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03 February 2022 | Story NONSINDISO QWABE | Photo UFS Photo Archive
Prof Rodwell Makombe, Associate Professor in the Department of English on the Qwaqwa Campus.

Prof Rodwell Makombe, Associate Professor in the Department of English on the university’s Qwaqwa Campus, will be joining a prestigious group of more than 100 academic staff from African universities for this year’s University of Michigan African Presidential Scholars (UMAPS) programme.

Each year, the programme hosts more than 180 academics from different universities in Africa for a five-month fellowship, providing academics with access to the university’s research libraries and facilities, on-campus housing, health insurance, and a stipend to cover living expenses.

Fellowship an opportunity for collaboration and career growth 
 
The fellowship comes at just the right time for Prof Makombe, who said he is looking forward to mentorship for his growth and career development in a new environment and atmosphere. “I am very excited about this opportunity, which I think has come at the right time. It will expose me to a broad network of scholars, which I need for collaboration purposes, and it will also give me an opportunity to share my research and learn from the experiences of other scholars from different parts of the world. Given that I will be working closely with a faculty member of the university for the duration of the fellowship, the programme will also provide me with the mentorship that I need for my growth and career development.”
 
Apart from the exposure to broad academic and research scholars, he said he was looking forward to having the time and resources to finish writing his second book.

“I have just published my first book in October 2021, and I have already started doing research for my second book. The fellowship will give me time and space to focus on writing the book without the usual interruptions associated with my teaching responsibilities. The book focuses on cultures of resistance in post-Mugabe Zimbabwe. It is a sequel to my recent book,Cultural texts of resistance in Zimbabwe: Music, Memes, Media, which explores discursive resistance in Zimbabwe in the context of crisis.”

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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