A Systematic, Multi-Criteria
Decision Support Framework for
Sustainable Drainage Design
Jo-fai Chow,
Dragan Savić,
David F...
About this Presentation
• Background
• Multiple Benefits (Green Values) of Sustainable
Drainage Systems
• Systematic Evalu...
Background
• Trends in Drainage Industry
• Moving towards a sustainable
approach
03 of 14
slides
Sustainable & Balanced
Ap...
Background
• Trends in Drainage Industry
• Moving towards a sustainable
approach
• Challenge
• Lack of commonly agreed sta...
Background
• Trends in Drainage Industry
• Moving towards a sustainable
approach
• Challenge
• Lack of commonly agreed sta...
Background
• Trends in Drainage Industry
• Moving towards a sustainable
approach
• Challenge
• Lack of commonly agreed sta...
Green Values (Multiple Benefits)
of Sustainable Drainage Systems
• Water Quantity Reduction
• Runoff reduction, flood risk...
Green Values (Multiple Benefits)
of Sustainable Drainage Systems
• Water Quantity Reduction
• Runoff reduction, flood risk...
Green Values (Multiple Benefits)
of Sustainable Drainage Systems
• Water Quantity Reduction
• Runoff reduction, flood risk...
Green Values (Multiple Benefits)
of Sustainable Drainage Systems
• Water Quantity Reduction
• Runoff reduction, flood risk...
Green Values (Multiple Benefits)
of Sustainable Drainage Systems
• Water Quantity Reduction
• Runoff reduction, flood risk...
Quantifying Green Values:
From Good Feelings to Real Numbers
05 of 14
slides
Calculations based on
previous research proje...
Putting the Numbers Together:
A Systematic Evaluation Framework
06 of 14
slides
Putting the Numbers Together:
A Systematic Evaluation Framework
06 of 14
slides
Information from a typical drainage model ...
Four main categories of performance measures.
Putting the Numbers Together:
A Systematic Evaluation Framework
06 of 14
sli...
Key performance indicators (KPIs) calculated for each infrastructure.
Putting the Numbers Together:
A Systematic Evaluatio...
Using physical attributes & location of infrastructures to calculate costs.
Putting the Numbers Together:
A Systematic Eva...
Calculate monetary measures of benefits based on KPIs.
Putting the Numbers Together:
A Systematic Evaluation Framework
06 ...
Consider costs and benefits over the design life of systems.
Putting the Numbers Together:
A Systematic Evaluation Framewo...
Drainage Model
Putting the Numbers Together:
A Systematic Evaluation Framework
06 of 14
slides
Multiple
Benefits
Monetary
...
Using the Framework – Inputs:
Components in a Drainage Design Model
07 of 14
slides
Bioretention
Bioretention
Permeable
Pa...
Using the Framework – Outputs:
Operational and Capital Expenditure
08 of 14
slides
Using the Framework – Outputs:
Operational and Capital Expenditure
08 of 14
slides
Swales are relatively
cheap to build an...
Using the Framework – Outputs:
Operational and Capital Expenditure
08 of 14
slides
Permeable paving
costs a lot more to
bu...
Using the Framework – Outputs:
Operational and Capital Expenditure
08 of 14
slides
Question: can the
costs be justified?
Using the Framework – Outputs:
Key Performance Measures
09 of 14
slides
Using the Framework – Outputs:
Key Performance Measures
09 of 14
slides
Permeable paving can effectively reduce runoff via...
Using the Framework – Outputs:
Key Performance Measures
09 of 14
slides
At a fraction of the cost, swales can provide mode...
Using the Framework – Outputs:
Key Performance Measures
09 of 14
slides
Goal: moving away from
subjective opinions to a
sy...
Comparing Different Approaches:
Sustainable vs. Traditional
10 of 14
slides
Bioretention
Permeable
Paving
BioretentionWetl...
Comparing Different Approaches:
Sustainable vs. Traditional
10 of 14
slides
Bioretention
Permeable
Paving
BioretentionWetl...
Comparing Different Approaches:
Sustainable vs. Traditional
10 of 14
slides
Bioretention
Permeable
Paving
BioretentionWetl...
Comparing Different Approaches:
Sustainable vs. Traditional
11 of 14
slides
Comparing Different Approaches:
Sustainable vs. Traditional
11 of 14
slides
Sustainable approach can provide multiple bene...
Comparing Different Approaches:
Sustainable vs. Traditional
11 of 14
slides
Sustainable approach costs about the same to o...
Comparing Different Approaches:
Sustainable vs. Traditional
11 of 14
slides
In this case, the framework suggests similar l...
Comparing Different Approaches:
Sustainable vs. Traditional
11 of 14
slides
(Let me repeat the key message again…)
Each te...
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
•...
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
•...
