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24 October 2022 | Story Andrè Damons | Photo Monsoon Photography
Prof Paul Oberholster
Prof Paul Oberholster was one of 29 scholars and scientists that were inaugurated as new ASSAf members in earlier this month (19 October 2022).

Prof Paul Oberholster, Director of the Centre for Environmental Management at the University of the Free State (UFS), is the newest academic from the university to be inaugurated as a member of the Academy of Science of South Africa (ASSAf). 

Prof Oberholster was one of 29 scholars and scientists who were inaugurated as new ASSAf members earlier this month (19 October 2022). At the same time, 10 new members of the South African Young Academy of Science (SAYAS) were inaugurated.

As the official Academy of South Africa, ASSAf honours the country’s most outstanding scholars by electing them to membership of the Academy. ASSAf members are drawn from the full spectrum of disciplines. New members are elected each year by the full membership of the Academy in recognition of scholarly achievement. Members are the core asset of the Academy and give of their time and expertise voluntarily in the service of society. The 29 new ASSAf Members bring the total membership of ASSAf to 659.

Science must be in the service

“I feel very honoured to have been selected as a member of the official national academy of science which represents South Africa in the international community of science academies. I am a strong believer that science must be in the service of society. In all my research, I have shown an interest and determination to bring practitioners, students, and scholars together to pursue and foster the betterment of the human condition through its intimate relation to the natural world. The latter is in strong relationship with the vision and mission of the Academy,” says Prof Oberholster about being included in the academy of science.

This honour comes almost a year after Prof Oberholster won the NSTF-Water Research Commission (WRC) Award for his contribution to water resource management in SA over the past five years, with special reference to the field of biological passive wastewater treatment.

According to him, the ASSAf membership means providing evidence-based scientific advice on water resource issues of public interest to government and other stakeholders. He was nominated by Prof Eugene Cloete, the previous Vice-Rector Research and Innovation at Stellenbosch University for his research focus related to water resource management.

Research has direct impact on the most important resources

Prof Corli Witthuhn, Vice Rector: Research and Internationalisation, says the UFS staff and students are proud of the national recognition that Prof Oberholster received for his lifetime achievements in research on water resource management. His research has direct impact on the managing, protection and rehabilitation of one of the country’s most important resources.  

“The demands on our water supplies will increase in the future as a result of climate change globally. We believe his research will become even more important and relevant in the next decade. We are looking forward to his future achievements and will work with him to provide him with the appropriate UFS support.  Congratulations,” says Prof Witthuhn.

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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