The concept of "Virtual Water" has been used since the 1990s to refer to water embedded in imported food. It is a way for water scarce regions to secure their food availability, without putting more strain on their domestic water resources. The concept was developed for the Middle East region, partly to help explain why water scarcity did not directly lead to conflicts over this fundamental resource. Water scarcity did not have the expected impacts on society because the main use for water, to grow food, was outsourced to other countries with plenty of available fresh water resources.
But is that last part true? Are there countries with such a surplus of water that they can export large amounts of virtual water to other countries without any major local impacts? Or is virtual water leading to the reallocation of water scarcity?
In order to investigate these questions, we will need to introduce some more concepts related to virtual water. We need to separate between blue water, which is the fresh water stored in lakes, rivers and underground reservoirs (aquifers), and green water, which is the rain water that gets stored in the soil as soil moisture. Simply put, if you import virtual blue water, you are importing food that has been grown using irrigation, while if you import virtual green water you are importing food from rainfed crops.
A recent shows that between 1986 and 2010 most of the imported green water in the MENA region came from USA, Argentina, Australia and Brazil. Most of the imported blue water, however, came from USA, Pakistan, France and India. Looking at this from the from 2012 we see that large parts of USA already were suffering from, or were approaching, physical water scarcity. All of Pakistan were suffering from physical water scarcity or approaching it, while India, in addition to having or approaching physical water scarcity, were also suffering from economic water scarcity. France is the only country that has little or no water scarcity. So what does these different types of water scarcity mean?
Signup to our newsletter and follow us on Facebook and Twitter!
Physical water scarcity means that the water resource use has exceeded sustainable limits, and that more than 75% of the water from rivers are withdrawn for human purposes. Areas with between 60 and 75% withdrawal from rivers are defined as approaching water scarcity and are likely to become water scarce in the near future. Economic water scarcity means that less than 25% of the water from rivers are withdrawn for human purposes, but that local human needs cannot be met for socio-economic reasons. The Middle East is thus importing virtual water from countries who, in the future, are likely to have to import their own virtual water, due to a looming water crisis. What happens when the current exporters of virtual water need to start importing? What should we do when we have reallocated water scarcity to all countries?
In Pakistan, the looming water crisis has been described as . While water quality and access to safe drinking water is a major issue in Pakistan, the country's available water resources have decreased from More than 90% of the country's water resources are used for irrigation and other agricultural purposes, and unsustainable use of the water and land resources has caused land degradation, including salinity and water logging. Pakistan's economy is largely based on agriculture, which comprises 20% of Gross Domestic Production (GDP), and more than 50% of the country's exports.
While import of virtual water from already scarce countries is causing problems locally, as in the case of Pakistan, there is also a global food security perspective to consider. Being dependent on food imports may create vulnerability in the domestic food supply, as has been seen in Egypt during the global food price spikes in 2008 and 2011, and in Iraq during the international sanctions period that prohibited the export of oil, and thus restricted food imports. The looming food crisis in the Middle East is not something new, but it is a problem that needs more attention in order to create resilient and sustainable societies across the Middle East, and the world in general. Because what happens when we no longer can reallocate our water problems?