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
•...
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
•...
Going Beyond Evaluation:
Maximising Multiple Benefits
12 of 14
slides
• Design Consideration:
• Legislative Requirements
•...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Conclusions 13 of 14
slides
• Challenges: lack of commonly agreed standard for sustainable
drainage design.
• Aim: to deve...
Acknowledgement 14 of 14
slides
David Fortune and
Netsanet Mebrate
XP Solutions
Professors Dragan Savić
and Zoran Kapelan,...
Thank you for your attention 
Any questions?
jo-fai.chow@stream-idc.net
http://tinyurl.com/chow-iahr2013
http://tinyurl.c...
Additional Information:
Capital and Operational Expenditure
Extra
slides
Additional Information:
Estimation of Annual Reduced
Runoff (m3)
Extra
slides
Additional Information:
Annual Energy Savings
Extra
slides
Additional Information:
Amenity Value of New Habitats
Extra
slides
Additional Information:
Determining Locations - Height Map
Extra
slides
HIGH
LOW
Natural Flow Pattern
(General)
Additional Information:
Determining Locations - Deluge
Extra
slides
Natural Ponding
Additional Information:
Determining Locations – Site Layout
Extra
slides
Draft site layout based on land
value and expecte...
Additional Information:
Determining Locations – Mimic The
Nature
Extra
slides
Mini Sub-catchments
Sustainable Drainage
Sys...
Additional Information:
Comparing Multiple Design Options
Different design options. Comparing multiple benefits with paral...
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A Systematic, Multi-Criteria Decision Support Framework for Sustainable Drainage Design

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Conference Presentation for 35th IAHR World Congress, Chengdu, China

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Transcript of "A Systematic, Multi-Criteria Decision Support Framework for Sustainable Drainage Design"

  1. 1. A Systematic, Multi-Criteria Decision Support Framework for Sustainable Drainage Design Jo-fai Chow, Dragan Savić, David Fortune, Zoran Kapelan, Netsanet Mebrate You can download this presentation from http://tinyurl.com/chow-iahr2013 photo's courtesy of www.pptbackgrounds.net
  2. 2. About this Presentation • Background • Multiple Benefits (Green Values) of Sustainable Drainage Systems • Systematic Evaluation Framework with Application Examples • Maximising Multiple Benefits • Conclusions 02 of 14 slides
  3. 3. Background • Trends in Drainage Industry • Moving towards a sustainable approach 03 of 14 slides Sustainable & Balanced Approach Traditional & Biased Approach Water Quantity Water Quality Other Benefits Water Quantity Water Quality
  4. 4. Background • Trends in Drainage Industry • Moving towards a sustainable approach • Challenge • Lack of commonly agreed standard for sustainable drainage design 03 of 14 slides Sustainable & Balanced Approach Traditional & Biased Approach Water Quantity Water Quality Other Benefits Water Quantity Water Quality
  5. 5. Background • Trends in Drainage Industry • Moving towards a sustainable approach • Challenge • Lack of commonly agreed standard for sustainable drainage design • Objective • To develop a new decision support system for sustainable drainage design 03 of 14 slides Sustainable & Balanced Approach Traditional & Biased Approach Water Quantity Water Quality Other Benefits Water Quantity Water Quality
  6. 6. Background • Trends in Drainage Industry • Moving towards a sustainable approach • Challenge • Lack of commonly agreed standard for sustainable drainage design • Objective • To develop a new decision support system for sustainable drainage design • Collaboration • Funded by EPSRC and XP Solutions • Supervised by Uni. of Exeter, XP Solutions and STREAM IDC 03 of 14 slides Sustainable & Balanced Approach Traditional & Biased Approach Water Quantity Water Quality Other Benefits Water Quantity Water Quality
  7. 7. Green Values (Multiple Benefits) of Sustainable Drainage Systems • Water Quantity Reduction • Runoff reduction, flood risk mgt., re-use 04 of 14 slides photo's courtesy of XP Solutions photo's courtesy of ReneCreate
  8. 8. Green Values (Multiple Benefits) of Sustainable Drainage Systems • Water Quantity Reduction • Runoff reduction, flood risk mgt., re-use • Water Quality Improvement • On-site treatment 04 of 14 slides photo's courtesy of XP Solutions photo's courtesy of ReneCreate photo's courtesy of EMPowerHouse photo's courtesy of roanokeoutside.com photo's courtesy of nzconservation.wordpress.com
  9. 9. Green Values (Multiple Benefits) of Sustainable Drainage Systems • Water Quantity Reduction • Runoff reduction, flood risk mgt., re-use • Water Quality Improvement • On-site treatment • Environmental Impact • Cleaner water & air, amenity, biodiversity, recreation, community 04 of 14 slides photo's courtesy of XP Solutions photo's courtesy of ReneCreate photo's courtesy of EMPowerHouse photo's courtesy of roanokeoutside.com photo's courtesy of nzconservation.wordpress.com photo's courtesy of Arup photo's courtesy of Polypipe
