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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

NASA Deep Space Navigation engineer presents at Naval Hill Planetarium
2017-03-30

Description: NASA Deep Space Navigation engineer Tags: NASA Deep Space Navigation engineer

From the left: Chris du Plessis; US Consulate, Johannesburg,
Prof Petrus Meintjes; Dept of Physics UFS, Christopher Jacobs;
NASA, and Anthony Deaton; US Consulate Johannesburg.
Photo: Rulanzen Martin

The University of the Free State (UFS) hosted NASA Deep Space engineer Christopher Jacobs on 27 March 2017 at the Bloemfontein Campus. The engagement was hosted by Prof Matie Hoffman of the Department of Physics and the Department of Institutional Advancement, in collaboration with the US Consulate General in Johannesburg.

Jacobs is stationed at NASA’s Jet Propulsion Laboratory (JPL) at the California Institute of Technology and has served as the Reference Frame Calibration task manager for 25 years. In this role he has been responsible for delivering the reference frames used to navigate NASA missions such as the Mars Science Laboratory to planetary targets.

His visit to the UFS included a presentation to the Department of Astrophysics at the Faculty of Natural and Agricultural Sciences and at the Naval Hill Planetarium in Bloemfontein where he spoke on Stellar GPS: Navigating the Solar System. He also spoke about the latest research and developments at NASA in Astrometry. The visit will establish and develop shared interests and possible collaboration with UFS and other institutions of interest in the country. “South Africa, because of its well-placed geographic location in the southern hemisphere, holds a lot of answers to astronomy,” Jacobs said.

He has an active interest in professional and public education, and outreach, having given public lectures around the world. “Astronomy brings people together and is a point of common interest that is key in solving environmental and geographical challenges such as climate change, therefore global cooperation is important,” he said.

Prof Hoffman welcomed the initiative by the US Consulate and the possible outcomes of joint efforts to position the UFS as a key partner in South Africa on NASA’s astronomy projects. In the coming weeks Jacobs will speak at high schools in Gauteng including the Mae Jemison US Science Reading Room in Mamelodi, Pretoria, a centre that is focused on promoting science education.

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