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09 July 2021 | Story Dr Nitha Ramnath

Prof Francis Petersen, Rector and Vice-Chancellor of the University of Free State, South Africa, invites us to rethink our relationship with the world in a series of ‘Courageous Conversations’ on the theme of ‘The Global Citizen’. Prof Petersen argues that COVID-19 has been a powerful ‘disruptor’ – it was a stark reminder of the need to rethink our identity, of where we belong, our ‘normative’ view of citizenship – if we want to secure long-term survival of our civilisation and the environments that support it.

Global citizenship and the Sustainable Development Goals – 30 July 2021, 13:00 SAST

Join us for the next Courageous Conversation in the Global Citizen series when Prof Petersen will welcome eminent economist, professor at Columbia University, Director of its Earth Institute, and global leader on sustainability, Prof Jeff Sachs.
 
In 2015, almost all countries signed up to the UN Sustainable Development Goals (SDG). This commitment marked an international solidarity of virtually all countries to work towards the betterment and development of every person on earth. Then COVID-19 struck. Not only did the crisis result in a retrogression of successes registered in achieving the SDG, most notably in the reduction of global poverty, but it also exposed global power disparities.
 
In this session, Prof Sachs will discuss global citizenship and the SDGs in the context of recovery from the COVID-19 pandemic, including what an equitable recovery would mean for countries around the world, and will make reference to the 75th anniversary of the Universal Declaration of Human Rights.

Click Here to RSVP

 
More about our guest

Prof Sachs is widely recognised for addressing complex global challenges such as debt crises, hyperinflation, the control of AIDS, malaria, poverty, and climate change, among a myriad of others.

Sachs serves as the Director of the Center for Sustainable Development at Columbia University. He is President of the UN Sustainable Development Solutions Network, a commissioner of the UN Broadband Commission for Development, and an SDG advocate for UN Secretary General, Antonio Guterres. From 2001 to 2018, Sachs served as Special Adviser to UN Secretaries-General Kofi Annan (2001-2007), Ban Ki-moon (2008-2016), and António Guterres (2017-2018). 


A world-renowned economics professor, bestselling author, innovative educator, and global leader in sustainable development, Sachs was the co-recipient of the 2015 Blue Planet Prize, the leading global prize for environmental leadership. He has twice been named among Time Magazine’s 100 most influential world leaders and has received 34 honorary degrees. A survey by The Economist ranked Sachs as among the three most influential living economists.
 

The Global Citizen Courageous Conversations series

In partnership with the South African Chamber of Commerce based in the United Kingdom, the Global Citizen Courageous Conversations series that was launched on 26 May 2021, brings together powerful voices from public life, intellectuals, public interest and business leaders, academics, naturalists, religious leaders, astrophysicists, economists, ecologists, and others.

Eminent South African business leader, Prof Bonang Mohale, joined Prof Petersen for our first Courageous Conversation on 17 June 2021 to unwrap the role that universities can play in creating a ‘global citizen’ mindset to effect material change in a constantly evolving and turbulent international world.  

If you missed our previous Global Citizen Courageous Conversations, you can watch the replay on YouTube, or visit the South African Chamber of Commerce website for the recordings. 



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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