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16 January 2025 | Story Dr Cindé Greyling | Photo Supplied
Green Futures Hub
Prof Wayne Truter, who is leading the Green Futures Hub at the UFS, highlights that mining and agriculture are important yet competing industries in South Africa. The hub aims to find sustainable ways for them to coexist.

Our earth is very resilient, and a green future is possible, but we must make changes. At the forefront of this mission is the Green Futures Hub, spearheaded by Prof Wayne Truter at the UFS. Prof Truter holds a PhD in Integrated Agricultural and Environmental Sciences, with more than 25 years of experience. He is a leader in the field of forage, pasture, and land regeneration – particularly those impacted by mining. 

The Green Futures Hub is a virtual platform that bridges academic research and industry gaps, aiming to solve real-world challenges with scientific insights. It is designed to showcase and integrate the research happening across various disciplines at the University of the Free State (UFS), making it accessible to industry and communities alike. “People often lose faith in academic institutions, thinking that the research done there has no practical value,” Prof Truter notes. “The Green Futures Hub aims to change that by making scientific findings accessible and relevant to daily life.” 

This platform offers a unique opportunity for industries to connect with researchers working on solutions related to climate change, sustainable agriculture, or environmental rehabilitation. “Our hub is a space where industries can come to us with their challenges, and we can offer solutions based on research,” Prof Truter explains. “It’s about creating real impact.” 

Collaboration and integration are central to the Green Futures Hub’s approach. “Through interdisciplinary collaboration and a commitment to environmental stewardship, we want to develop solutions to the complex development challenges related to ecosystems, agroecosystems, water resources, biodiversity, infrastructure, and communities,” says Prof Truter. 

One of the hub’s projects that is close to Prof Truter’s heart, is the future coexistence of mining and agriculture. Mining and agriculture are two important industries in South Africa, often competing for land. However, the hub seeks to bridge this gap by exploring how these industries can coexist sustainably.  

“The future coexistence of mining and agriculture is critical,” says Prof Truter. “While mining often uses the land intensively, they have the responsibility and capability to rehabilitate it for agricultural use, ensuring that it is as productive – if not more – than it was before. Farmers and miners have much to gain from each other,” he explains. “By partnering with industries, we can help rehabilitate the land that has been mined, and in turn, farmers can harness and bring back the productivity to that land with the financial inputs of mining companies.” 

Prof Truter also emphasises the importance of science communication. “We need to do better at communicating the value of the research we’re doing. Many times, industries don’t understand the significance of what we’re working on because it’s not explained in a way that resonates with them. The hub ensures that research findings are accessible, understandable, and applicable to real-world issues.”  

The Green Futures Hub is more than just a research platform; it is a testament to the power of collaboration between academia and industry. “We’re not just conducting research,” Prof Truter concludes, “we’re developing solutions.” 

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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