Calculating Water Footprint: Process, Importance and Applications in Industry
Definition of Water Footprint:
Water Footprint is a measure for measuring the amount of water consumption in the production processes, consumption and daily life of an individual, organization, product or country. This criterion examines all water sources used, including freshwater, surface water, groundwater and rainwater, throughout the entire life cycle of a product, process or activity.
The water footprint is generally categorized into three main sections:
- Blue Water: Water used from surface and groundwater sources.
- Green Water: Water in the soil and used for agriculture and plant production processes.
- Gray Water: Water used to dilute or treat pollutants.
Why is calculating the water footprint important?
Given the scarcity of water resources in many parts of the world, calculating the water footprint allows organizations and countries to:
- Make the amount of water consumption in production and consumption processes transparent.
- Get a better understanding of their impact on water resources.
- Help reduce water consumption and optimally manage water resources.
- Thus, meet environmental and legal requirements.
How to calculate the water footprint
Calculating the water footprint in industry and organizations includes the following steps:
- Collecting water consumption data
The first step in calculating the water footprint is to collect water consumption data in all parts of the organization:
- Water consumption in production processes (such as water use in steel, chemical, textile, food production)
- Water consumption in irrigation (for the agricultural sector)
- Water consumption in everyday services (water consumption in offices, buildings, restaurants, hotels)
- Determine the sources of water used
It should be determined from which sources the water is supplied:
- Surface water: rivers, lakes
- Ground water: wells and underground sources
- Rainwater: for agricultural processes or surface collection
- **Using Water Consumption Factors
To calculate the water footprint, standard factors are used that show the amount of water consumed for each specific process and product. For example:
- Water consumption to produce one kilogram of steel
- Water consumption in agricultural processes (e.g. producing one kilogram of wheat)
- Water consumption for energy production (e.g. water consumed in power plants)
- Calculating the total water footprint
The water footprint is generally calculated as the sum of blue, green and grey water, which shows the total amount of water consumption as a single number.
Importance of water footprint in industry:
- Reducing environmental impacts:
By calculating and reducing their water footprint, industries can reduce the negative impact on water resources and prevent water shortages in sensitive areas.
- Saving resources and costs:
Proper management of water consumption in industrial processes can help reduce costs and increase productivity, especially in areas with water shortages.
- Following international laws and standards:
According to global requirements such as ISO 14046 (the international standard for calculating water footprints) and corporate social responsibility (CSR) programs, organizations must monitor and report their natural resource consumption.