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05 September 2023 | Story Leonie Bolleurs | Photo Supplied
Prof Lesley Green
Prof Lesley Green was announced the winner of the 2023 ASSAf Humanities Book Award in the category ‘Established Researcher’. She delivered a lecture on her book: Rock. Water. Life: Ecology and Humanities for a Decolonial South Africa.

A group of more than 100 academics and students from universities across South Africa and abroad attended the virtual lecture by Prof Lesley Green, winner of the 2023 ASSAf Humanities Book Award in the category ‘Established Researcher’, who discussed her cross-cutting book, titled: Rock. Water. Life: Ecology and Humanities for a Decolonial South Africa. 

The lecture is part of a series focused on the Humanities Book Awards, offering award recipients a platform to discuss the motivation behind their books, the societal impact of their work, and the personal influences that shaped their text. Prof Reddy said that academics and students can anticipate a series of humanities book award lectures in the coming months. 

Prof Vasu Reddy, Deputy Vice-Chancellor: Research and Internationalisation at the University of the Free State (UFS), member of the Academy of Science of South Africa (ASSAf), and member of the Book Award adjudication panel, facilitated the recent (29 August 2023) online 2023 ASSAf Humanities Book Award Lecture. 

Prof Green, Professor of Anthropology and the Director of Environmental Humanities South (EHS) at the University of Cape Town, was announced the winner of the 2023 ASSAf Humanities Book Award in the category ‘Established Researcher’, for which ASSAf received 31 nominations. She received the award at the end of March this year during a ceremony at the Vineyard Hotel in Cape Town.

The first ASSAf Book Prize was awarded in 2017, and since then ASSAf has conferred the award on an individual every two years to recognise and celebrate the significance and impact of well-written scholarly writings on human knowledge and intellectual efforts in South Africa. 

Prof Reddy characterised Prof Green's specific work as an outstanding book that makes a formidable contribution to the field.

Justice-based environmental sciences 

Prof Green’s research centres on justice-based environmental sciences in South Africa, with a particular focus on the relationship between knowledge and democracy in the Global South – a central theme in her award-winning text.

In the three parts of her book, ‘Past Present’, ‘Present Futures’, and ‘Futures Imperfect’, Prof Green explores the interwoven nature of the past, present, and future. Within these three parts, she delves into the fascinating array of identity markers, inequality, racism, colonialism, and environmental destruction in South Africa. 

Prof Reddy noted that the text asserts a need for environmental research and governance to evolve, contributing to addressing South Africa’s deep history of racial oppression and environmental exploitation. “The book also offers an in-depth engagement of environmental conflict, shedding light on matters often overshadowed by daily concerns in contemporary South Africa,” he added. 

The book, linking the humanities and social sciences with the natural sciences and applied sciences, touched on an array of important topics, including the history of contested water access in Cape Town, struggles over fracking in the Karoo, the call for the decolonisation of science (#ScienceMustFall), land restitution versus the politics of soil, contests over baboon management, and the consequences of sending sewage to urban oceans. 

Prof Green has observed the landscape of environmentalism for a couple of years and noticed a series of struggles. “Typically, these conflicts were being presented in highly polemic ways, often showcasing tremendous tension between academic environmentalism and activists on the ground. I noticed recurring patterns – what was being presented as the preferred form of environmentalism was not something I could support. For example, the frack-free Karoo campaign. It left me quite uncomfortable due to the erasure of Khoi and San presence in the Karoo,” she added. 

“So, what kind of environmentalism could I get behind? Questions around a just environmental governance begin to arise for me.”

Property, #ScienceMustFall, and black environmentalism 

During the discussion, Prof Green shared particular images from each section of her book that caused her to pause and reconsider her stance on the type of environmentalism she could support.

“We inherited a way of thinking about the world that was separated from nature and society. We have challenged that division of nature and society in respect of race and racism and sex and sexism, but we have not brought that critique to bear on how we relate to the world. Somehow, under neo-liberal governance, we find ourselves in this space where economics and finance are seen as the hero that will bring it all together. 

These comments merely scratched the surface of Prof Green’s insights into her book – which Prof John Higgins, Emeritus Professor who formerly held the Arderne Chair in Literature at the University of Cape Town (now Senior Research Scholar at UCT), referred to in his closing remarks as a rich description of a magnificent book. According to him, this scholarly book not only circulates and makes knowledge public, but also provides an opportunity to question that very knowledge. 

This marked the first instance where ASSAf combined book selection with a discussion on the chosen book, underscoring the value of scholarly literature.

- In the Emerging Researcher category, Dr Rick de Villiers from the UFS Department of English was a shortlisted candidate for his book, titled: Eliot and Beckett’s Low Modernism: Humility and Humiliation. 

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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