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15 June 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 has given us 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 which support it.

Powerful voices from public life, intellectuals, public interest and business leaders, academics, naturalists, religious leaders, astrophysicists, economists, and ecologists, and others, will be invited to share and debate their views.

Global Citizen courageous conversation launch
In partnership with the South African Chamber of Commerce based in the United Kingdom, the series launched on 26 May 2021, in a discussion with Prof Petersen on the concept and context of his thinking and how the series will roll out.

If you were unable to join the webinar you can watch the replay on YouTube, or visit the South African Chamber of Commerce website where you'll find recordings of previous webinars.

Join our next Global Citizen conversation on 17 June 2021 with a discussion led by the Chancellor of the University of Free State, Prof Bonang Francis Mohale, a published author and respected business leader who has held chairmanships and directorships at some of South Africa’s top companies, on how we educate for Global Citizenship.

Educating a ‘Global Citizen’ – June 17, 2021 15:00 SAST
We have pleasure in inviting you to the United Kingdom - South African Chamber of Commerce’s next ‘courageous conversation’ with University of Free State Rector and Vice-Chancellor Prof Francis Petersen in his series debating ‘The Global Citizen’.  

Eminent South African business leader and UFS Chancellor, Prof Bonang Mohale, will join Prof Petersen to unwrap the role universities can play in creating a ‘Global Citizen’ mindset to effect material change in a constantly evolving and turbulent international world.  

How do universities produce research, and graduate alumni who go out into the  world, to drive and reflect the bedrock value of Global Citizenship namely that of mutual respect, for others, for all creatures, and the environment which sustains us all?

A university education can be a powerful way to push the ‘reset’ button on the baggage of upbringing and our histories - personal, cultural, national, racial – which shape our world view.  

Universities can promote informed self-reflection, curiosity, and tolerance as a driving force in how we shape our realities, understand our prejudices, promote tolerance, and animate life in a better world.  Prof Petersen and Prof Mohale will reflect on how universities can accelerate and respond with greater agility to this challenge.

Kindly RSVP for the event.

 

 

News Archive

Research helps farmers save with irrigation
2017-02-15

Description: Irrigation research Tags: Irrigation research

Marcill Venter, lecturer in the Department of
Agricultural Economics at the University of the
Free State, has developed the mathematical
programming system, Soil Water Irrigation
Planning and Energy Management in order to
determine irrigation pump hours.
Photo: Rulanzen Martin

Her advice to farmers is that they should make sure they are aware of the total cost (investment and operating costs) of an irrigation system. In most cases the investment cost is low, but the operating cost over the lifetime of the system is high.

“It is very important to have a look at the total cost and to install the most economic system,” says Marcill Venter, lecturer at the University of the Free State (UFS), who has done research on the economic sustainability of water-pipe systems.

Irrigation systems important components for farming
This research comes at a time when many farmers are relying on their irrigation systems due to persistent drought and low rainfall during 2016. South Africa has also experienced an abnormal increase in electricity tariffs in recent years. Due to tariff increases which threaten the future profitability of irrigation producers, the Water Research Commission (WRC) has launched and financed a project on the sustainable management of irrigation farming systems. “I had the opportunity to work on the project as a researcher,” says Venter.

The heart of every irrigation system is the water pipes that bring life to crops and livestock, and this is what Venter’s research is about. “Water pipes are part of the whole design of irrigation systems. The design of the system impact certain factors which determine the investment and operating costs,” she says.

Mathematical system to help farmers
Venter and Professor Bennie Grové, also from the Department of Agricultural Economics at the UFS, designed the Soil Water Irrigation Planning and Energy Management (SWIP-E) programming model as part of the WRC’s project, as well as for her master’s degree. “The model determines irrigation pump hours through a daily groundwater budget, while also taking into account the time-of-use electricity tariff structure and change in kilowatt requirements arising from the main-line design,” says Venter. The model is a non-linear programming model programmed in General Algebraic Modeling System (GAMS).

Design of irrigation system important for sustainability

The main outcome of the study is that the time-of-use electricity tariff structure (Ruraflex) is always more profitable than the flat-rate structure (Landrate). The interaction between the management and design of a system is crucial, as it determines the investment and operating costs. Irrigation designers should take the investment and operating cost of a system into account during the design process. The standards set by the South African Irrigation Institute (SAII) should also be controlled and revised.

Water-pipe thickness plays major role in cost cuts
There is interaction between water-pipe thickness, investment and operating costs. When thinner water pipes are installed, it increases the friction in the system as well as the kilowatt usage. A high kilowatt increases the operating cost, but the use of thinner water pipes lowers the investment cost. Thicker water pipes therefore lower the friction and the kilowatt requirements, which leads to lower operating costs, but thicker pipes have a higher investment cost. “It is thus crucial to look at the total cost (operating and investment cost) when investing in a new system. Farmers should invest in the system with the lowest total cost,” says Venter.

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