advancing Africa’s voice in global health 

On 2 July 2025, Prof Nyaga delivered his keynote address, Advances, Opportunities and Priorities for Global Health in Africa. He highlighted Africa’s growing capabilities in genomics and public health, underscoring the opportunities for scientific leadership. 

Following his address, he joined an expert panel with representatives from Tanzania, Ghana and Nigeria to discuss strategies for advancing scientific cooperation in global health. His contributions focused on: strengthening research collaborations; building capacity within Africa; increasing African ownership in health innovations, and enhancing the translation of research into policy and practice. 

Prof Nyaga also used the platform to spotlight the work of the UFS Next Generation Sequencing (UFS-NGS) Unit. As a WHO Collaborating Centre, the unit plays a critical role in pathogen tracking, monitoring vaccine-preventable diseases, and supporting public health preparedness across Africa and beyond. 

 “This engagement provided an opportunity to highlight the impactful research from the UFS-NGS Unit – not only in academic publications, but in demonstrating tangible public health benefits to policy makers,” said Prof Nyaga.  “It elevated the University of the Free State’s standing as a leader in genomic science, while opening new opportunities for collaboration for South Africa and the continent. Our research priorities are increasingly shaping global health and innovation agendas.” 

 

From Ghana to the G20 

The outcomes of the summit will feed into a communiqué to be presented at the 2025 G20 Summit, to be hosted by South Africa. Prof Nyaga’s thought leadership ensures that Africa’s scientific voice - and South Africa’s research priorities - will be represented at one of the world’s most influential multilateral platforms. 

For more information about UFS partnerships in Africa, contact the Office for International Affairs at partnerships@ufs.ac.za.  

News Archive

Water erosion research help determine future of dams
2017-03-07

Description: Dr Jay le Roux Tags: Dr Jay le Roux

Dr Jay le Roux, one of 31 new NRF-rated
researchers at the University of the Free State,
aims for a higher rating from the NRF.
Photo: Rulanzen Martin

“This rating will motivate me to do more research, to improve outcomes, and to aim for a higher C-rating.” This was the response of Dr Jay le Roux, who was recently graded as an Y2-rated researcher by the National Research Foundation (NRF).

Dr Le Roux, senior lecturer in the Department of Geography at the University of the Free State (UFS), is one of 31 new NRF-rated researchers at the UFS. “This grading will make it possible to focus on more specific research during field research and to come in contact with other experts. Researchers are graded on their potential or contribution in their respective fields,” he said.

Research assess different techniques
His research on water erosion risk in South Africa (SA) is a methodological framework with three hierarchal levels presented. It was done in collaboration with the University of Pretoria (UP), Water Research Commission, Department of Agriculture, Forestry and Fisheries, and recently Rhodes University and the Department of Environmental Affairs. Dr Le Roux was registered for 5 years at UP, while working full-time for the Agricultural Research Council – Institute for Soil, Climate and Water (ARC-ISCW).

Water erosion risk assessment in South Africa: towards a methodological framework
, illustrates the most feasible erosion assessment techniques and input datasets that can be used to map water erosion features in SA. It also emphasises the simplicity required for application at a regional scale, with proper incorporation of the most important erosion-causal factors.

The main feature that distinguishes this approach from previous studies is the fact that this study interprets erosion features as individual sediment sources. Modelling the sediment yield contribution from gully erosion (also known as dongas) with emphasis on connectivity and sediment transport, can be considered as an important step towards the assessment of sediment produce at regional scale. 
 
Dams a pivotal element in river networks

Soil is an important, but limited natural resource in SA. Soil erosion not only involves loss of fertile topsoil and reduction of soil productivity, but is also coupled with serious off-site impacts related to increased mobilisation of sediment and delivery to rivers.

The siltation of dams is a big problem in SA, especially dams that are located in eroded catchment areas. Dr Le Roux recently developed a model to assess sediment yield contribution from gully erosion at a large catchment scale. “The Mzimvubu River Catchment is the only large river network in SA on record without a dam.” The flow and sediment yield in the catchment made it possible to estimate dam life expectancies on between 43 and 55 years for future dams in the area.
 
Future model to assess soil erosion
“I plan to finalise a soil erosion model that will determine the sediment yield of gully erosion on a bigger scale.” It will be useful to determine the lifespan of dams where gully erosion is a big problem. Two of his PhD students are currently working on project proposals to assess soil erosion with the help of remote sensing techniques.

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