Virtual Water Scarcity Risk to the Global Trade System

Area of Science:

• Environmental Economics
• Global Trade Analysis
• Water Resource Management

Background:

• Local water scarcity risk (LWSR) can impact economies through global supply chains.
• Understanding the transmission of water scarcity impacts is crucial for global economic resilience.
• The geographical separation between water scarcity and economic losses is intensifying.

Purpose of the Study:

• To analyze the impact of LWSR on the global trade system from 1995 to 2009.
• To identify nations and sectors vulnerable to water scarcity transmitted via international trade.
• To map the flow of virtual water scarcity risk (VWSR) in the global economy.

Main Methods:

• Analysis of global trade data from 1995 to 2009.
• Quantification of virtual water scarcity risk (VWSR) exports and imports.
• Identification of key nation-sectors involved in the transmission of water scarcity risk.

Main Results:

• Observed increasing geographical decoupling of physical water scarcity and production losses.
• Identified top exporting nation-sectors of VWSR, including agriculture and utilities in China, India, Spain, France, and Turkey.
• Highlighted vulnerable importing nation-sectors facing risks from distant water scarcity.

Conclusions:

• Nations must collaborate on water resource management and conservation.
• Firms in high VWSR-importing sectors need risk mitigation strategies.
• The study provides a foundation for understanding and addressing global water security in trade.