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20 April 2021 | Story Cornelius Hagenmeier

On 25 May 2021, Africa will celebrate the 58th anniversary of the founding of the Organisation of African Unity (OAU). A central tenet of the organisation, which was the predecessor of the African Union (AU), is African solidarity. This call celebrates the idea and the ideal of African solidarity. As we are preparing for Africa Month 2021, we received the shocking news about the damage to the University of Cape Town’s African Studies collection. The need for African solidarity to mitigate this immense loss has inspired the theme of the 2021 UFS virtual Africa Month celebration, ‘solidarity in knowledge production and recording’.

From the establishment of the OAU and with the later formation of the AU, member states undertook to coordinate and intensify their cooperation and efforts to achieve a better life for the people of Africa.

Africa Day Memorial Lecture

The UFS has a long tradition of commemorating Africa Day and the ideas underpinning it. Every year, diverse events aimed at advancing African unity and solidarity take place during Africa Month –traditionally, the highlight is the Africa Day Memorial Lecture hosted by the University's Centre for Gender and Africa Studies. On 19 May 2021 at 19:00 (SAST), Prof Walter D Mignolo, a guru of decoloniality, will virtually deliver this year’s lecture titled The beauty of the sovereign people: Jean Casimir and the Decolonial History of Haiti, to honour the memory of transatlantic slavery by reflecting on former ambassador, Prof Jean Casimir, who has shifted the geography of reasoning by breaking the code of the standard history of the slave trade, the African diaspora in the Caribbean, and of captive human beings in the plantations. The discussant will be CGAS Extraordinary Professor and Professor of Epistemologies of the Global South at the University of Bayreuth, Prof Sabelo J Ndlovu-Gatsheni.  

As COVID-19 continues to ravage the world, Africans have been fighting against the pandemic in various ways and have achieved considerable success in this regard. Given the economic and social challenges associated with the pandemic, fostering African solidarity and further developing the underpinning philosophy of ubuntu appear to be particularly worthwhile projects.

A virtual celebration of Africa Month

The UFS 2021 Africa Month commemorations will again take a virtual format. It will include a focus on UFS engagement on the continent, partnerships with other African institutions, research excellence, and student success stories.  The UFS invites all members of its community to contribute thought-provoking pieces to this virtual celebration of Africa Month. Selected contributions will be presented on the university's website and social media.

Among other formats, contributions may take the format of

  • recorded performing art performances (e.g., solo music or poetry);
  • virtual visual art presentations;
  • written poetry;
  • songs;
  • short thought/opinion pieces, which can also be published in mainstream media; or
  • topical academic writings.

Please share a brief written proposal explaining your planned contribution by 30 April 2021. The proposal should not exceed 300 words and should be emailed to Cornelius Hagenmeier (hagenmeiercca@ufs.ac.za) or Prof Colin Chasi (ChasiCT@ufs.ac.za).

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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