Did you know that the production of any cotton T-shirt you buy requires 2,700 liters of water for its production? This is because cotton farming is the largest consumer of water within the supply chain of the fashion world. But how is it possible to calculate these data and know these results? Thanks to the water footprint indicator. The concept of "water footprint" was included in 2002 as a different indicator and as an alternative of greater complexity than the concept of "water use". Since then, organizations such as UNESCO and the Water Footprint Network have studied various examples of water footprint with the aim of promoting efficient, fair and sustainable use of water. latest advances in knowledge, information and ideas to combat water scarcity. As a strategy to combat water scarcity situations worldwide, numerous organizations cooperate to develop and disseminate knowledge and the importance of the water footprint.
Continue reading this Green Ecologist article to learn about what is the water footprint, its types, examples and how to calculate it.
The water footprint is the term used to indicate the direct or indirect use that humans make of water sweet on the planet. It is an indicator widely used in environmental and sustainability studies to measure the total volume of fresh water that is used in the production of goods and services of a company, or simply, the volume of water consumed directly by an individual or a community.
For this, the water footprint indicator calculates the use of water by the volume of water that has been consumed, evaporated or even contaminated (taking into account whether the calculation is made per unit of time for the index of individuals and communities, or per unit of mass for the case of companies).
We also recommend reading this other Green Ecologist article to learn more about the problem of water misuse, which causes water stress.
Within the different types of water footprint we can differentiate between:
On the other hand, the water footprint is expressed on numerous occasions as colors, so that, depending on the type of water considered, we find:
In addition, this important indicator can be applied both to the group of consumers (individuals, towns, cities, or even nations), as well as to the main producers (public bodies and companies) around the world.
As an example of a water footprint that refers both to the use of water by consumers, as well as by producers, highlights the calculation of the water footprint of food.
In addition, it has become one of the most important water footprints worldwide, due to the alarming amounts of water that are calculated to be necessary for the production of food that we consume in our day to day, such as:
In the next section of this article we will see in detail how the water footprint is calculated to obtain data on the volumes of water that are used in the different food production processes and other goods and services.
For the quantification of the water footprint, the method may vary depending on the type of evaluation (individual consumer, consumer communities, or conversely, small and large-scale producers). Generally, steps to calculate the water footprint are as follows:
Also keep in mind strategies to reduce the water footprint and avoid contamination and waste. You can learn more about water problems and the great importance of taking care of this natural resource in this other post about Why it is important to take care of water.
If you want to read more articles similar to What is the water footprintWe recommend that you enter our Environmental Education category.
Bibliography