SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D.,...

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SUSTAINABILI TY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National Science Foundation (project no. 0935202).

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Transcript of SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D.,...

Page 1: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

SUSTAINABILITYWhat Does it Mean for Civil Engineers?Developed by Yvette Pearson Weatherton, Ph.D., P.E.

This work was supported by a grant from the National Science Foundation (project no. 0935202).

Page 2: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Objectives

• Prioritize alternatives based on resource conservation/waste management hierarchy

• Categorize project elements into life cycle stages• Use the Sustainable Design Checklist to compare

alternatives

Page 3: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

What is Sustainability?

Page 4: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

What is Sustainability?

Meeting today’s needs without compromising the ability of future

generations to meet their own needs.

(Brundtland Commission, 1987)

Page 5: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Triple Bottom Line

People

ProfitPlanet

Page 6: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Sustainable Alternatives Consider…

Resources Used• Renewable versus Non-renewable

Resource Conservation/Waste Management• Hierarchical System

Life Cycle Analysis• Cradle to Grave Impacts

Page 7: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Resources

Renewable Resources• Can be replaced within a

few generations• Examples:• Timber• Surface Water• Solar Power• Wind

Photo Credit: http://renewables-energy.net

Page 8: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Resources

Non-renewable Resources• Can only be replaced on

geological time scales• Examples:• Fossil Fuels• Coal• Oil• Natural Gas

• Metal Ores• Aluminum• Copper• Iron

Photo Credits: www.webmineral.com, www.darvill.clara.net

http://www.webmineral.com/
http://www.darvill.clara.net/
Page 9: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Why is reuse

preferred above

recycling?

Photo Credit: www.merchantcircle.com

http://www.merchantcircle.com/
Page 10: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Activity 1: Resources

A bicycle manufacturer is considering changing from steel wheel rims to rims made from either aluminum or titanium alloy. From a resource conservation point of view, which alternative would you recommend? Explain your choice.

Consider the Following• Aluminum is a non-

renewable resource.• Titanium alloy is

created by adding other elements to titanium to improve its properties.

• Aluminum is more easily recycled than titanium.

• Titanium is more durable than aluminum.

Source: Davis, M. L. and Masten, S. J. (2009). Principles of Environmental Engineering and Science, 2nd edition. McGraw-Hill, Boston.

Page 11: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages

Creation Use Demolition

Page 12: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages

Creation

“Cradle”Use Demolition

•Design•Material Selection•Site Selection•Construction

Page 13: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages

Use Use Demolition

•Distribution•Operation•Maintenance

Page 14: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages

Use UseDemolition

“Grave”

•Destruction•Disposal

Page 15: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages Example: Water Supply and Treatment

Ground Water

Water Treatment Storage

DistributionCustomerUse

WastewaterDisposal and Treatment

SurfaceWater

Page 16: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages Example: Water Supply and Treatment

Ground Water

Water Treatment Storage

DistributionCustomerUse

WastewaterDisposal and Treatment

SurfaceWater

Page 17: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages Example: Water Supply and Treatment

Ground Water

Water Treatment Storage

DistributionCustomerUse

WastewaterDisposal and Treatment

SurfaceWater

WastewaterReuse

(Irrigation)

Page 18: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Life Cycle Stages Example: Water Supply and Treatment

Ground Water

Water Treatment Storage

DistributionCustomerUse

WastewaterDisposal and Treatment

SurfaceWater

WastewaterReuse

(Irrigation)

Page 19: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Inputs and Outputsfor a Single Stage

Raw wastewater from domestic and industrial

sources

WastewaterTreatment

Energy, equipment,

chemicals, etc.

Treated wastewater to

receiving stream

Reuse of treated wastewater for

irrigation

Page 20: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Activity 2: Life Cycle Stages

Create three separate headings on your paper, one for each life cycle stage. Consider a highway resurfacing project.

(1) List as many components of the project as you can, placing each under the proper life cycle heading.

(2) Consider the demolition stage. List the inputs and outputs associated with that stage.

Page 21: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Alternative Analysis

• Safety• Cost• Usefulness/Feasibility

• Sustainability• Other

• Material Use• Energy Use• Water Use• Solid Waste Generation• Emissions Generation• Water Pollution

Discharges• Land Impacts• Other

Sustainable Design Checklist

Page 22: SUSTAINABILITY What Does it Mean for Civil Engineers? Developed by Yvette Pearson Weatherton, Ph.D., P.E. This work was supported by a grant from the National.

Sustainable Design Checklist


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