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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

Dr Henry Jordaan’s research to establish benchmarks for sustainable freshwater use in agri-food industries
2014-08-22

 

 Photo: en.wikipedia.org

Dr Henry Jordaan, Senior Lecturer in the Department of Agricultural Economics, is working on a multi-disciplinary research project for the Water Research Commission. The project assesses the water footprints of selected agri-food products that are derived from field and forage crops produced under irrigation in South Africa. These foods include animal products, such as meat and dairy, and crop products such as bread and maize meal.

“The water footprint of a food product is the total volume of freshwater that is used to produce the product, measured from the farm to the actual consumption of the food product. Thus, the water footprint is a good indicator of the impact that the consumption of a product has on our scarce freshwater resource. The agri-food sector is a major user of freshwater in South Africa with a relatively large water footprint,” says Dr Jordaan.

However, the agri-food sector also has an important role in economic development in South Africa. It generates income and employment opportunities along the value chains of the food products.

The challenge is to maximise the economic and social benefits from using freshwater in an environment where freshwater gets increasingly scarce.

Through his research, Dr Jordaan aims to establish benchmarks for sustainable freshwater use in selected agri-food industries – from an environmental, economic and social perspective. These benchmarks will inform water users on the acceptable volumes of freshwater to use to produce food products. It will also inform users of the economic and social benefits that they are being expected to generate through their actions so that their water use behaviour could be considered sustainable.


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