Short answer

Designers and businesses must acknowledge and account for the 'hidden' environmental costs of consumption, particularly water impacts, that are shifted to upstream suppliers.

Field: Resource Management
Source: Water Resources Research (2016)
Method: Quantitative analysis and modelling of virtual water and pollutant flows.
Evidence: Strong effect

The consumption patterns of large urban centers can disproportionately externalize water quantity and quality burdens onto their trading partners, impacting regions with already strained resources. This resource management research insight is drawn from a 2016 study published in Water Resources Research. Using Quantitative analysis and modelling of virtual water and pollutant flows., researchers explored how this design variable affects real-world outcomes. The key design takeaway: Designers and businesses must acknowledge and account for the 'hidden' environmental costs of consumption, particularly water impacts, that are shifted to upstream suppliers.

Study

Resource ManagementHigh ImpactStrong effect

Megacity Consumption Drives Significant Water Stress in Supplying Regions

The consumption patterns of large urban centers can disproportionately externalize water quantity and quality burdens onto their trading partners, impacting regions with already strained resources.

Water Resources Research · 2016

Key Findings

01Shanghai's consumption in 2007 resulted in 11.6 billion m³ of freshwater consumption and significant pollutant discharge (796 thousand tons of COD, 16.2 thousand tons of NH3-N) in other provinces.
02A large majority (79-82.9%) of these water quantity and quality impacts were outsourced to other Chinese provinces.
03Provinces already facing severe water quantity and quality stress bore a disproportionate share of this outsourced burden.

Application

Design takeaway

Designers and businesses must acknowledge and account for the 'hidden' environmental costs of consumption, particularly water impacts, that are shifted to upstream suppliers.

How to apply

When designing products or services for urban markets, conduct a 'virtual water' and 'virtual pollution' audit of your supply chain to identify and address externalized environmental impacts.

Project actions

01Consider the geographical origin of materials and manufacturing processes for your design project.
02Research the water availability and quality in those regions to understand potential impacts.

Method & Evidence

AimTo quantify the extent to which Shanghai's consumption of goods and services leads to the externalization of freshwater consumption and water pollution stress onto other Chinese provinces.

MethodQuantitative analysis and modelling of virtual water and pollutant flows.

ProcedureThe study analyzed trade data and water resource data for Shanghai in 2007 to calculate the freshwater consumption and wastewater discharge (COD and NH3-N) associated with its consumption. It then attributed these impacts to the provinces supplying the goods and services.

ContextUrban consumption, supply chains, water resource management, environmental impact assessment.

Variables

IVMegacity consumption patterns (types and volumes of goods/services consumed).

DVWater quantity stress (freshwater consumption) and water quality stress (pollutant discharge - COD, NH3-N) in supplying regions.

CVTrade relationships between megacity and supplying provinces, provincial water resource conditions.

Strengths & Limitations

Strengths

+Quantifies a significant environmental externality of urban consumption.
+Provides a clear link between consumption and geographically distant environmental impacts.

Limitations

It can be difficult to get precise data on the exact water usage and pollution levels for every component in a complex global supply chain.

Reliability & validity

The study's reliability relies on the accuracy of trade and water data. Validity is supported by the clear attribution of consumption-driven impacts to specific regions.

Think critically

How can designers actively choose materials and manufacturing processes that minimize the water stress imposed on producing regions, rather than simply optimizing for cost or convenience?

Design Principles

"Design for distributed responsibility: Recognize and mitigate the environmental impacts of your products and services beyond your immediate operational boundaries."

This highlights a critical, often overlooked, aspect of resource management in urban planning and supply chain design. Designers and engineers must consider the full lifecycle impact of products and services, recognizing that the 'use' phase in a megacity can create significant environmental stress elsewhere.

What This Means for Your Design

When a big city buys things, it uses up water and creates pollution in the places where those things are made, even if the city doesn't see it directly.

How to use in your project

1.Use this research to justify investigating the supply chain's environmental footprint for your design project, especially concerning water resources.

Add to My Project

Quick Cite

Paragraph starter

This research highlights the significant burden shifting of water quantity and quality stress from urban consumption to supplying regions. For my design project, this implies a need to critically examine the water footprint of my chosen materials and manufacturing processes, particularly if they originate from areas already experiencing water scarcity or pollution.

Source

Water Resources Research

Burden shifting of water quantity and quality stress from megacity <scp>S</scp>hanghai

journal · 2016

View source

Questions About This Research

What does the research say about megacity consumption drives significant water stress in supplying regions?: Designers and businesses must acknowledge and account for the 'hidden' environmental costs of consumption, particularly water impacts, that are shifted to upstream suppliers. Evidence: Water Resources Research (2016).
Why does "Megacity Consumption Drives Significant Water Stress in Supplying Regions" matter for design?: This highlights a critical, often overlooked, aspect of resource management in urban planning and supply chain design. Designers and engineers must consider the full lifecycle impact of products and services, recognizing that the 'use' phase in a megacity can create significant environmental stress elsewhere.
How can designers apply this research?: Designers and businesses must acknowledge and account for the 'hidden' environmental costs of consumption, particularly water impacts, that are shifted to upstream suppliers.
What were the main findings?: Shanghai's consumption in 2007 resulted in 11.6 billion m³ of freshwater consumption and significant pollutant discharge (796 thousand tons of COD, 16.2 thousand tons of NH3-N) in other provinces.. A large majority (79-82.9%) of these water quantity and quality impacts were outsourced to other Chinese provinces.. Provinces already facing severe water quantity and quality stress bore a disproportionate share of this outsourced burden.
What research method was used?: Quantitative analysis and modelling of virtual water and pollutant flows..
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2016 journal from Water Resources Research.
What should I do differently in my next project?: When designing products or services for urban markets, conduct a 'virtual water' and 'virtual pollution' audit of your supply chain to identify and address externalized environmental impacts.
What are the limitations?: The study focused on a single year (2007) and specific pollutants (COD, NH3-N), and may not capture all nuances of water stress or trade dynamics.