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06 April 2018 Photo Rulanzen Martin
Researchers to represent UFS at BRICS Summit
From the left: Dr Thulisile Mphambukeli, leader of the BRICS research team that is exploring the political economy of water and food security, and her research partner, Dr Victor Okorie.

A Brazil, Russia, India, China and South Africa (BRICS) delegation is to hold the 10th Annual BRICS Summit in the last week of May 2018 in Johannesburg. Dr Thulisile Mphambukeli, leader of the University of the Free State (UFS) research team alongside Dr Victor Okorie from the Department of Urban and Regional Planning, in collaboration with Prof Lere Amusan of North-West University, will ensure that water and food security is a prominent feature on the gathering’s agenda.
 
First, the project titled: “Exploring the political economy of water and food security nexus in BRICS and Africa” will debut at the National Institute for the Humanities and Social Sciences BRICS Think Tank Forum”.

According to Dr Mphambukeli, the key to water security is attitudinal change by means of education and conscientisation. This, she is adamant about, holds the potential to drive behavioural adjustments in the way society interacts with water.
 
Genetic and social approaches
Dr Okorie asserts that if strides towards reducing the demand for water were to be made, research efforts should be geared towards effecting changes at DNA level. Meaning we need to explore waterwise ways that enable crops and animals to thrive optimally. 

The project also looks at social dimensions of water such as flushing a toilet. “Research activities on redesigning toilets, especially the urinal, where more than nine litres of water are used to flush less than one cubic centimetre of urine, are timely in the context of managing water and the food nexus crises,” said Dr Okorie.

Combining the genetic and social approaches would allow us to produce more with a smaller water footprint. This can be made possible by implementing precision agriculture which is about estimating and applying exact quantities of water and nutrients needed for the production of crops or the raising of livestock.

Paradigm shifting policies
Prof Amusan said the team intended to propose functional solutions that take the quality of water into consideration. Equitable production and distribution of water depends on endorsing policies of co-production between citizens, governments and the public sector. BRICS member states mutually consider water and food security as an issue of paramount significance, hence its feature on this prestigious summit’s agenda.

News Archive

Water erosion research help determine future of dams
2017-03-07

Description: Dr Jay le Roux Tags: Dr Jay le Roux

Dr Jay le Roux, one of 31 new NRF-rated
researchers at the University of the Free State,
aims for a higher rating from the NRF.
Photo: Rulanzen Martin

“This rating will motivate me to do more research, to improve outcomes, and to aim for a higher C-rating.” This was the response of Dr Jay le Roux, who was recently graded as an Y2-rated researcher by the National Research Foundation (NRF).

Dr Le Roux, senior lecturer in the Department of Geography at the University of the Free State (UFS), is one of 31 new NRF-rated researchers at the UFS. “This grading will make it possible to focus on more specific research during field research and to come in contact with other experts. Researchers are graded on their potential or contribution in their respective fields,” he said.

Research assess different techniques
His research on water erosion risk in South Africa (SA) is a methodological framework with three hierarchal levels presented. It was done in collaboration with the University of Pretoria (UP), Water Research Commission, Department of Agriculture, Forestry and Fisheries, and recently Rhodes University and the Department of Environmental Affairs. Dr Le Roux was registered for 5 years at UP, while working full-time for the Agricultural Research Council – Institute for Soil, Climate and Water (ARC-ISCW).

Water erosion risk assessment in South Africa: towards a methodological framework, illustrates the most feasible erosion assessment techniques and input datasets that can be used to map water erosion features in SA. It also emphasises the simplicity required for application at a regional scale, with proper incorporation of the most important erosion-causal factors.

The main feature that distinguishes this approach from previous studies is the fact that this study interprets erosion features as individual sediment sources. Modelling the sediment yield contribution from gully erosion (also known as dongas) with emphasis on connectivity and sediment transport, can be considered as an important step towards the assessment of sediment produce at regional scale. 
 
Dams a pivotal element in river networks
Soil is an important, but limited natural resource in SA. Soil erosion not only involves loss of fertile topsoil and reduction of soil productivity, but is also coupled with serious off-site impacts related to increased mobilisation of sediment and delivery to rivers.

The siltation of dams is a big problem in SA, especially dams that are located in eroded catchment areas. Dr Le Roux recently developed a model to assess sediment yield contribution from gully erosion at a large catchment scale. “The Mzimvubu River Catchment is the only large river network in SA on record without a dam.” The flow and sediment yield in the catchment made it possible to estimate dam life expectancies on between 43 and 55 years for future dams in the area.
 
Future model to assess soil erosion
“I plan to finalise a soil erosion model that will determine the sediment yield of gully erosion on a bigger scale.” It will be useful to determine the lifespan of dams where gully erosion is a big problem. Two of his PhD students are currently working on project proposals to assess soil erosion with the help of remote sensing techniques.

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