  10. 10. Green Values (Multiple Benefits) of Sustainable Drainage Systems • Water Quantity Reduction • Runoff reduction, flood risk mgt., re-use • Water Quality Improvement • On-site treatment • Environmental Impact • Cleaner water & air, amenity, biodiversity, recreation, community • Energy Saving • Less cooling/heating, reduced carbon footprint 04 of 14 slides photo's courtesy of XP Solutions photo's courtesy of ReneCreate photo's courtesy of EMPowerHouse photo's courtesy of roanokeoutside.com photo's courtesy of nzconservation.wordpress.com photo's courtesy of Arup photo's courtesy of Polypipe photo's courtesy of gregwalcher.wordpress.com photo's courtesy of china.org.cn
  11. 11. Green Values (Multiple Benefits) of Sustainable Drainage Systems • Water Quantity Reduction • Runoff reduction, flood risk mgt., re-use • Water Quality Improvement • On-site treatment • Environmental Impact • Cleaner water & air, amenity, biodiversity, recreation, community • Energy Saving • Less cooling/heating, reduced carbon footprint • Green Image of Business 04 of 14 slides photo's courtesy of XP Solutions photo's courtesy of ReneCreate photo's courtesy of EMPowerHouse photo's courtesy of roanokeoutside.com photo's courtesy of nzconservation.wordpress.com photo's courtesy of Arup photo's courtesy of Polypipe photo's courtesy of gregwalcher.wordpress.com photo's courtesy of china.org.cn photo's courtesy of Deloitte
  12. 12. Quantifying Green Values: From Good Feelings to Real Numbers 05 of 14 slides Calculations based on previous research projects and case studies. For more information: 1.Conference Paper 2.This presentation online (tinyurl.com/greenvalues)
  13. 13. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  14. 14. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides Information from a typical drainage model (e.g. Type, Size, Location)
  15. 15. Four main categories of performance measures. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  16. 16. Key performance indicators (KPIs) calculated for each infrastructure. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  17. 17. Using physical attributes & location of infrastructures to calculate costs. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  18. 18. Calculate monetary measures of benefits based on KPIs. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  19. 19. Consider costs and benefits over the design life of systems. Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides
  20. 20. Drainage Model Putting the Numbers Together: A Systematic Evaluation Framework 06 of 14 slides Multiple Benefits Monetary Benefits Costs Cost-Benefit Analysis
  21. 21. Using the Framework – Inputs: Components in a Drainage Design Model 07 of 14 slides Bioretention Bioretention Permeable Paving Wetland Swale Swale photo's courtesy of XP Solutions Flow
  22. 22. Using the Framework – Outputs: Operational and Capital Expenditure 08 of 14 slides
  23. 23. Using the Framework – Outputs: Operational and Capital Expenditure 08 of 14 slides Swales are relatively cheap to build and maintain.
  24. 24. Using the Framework – Outputs: Operational and Capital Expenditure 08 of 14 slides Permeable paving costs a lot more to build and maintain.
  25. 25. Using the Framework – Outputs: Operational and Capital Expenditure 08 of 14 slides Question: can the costs be justified?
  26. 26. Using the Framework – Outputs: Key Performance Measures 09 of 14 slides
  27. 27. Using the Framework – Outputs: Key Performance Measures 09 of 14 slides Permeable paving can effectively reduce runoff via infiltration … but it does not add amenity value to the community.
  28. 28. Using the Framework – Outputs: Key Performance Measures 09 of 14 slides At a fraction of the cost, swales can provide moderate runoff reduction and increase the amenity value as a result of the green surface areas.
  29. 29. Using the Framework – Outputs: Key Performance Measures 09 of 14 slides Goal: moving away from subjective opinions to a systematic comparison. Each technique has its own advantages and disadvantages
  30. 30. Comparing Different Approaches: Sustainable vs. Traditional 10 of 14 slides Bioretention Permeable Paving BioretentionWetland Swale Swalephoto's courtesy of allbiz Let’s consider the sustainable design example discussed in previous slides again. What if we replace the swales and wetland with storage tanks?
  31. 31. Comparing Different Approaches: Sustainable vs. Traditional 10 of 14 slides Bioretention Permeable Paving BioretentionWetland Swale Swalephoto's courtesy of allbiz Storage Tank Let’s consider the sustainable design example discussed in previous slides again. What if we replace the swales and wetland with storage tanks?
