At a glance
- DatesOctober 2016 - September 2019
- SponsorBiotechnology and Biological Sciences Research Council (BBSRC), Economic and Social Research Council (ESRC), Natural Environment Research Council (NERC) and the Scottish Government.
- PartnersUniversity of East Anglia, NIAB EMR (formerly East Malling Research), University of Oxford, Institute of Natural Resources NPC.
Water risks to the UK’s fresh fruit and vegetable supply system
Fruit and vegetables are integral to human health, and water is integral to fruit and vegetable production and provision. As such, fruit and vegetable supply chains are exposed to a range of water-related risks and these look set to increase in the future due to the increasing demand on water resources from the burgeoning global population and concomitant industrial development; the negative impacts of more frequent extreme weather events on production; and the need to reserve water resources to sustain the environment.
For businesses that grow and process fruit and vegetables, a secure and reliable supply of safe freshwater is critical, since its availability determines whether consumers are able to access fruit and vegetables in the quantities and at the quality they want. Lack of access to freshwater due to drought, increased demand from other sectors or pollution forces businesses to juggle the risk of failing to supply customers against the range of potential risks that they may be exposed to when operating where there is high competition for water.
To reduce the system’s vulnerability to water-related risks, it is necessary to understand these risks from the perspectives of the different stakeholders whose various decisions collectively determine the shape of the system and govern the supply chains within it. Using an interdisciplinary approach that combines agro-hydrological analysis with stakeholder engagement, this project aims to understand how we can increase the resilience of the UK fresh fruit and vegetable supply system to water-related risks.
Findings to date
Mapping water scarcity in the UK’s fresh fruit and vegetable system
The project began by mapping water scarcity ‘hotspots’ in the UK’s fruit and vegetable system. Researchers identified how much fresh fruit and vegetables (FF&V) the UK sourced annually over the last 20 years to make up the national supply, and then estimated the quantity of freshwater used as irrigation in its production. We used our results to explore the water scarcity implications of the UK’s water consumption for FF&V by estimating the ‘water scarcity footprint’ (WSF) of the UK’s fresh fruit and vegetable supply.
The supply of FF&V to the UK consumes 550 million m3 of freshwater per year, 76% of which is withdrawn overseas, and the WSF of the UK’s FF&V supply is increasing over time as both the overall size of the supply, as well as the proportion of imports sourced from overseas, have increased:
- Over the past two decades, the per capita supply of fruit has risen by 23%, and vegetables, 7%, whilst the per capita supply of potatoes has fallen by 26%.
- In line with this increased provision, the WSF of the UK’s fruit supply has increased by 32%, which largely reflects increased imports from water-stressed fruit producing countries such as Spain, Egypt and Chile.
- Domestically-produced vegetables making up the UK’s current supply (2011-2015) have fallen by 30kg/capita/year compared with two decades ago (1996-2000). This difference has been compensated by increased imports from the Netherlands (similar water scarcity to the UK), but also from countries like Spain, Egypt, Senegal and Morocco, all of which are considerably more water-stressed than the UK. Water scarcity in, for example, Spain, is 17 times higher than in the UK, hence sourcing shifts have resulted in a 63% increase in the UK’s WSF for vegetables.
- The WSF attributable to potatoes has declined by 51%, not only because the size of the nation’s supply of potatoes has gone down, but also because the sourcing of potatoes from Egypt, where water scarcity is very high, has declined. Consequently, the UK’s supply is now more dependent on domestic potatoes, which have a far lower WSF than Egyptian ones.
How are water-related risks perceived by different system stakeholders? Can we improve our understanding of how to make the system more resilient by working collaboratively?
The project is running two case studies, one in the east and southeast of the UK, and a second in South Africa. In each case, quantitative and qualitative survey methods are being used to gain insights into how producers perceive and adapt to the water-related risks they encounter, and how they feel the water risks they face are influenced by the actions of others in the system such as retailers and regulators.
Workshops are being run in each country with the aim of bringing together diverse stakeholders from across FF&V supply chains to collaboratively develop strategies for increasing the resilience of the UK’s FF&V system to water-related risks.
Outputs from the workshops and surveys will feed into the development of a ‘serious game’ which will allow stakeholders to unravel the impacts that different actions and decisions may have at different points and for different entities in the system. This will provide opportunities to experiment with alternative pathways of development for the fruit and vegetable supply system, will help different stakeholders to better understand how they affect, and are affected by, others, and permit insights into how the system could be changed to increase its resilience to water risks and enhance its sustainability in the future.
This project is one of ten in a 13.9 million investment: “Resilience of the UK Food System in a Global Context”, funded by the Global Food Security Programme.