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29 May 2018 | Story Rulanzen Martin | Photo Charl Devenish
Africa Day Memorial Lecture explores future of statues
From the left are: Dr Stephanie Cawood, Acting Director of the CGAS; Prof Heidi Hudson, Dean of the Faculty of the Humanities; Prof Prakash Naidoo, Vice-Rector: Operations; and Dr Rahul Rao.

Read Lectures here

Drawing from different international perspectives on the topic of historical statues, the importance of debate surrounding the future of these symbols resounded at the 10th Annual Africa Day Memorial Lecture. 

The lecture was hosted on 23 May 2018 by the newly renamed Centre for Gender and Africa Studies and was presented by Dr Rahul Rao from the SOAS University of London, where he is a senior lecturer in Politics. 

“I am very excited about my trip to South Africa and to be here among you. This is my first trip to South Africa, and it is very exciting and also a little bit emotional for me, particularly because I got my first passport in 1984 when I was six years old, and it said – valid for travel to all countries except the Republic of South Africa. You know why that was the case.”

“I salute all of you for the transformation that has been affected in this country, and I think Africa Day is the perfect occasion to celebrate the transformation.”  

Student activism through #MustFall movements
“I first heard in March 2015 that students from the University of Cape Town have begun demonstrating to take down the statue of Cecil John Rhodes and have it removed from their campus, and a bit later, students from the University of Oxford in the United Kingdom followed suit. At first, I felt some guilt having been a Rhodes Scholar from 2001 to 2004, because you must embody the values of Cecil John Rhodes,” Dr Rao said.

“I have watched from afar the events that have taken place here, for example, the #RhodesMustFall Movement, and the reverberation of these events in other places; I mean, the way these events travel,” he said.

Students in Cape Town, Oxford, and Bloemfontein are doing something concrete and collective to dismantle the legacy of colonialism and Apartheid. “I feel connected to these events, even if I am far away.”

International perspective on historical statues
In both SA and the UK, the call for iconography decolonisation was accompanied and soon overtaken by different accounts. It also gives a broader and different perspective on how statues can be used to achieve racial or social dominance. 

One of the many examples he used, was the ambush against Confederate Statues in the American South. These statues are symbols of upholding a white supremacist ideology in the South. The Confederate States of America was the predecessor to the current United States of America.

He also spoke about the temporalities of statues, the decolonisation and recolonisation, as well as the aesthetics of statues, among other things. “Statues don't need permission to thrust itself upon us. They demand attention,” Dr Rao said. This is because statues are placed in the centre of public spaces but are also vulnerable and exposed. 

He left the audience with some questions on what to do with statues that are taken down, and who to erect new statues for.

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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