  32. 32. Comparing Different Approaches: Sustainable vs. Traditional 10 of 14 slides Bioretention Permeable Paving BioretentionWetland Swale Swalephoto's courtesy of allbiz Storage Tank Question: is it worth considering the green approach after all? What do you think? Let’s consider the sustainable design example discussed in previous slides again. What if we replace the swales and wetland with storage tanks?
  33. 33. Comparing Different Approaches: Sustainable vs. Traditional 11 of 14 slides
  34. 34. Comparing Different Approaches: Sustainable vs. Traditional 11 of 14 slides Sustainable approach can provide multiple benefits in addition to water management.
  35. 35. Comparing Different Approaches: Sustainable vs. Traditional 11 of 14 slides Sustainable approach costs about the same to operate, much less to build yet a lot more for the land occupied when compared to traditional approach.
  36. 36. Comparing Different Approaches: Sustainable vs. Traditional 11 of 14 slides In this case, the framework suggests similar long-term costs for both approaches.
  37. 37. Comparing Different Approaches: Sustainable vs. Traditional 11 of 14 slides (Let me repeat the key message again…) Each technique has its own advantages and disadvantages. Goal: moving away from subjective opinions to a systematic, evidence- based comparison.
  38. 38. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements
  39. 39. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements • Location
  40. 40. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements • Location • Sizing
  41. 41. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements • Location • Sizing • Type & Order ? ? ? ? ? ?
  42. 42. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements • Location • Sizing • Type & Order • Identifying Trade-offs: • Financial Consideration • Multiple Benefits ? ? ? ? ? ?
  43. 43. Going Beyond Evaluation: Maximising Multiple Benefits 12 of 14 slides • Design Consideration: • Legislative Requirements • Location • Sizing • Type & Order • Identifying Trade-offs: • Financial Consideration • Multiple Benefits • Multi-objective optimisation ? ? ? ? ? ? photo's courtesy of University of Sheffield photo's courtesy of XP Solutions photo's courtesy of BME Imaging photo's courtesy of bfrss.org.uk
  44. 44. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design.
  45. 45. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system.
  46. 46. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management.
  47. 47. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management. • Quantifying green values with KPIs and monetary measures.
  48. 48. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management. • Quantifying green values with KPIs and monetary measures. • A systematic evaluation framework – a better tool for optioneering.
  49. 49. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management. • Quantifying green values with KPIs and monetary measures. • A systematic evaluation framework – a better tool for optioneering. • Integration with multi-objective optimisation – encourage the consideration of multiple benefits.
  50. 50. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management. • Quantifying green values with KPIs and monetary measures. • A systematic evaluation framework – a better tool for optioneering. • Integration with multi-objective optimisation – encourage the consideration of multiple benefits. • Research outputs for industrial sponsor: new features in their drainage design software suite.
  51. 51. Conclusions 13 of 14 slides • Challenges: lack of commonly agreed standard for sustainable drainage design. • Aim: to develop a new decision support system. • Why green infrastructures? Because they can offer multiple benefits in addition to water management. • Quantifying green values with KPIs and monetary measures. • A systematic evaluation framework – a better tool for optioneering. • Integration with multi-objective optimisation – encourage the consideration of multiple benefits. • Research outputs for industrial sponsor: new features in their drainage design software suite. • “Essentially, all models are wrong, but some are useful.” – Professor George E.P. Box photo's courtesy of Amazon
  52. 52. Acknowledgement 14 of 14 slides David Fortune and Netsanet Mebrate XP Solutions Professors Dragan Savić and Zoran Kapelan, University of Exeter
  53. 53. Thank you for your attention  Any questions? jo-fai.chow@stream-idc.net http://tinyurl.com/chow-iahr2013 http://tinyurl.com/greenvalues http://tinyurl.com/xpdrainage XPDrainage Software Demo: Monday (16th Sep) Afternoon Shanghai
  54. 54. Additional Information: Capital and Operational Expenditure Extra slides
  55. 55. Additional Information: Estimation of Annual Reduced Runoff (m3) Extra slides
  56. 56. Additional Information: Annual Energy Savings Extra slides
  57. 57. Additional Information: Amenity Value of New Habitats Extra slides
  58. 58. Additional Information: Determining Locations - Height Map Extra slides HIGH LOW Natural Flow Pattern (General)
  59. 59. Additional Information: Determining Locations - Deluge Extra slides Natural Ponding
  60. 60. Additional Information: Determining Locations – Site Layout Extra slides Draft site layout based on land value and expected return
  61. 61. Additional Information: Determining Locations – Mimic The Nature Extra slides Mini Sub-catchments Sustainable Drainage Systems Mimicking Natural Flow Patterns
  62. 62. Additional Information: Comparing Multiple Design Options Different design options. Comparing multiple benefits with parallel coordinates. Comparing cost-benefits for different options. Extra slides
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