Water footprint is a term used to describe a product total use of water to produce and consume it. Using a product lifecycle approach were all the steps in the production is measured for the use of water, both directly and indirectly volume of water is calculated. The direct water usage is the volume used in processing , washing, cleaning of a final product such as when you buy a new pair of jeans. The indirect usage is all the water consumed throughout the supply chain to grow cotton to make fibres for weaving and colouring the denim, sewing and finishing etc. Therefore, Indirect water usage is very important because it considers the hidden or ‘virtual’ water that is needed to produce goods and services. Commonly indirect water usage is considerably larger than direct use because it includes water-intensive processes such as irrigation of crops. There are many websites that has already made global averages for products across their whole life cycle. The most important element to know regarding how a global average volumes of water are calculate is that they are a sum of three components; blue, green and grey water footprint.
- blue water footprint measures water consumed from ground and surface water sources such lakes, rivers and reservoirs
- green water footprint measures the soil such as rainwater
- grey water footprint is the water necessary to dilute pollutants (fertilizers nitrogen), so the quality remains at tolerable standard.
Water footprint is a quite useful tool for consumers to understand how much water it actually takes to produce everyday products and services. The important factor is to know where it is produced because it takes a much higher level of energy if the water is taken from a region with water shortage. This is the true cost of water.
Blue water footprint
- Blue water footprint measures water consumed from ground and surface water sources such lakes, rivers and reservoirs
Green water footprint
- Green water footprint measures the soil such as rainwater
Gray water footprint
- Gray water footprint is the water necessary to dilute pollutants (fertilizers nitrogen), so the quality remains at tolerable standard.
ECO-FASHION-DENIM AND DIAGRAMS DICTIONARIES OVERVIEW