Water Pollution Triples Global Water Scarcity Risk by 2050

Why It Matters

Designers and engineers must consider water quality alongside quantity in their resource management strategies. Ignoring pollution can lead to products and systems that are unsustainable or unusable in the long term, impacting user access to essential resources.

Key Finding

The study found that pollution, particularly nitrogen, dramatically increases the risk of water scarcity, potentially affecting three times as many areas and billions more people by 2050.

Key Findings

• Water pollution significantly aggravates water scarcity in over 2000 sub-basins worldwide.
• The number of sub-basins facing water scarcity triples due to future nitrogen pollution.
• By 2050, an additional 40 million km² of basin area and 3 billion people may face water scarcity due to quantity and quality issues.

Research Evidence

Aim: To assess the global impact of future water pollution, specifically nitrogen, on water scarcity by integrating land-system, hydrological, and water quality models.

Method: Integrated modelling (land-system, hydrological, water quality)

Procedure: Global assessment of water scarcity in over 10,000 sub-basins, incorporating nitrogen pollution alongside traditional water quantity factors, for the 2050s.

Context: Global river basins, water resource management, environmental science

Design Principle

Design for Water Quality Resilience: Ensure that design solutions do not deplete or contaminate essential water resources, considering both quantity and quality in the long term.

How to Apply

When designing products or systems that consume or interact with water, conduct a lifecycle assessment that includes potential water pollution impacts and explore mitigation strategies.

Limitations

Focus on nitrogen pollution; other pollutants may have different impacts. Model uncertainties inherent in future projections.

Student Guide (IB Design Technology)

Simple Explanation: Imagine you're designing a new farming tool. This research shows that even if there's enough water, if it gets polluted by things like fertilizer runoff, it can become unusable. So, you need to think about how your tool might prevent pollution, not just how much water it uses.

Why This Matters: This research highlights a critical, often overlooked, factor in resource availability: water quality. For any design project involving water, understanding and mitigating pollution is as crucial as ensuring sufficient supply.

Critical Thinking: How might the specific design choices of a product influence the type and amount of pollutants introduced into water systems, and what are the most effective design strategies to minimize these impacts?

IA-Ready Paragraph: This research underscores the critical role of water quality in resource availability, demonstrating that pollution can triple the risk of water scarcity globally by 2050. This necessitates a design approach that actively mitigates pollutant discharge and prioritizes water purification throughout a product's lifecycle.

Project Tips

• When researching your chosen resource, investigate not only its availability but also its purity and potential for contamination.
• Consider the environmental impact of your design's use phase and end-of-life, especially concerning water bodies.

How to Use in IA

• Reference this study when discussing the sustainability of your chosen resources, particularly if water is involved.
• Use the findings to justify design choices aimed at reducing water pollution or improving water quality.

Examiner Tips

• Demonstrate an understanding of the multifaceted nature of resource scarcity, extending beyond mere quantity.
• Show how your design actively addresses potential negative impacts on water quality.

Independent Variable: Future nitrogen pollution levels

Dependent Variable: Water scarcity (number of affected sub-basins, area, population)

Controlled Variables: Land-system factors, hydrological conditions, water quantity

Strengths

• Global scale assessment
• Integration of multiple modelling types (land-system, hydrological, water quality)

Critical Questions

• What are the primary sources of nitrogen pollution relevant to the design context?
• How can design interventions reduce the release of these pollutants into water systems?

Extended Essay Application

• Investigate the water quality impact of a specific industrial process or consumer product across its lifecycle.
• Develop and test design modifications to reduce the pollutant load in wastewater.

Source

A triple increase in global river basins with water scarcity due to future pollution · Nature Communications · 2024 · 10.1038/s41467-024-44947-3