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20 March 2018 Photo Pexels
Water footprint important but misunderstood indicator
Water footprinting is the future of water conservation
The Water Footprint (WF) of a product, process or person provides an indication of how much fresh water is used, both direct and indirect, to produce a product, drive the process or lead a lifestyle. Although it is a very important indicator it is often misunderstood. Popular media contribute to this misunderstanding as they often use the WF to illustrate the large quantities of water used to produce a product without explaining what the footprint actually means.  

An example is a single kilogram of beef that has an average global WF 15 415 litres. This indeed sounds scary, but when one places it in context, the total WF includes 14 414 litres green water, 550 litres blue water and 451 litres grey water. Green water is the evapotranspiration of precipitation (rain), blue water is the fresh water from dams, rivers and underground sources, while grey water is the amount of fresh water required to dilute polluted water to acceptable levels.

According to Frikkie Maré, a lecturer at the Department of Agricultural Economics at the University of the Free State (UFS), the WF concept provides a new look at water conservation and sustainability. “Although the WF is not an indicator of sustainable water use, it is a useful tool to calculate total water demand and is used in the estimation of sustainability. Traditionally, water conservation was focused on the direct water use of individuals (time taken to shower, leaking taps etc.), but the WF now provides a tool to focus attention on total water demand.”

The Water Footprint Network assists individuals with this new trajectory on the water conservation front with the personal water footprint calculator that allows individuals globally to determine their personal water demand through their direct and indirect water usage. Maré believes this can cause the necessary paradigm shift in the aqua status quo by creating awareness among consumers on their total water demand.

With Water Week underway from 17-23 March 2018, UFS students and staff members are urged to make use of the personal water footprint calculator in order to become aware of the real importance of fresh water in our everyday lives.

News Archive

Research at the UFS on the acceptability and modern use of earth building in newly settled urban areas can help the poorest of the poor to acquire hou
2003-08-26

The University of the Free State and the Technische Universiteit van Eindhoven in the Netherlands received a research bursary of R316 000 from SANPAD (South African Netherlands Research Programme on Alternatives in Development).

The aim of the research is to determine the public acceptability of sustainable, high quality, earth constructed public and private buildings as an alternative to the conventional way of building with bricks and steel.

“European countries like the Netherlands are far advanced with studies in earth construction and this is why the partnership was formed with the Technische Universiteit van Eindhoven,” says Prof Das Steÿn, Head of Urban and Regional Planning at the UFS and project leader.

Although research regarding mapping, typology and availability of natural and local resources has been done on a national level, little research has been done on the acceptability and the modern use of earth building in newly settled urban areas.

“South Africa has a large housing shortage and traditional methods such as earth building techniques are not used in urban informal housing. Preference is given to corrugated iron sheets and plastic,” says Prof Steÿn.

The use of upgraded earth construction might be more sustainable as far as the environment and the economy is concerned. “If we can make a breakthrough in the development and propagating of these methods it will help the poorest of the poor to acquire housing of a better quality.”

The research team from the UFS consists of Prof Steÿn, Ms Petria Jooste-Smit, Head of the Unit for Earth Construction in the Department of Architecture and Mr Gerhard Bosman of the Department of Architecture.
 

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