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23 September 2020 | Story Rulanzen Martin
Prof Mongane Wally Serote said South Africa was created with people from all over who made this their home.

The Centre for Gender and Africa Studies (CGAS) prides itself in creating spaces for intellectual discourse. This was illustrated in a Heritage Day lecture webinar presented by National Poet Laureate, Prof Mongane Wally Serote. The lecture was in collaboration with the University of the Western Cape (UWC) and the Department of Sports, Arts and Culture.

The lecture took place on 23 September 2020. Dr Stephanie Cawood, director of CGAS was the programme director. 

Diversity is our biggest heritage

Prof Serote presented the webinar under the theme Going to Basics: The Reconstruction and Development Programme of the Source. “As South Africans, we came from everywhere and created a home here –- we are the microcosm of the world,” Prof Serote said as he started his lecture. He also said that diversity is the biggest heritage the country has, and that it is a cultural expression emanating from our most complex and difficult history.

The Constitution of our country is a piece of valuable evidence in the commitment to overcome our historical adversities. “Understanding our history seeks to persuade us as a nation, and to understand that change, is constant in the dynamism and dialectics of time,” said Prof Serote. He explained this by saying that, as a nation, we must become masters of knowledge of the constant systems of change and the management thereof.

“Since the outbreak of the coronavirus pandemic, we have quickly arrived at making fundamental changes and transformation,” he said. This is because the world is changing dramatically and very fast. “The biggest and most important lesson is that we dare not forget that humanity is one,” he said.

Social cohesion and nation building a shared responsibility 

As much as the webinar commemorated Heritage Day, it was also a poignant reminder of the role that universities have to place in society at large. “We at the UFS pride ourselves on providing space for debates. This is what we are hosting here today,” said Dr Chitja Twala, Vice-Dean of the Faculty of the Humanities at the UFS.  Dr Twala also said that Heritage Day is one of the milestone days on which “Africans pride themselves”.

The Deputy Minister of Sports, Arts and Culture, Nocawe Noncedo Mafu, referred to Dr Twala’s sentiment, saying that events such as these should be hosted “to foster social cohesion and nation building, which cannot succeed if it remains a project solely and exclusively owned by government”.  Deputy Minister Mafu reiterated that social cohesion and nation building should be a concern for the rest of the society. “I am therefore thrilled with this lecture and notably the partnership with the two universities," she said.

The national theme for Heritage Month 2020 is ‘Celebrating South Africa’s Living Legends.’

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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