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Evaluating the benefits of SuDS Using CIRIA’s BeST July 2015 Elvetham Heath, Hampshire 1.

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Presentation on theme: "Evaluating the benefits of SuDS Using CIRIA’s BeST July 2015 Elvetham Heath, Hampshire 1."— Presentation transcript:

1 Evaluating the benefits of SuDS Using CIRIA’s BeST July 2015 Elvetham Heath, Hampshire 1

2 Assessing benefits – why should we? Elvetham Heath, Hampshire 2

3 www.ciria.org | www.susdrain.org Should we value benefits?  Difficult to  Identify & link benefits to quantifiable outcomes  Value quantified benefits (reliance on transfers)  Aggregate (benefits, populations, time)  Uncertainty  Takes time and resources  Moral concerns 3 If we don’t, they are zero

4 www.ciria.org | www.susdrain.org We have challenges now and in the future Flooding – people and property Legislation and planning Water quality of urban watercourses Connecting with water (on the surface) Liveability – quality of life Support growth – population & economy 4

5 www.ciria.org | www.susdrain.org What is possible? How do we account for the benefits and should we? Provide amenity and recreation Improve water quality Limit flows entering system Use as a resource Improve health and wellbeing Provide education Increase property value Help manage air quality Improve thermal comfort Maximise network capacity Enhance quality of urban space Enhance biodiversity 5

6 www.ciria.org | www.susdrain.org How do we change? Sustainable Drainage Systems manages impacts from development on the quantity and quality of runoff, provides amenity and biodiversity as well as other potential benefits. 6

7 www.ciria.org | www.susdrain.org Stormwater management approaches to cope with different size storms in different ways can create a range of benefits 7

8 www.ciria.org | www.susdrain.org Evaluating the benefits unlocks the potential for…  Fairer comparisons  Better decision making  Meeting funding requirements  Enabling conversations  Delivering SuDS 8

9 Some tools exist but….. 9

10 www.ciria.org | www.susdrain.org Overall aim of BeST “The overall aim of this proposal is to collate and evaluate potential methodologies for assessing the benefits of SuDS, develop approaches accepted by relevant stakeholders and using available data develop a tool to estimate the multiple benefits of SuDS”.

11 www.ciria.org | www.susdrain.org Thanks to our funders 11

12 Introducing: W045 BeST Elvetham Heath, Hampshire 12

13 BeST: Benefits of SuDS Tool Collation of evidence (values) Structured assessment approach Considers confidence Support practitioners to qualify and quantify (monetise) benefits Compare drainage options Provision of detailed audit trail 13

14 Wide range of benefits Environmental Supporting Provisioning Cultural Benefit categoryMonetised? Air quality Amenity Biodiversity and ecology Building temperature Carbon reduction & sequestration Crime  Economic growth  Education  Enabling development Flexible infrastructuretbc Flooding Groundwater recharge Health Pumping wastewater Rainwater harvesting Recreation Tourism  Traffic calming  Treating wastewater Water quality 14 Triple bottom line Ecosystem Services

15 BeST has a suite of outputs 15

16 www.ciria.org | www.susdrain.org Using BeST – applying it HOME Double counting check Work sheets to fill in For information Potential stakeholders Project inputs Screening questions Fill in & for information Values library SuDS Used Benefits / impacts Summary of outputs Summary Results ESS Comparison tool Yearly Values library 16

17 www.ciria.org | www.susdrain.org Using BeST– applying it 17 HOME Double counting check Work sheets to fill in For information Potential stakeholders Project inputs Screening questions Fill in & for information Values library SuDS Used Benefits / impacts Summary of outputs Summary Results ESS Comparison tool Yearly Values library

18 www.ciria.org | www.susdrain.org Using BeST– applying it 18 HOME Double counting check Work sheets to fill in For information Potential stakeholders Project inputs Screening questions Fill in & for information Values library SuDS Used Benefits / impacts Summary of outputs Summary Results ESS Comparison tool Yearly Values library

19 www.ciria.org | www.susdrain.org Using BeST – applying it 19 HOME Double counting check Work sheets to fill in For information Potential stakeholders Project inputs Screening questions Fill in & for information Values library SuDS Used Benefits / impacts Summary of outputs Summary Results ESS Comparison tool Yearly Values library

20 Examples using W045 BeST Elvetham Heath, Hampshire 20

21 www.ciria.org | www.susdrain.org Applying BeST – Retrofit Case Study

22 www.ciria.org | www.susdrain.org Applying BeST – Retrofit Case Study 22

23 www.ciria.org | www.susdrain.org Applying BeST – Retrofit Case Study 23

24 www.ciria.org | www.susdrain.org Applying BeST – Glasgow SWMP 24

25 www.ciria.org | www.susdrain.org Applying BeST – Glasgow SWMP 25

26 www.ciria.org | www.susdrain.org Applying the results 1.£ does not equal a £ - its an indication 2.Help identify the wider benefits 3.Demonstrate the potential level of benefits 4.Understand who might benefit 5.Support conversations, look at wider funding opportunities 6.Understand benefits to investigate further 26

27 www.ciria.org | www.susdrain.org Thank you Want to know more? http://www.susdrain.org/resources/best.html best@susdrain.org Studio Engleback, Curtins Consulting & Kevin McCloud 27

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