1. LoDEG London Drainage Engineering Group
Chairperson – George Warren (LBHF)

2. SuDS and Green Infrastructure
LoDEG what do we do?
Culverted rivers
Drainage
Stop flooding
Gullies
SuDS and Green Infrastructure

3. 2015 LoDEG Meetings
Meetings held in April, July and November 2015, two jointly with Drain London, topics are wide and varied;
Thames Water Twenty4Twenty Presentation
Discussion around SuDS and changes to planning process
WaterRIDE Presentation by BMT-WBM
Monitoring presentation by Timeview Telemetry
Flexi-pave presentation by KBI
Survey feedback
London Sustainable Drainage Action Plan launch
Presentation by JBA on Flood Risk Insurance
Flood Advisory Service & Flood Professionals Presentation
Discussion around planning applications
Update from DEFRA & Thames RFCC

4. Future 2016 LoDEG Meetings Next meeting on 14th March 2016
Significant Flood Risk Management Asset Framework Update by Metis Consulting
Intelligent Rainwater Harvesting by Aquality
Emergency Flood Protection (Alternative to Sandbags) by Gravitas International
TfL’s SuDS Streetscape Guidance Update by J&L Gibbons
Twenty4Twenty update by Thames Water
London Sustainable Drainage Action Plan update by GLA
London Plan Review and London Environment Strategy for the next Mayor
General update from DEFRA & Thames RFCC

5. LoDEG Survey Survey ran from April to May 2015
29 responses from 22 London Boroughs and the GLA (66%)
Survey provided a focus for LoDEG for 2015/16
Survey results were used to successfully bid for funding from LoTAMB to address certain outcomes of the survey

6. Assets S 21 Lead Local Flood Authorities: duty to maintain a register
(1) A lead local flood authority must establish and maintain:
(a) a register of structures or features which, in the opinion of the authority, are likely to have a significant effect on a flood risk in its area, and
(b) a record of information about each of those structures or features, including information about ownership and state of repair.

7. Assets
“Do you believe that a London specific definition of what is considered a significant flood risk asset would be useful?”
83% in favour of a standard significant flood asset definition
Note - definition will be advisory
ACTION – LoDEG developing a Framework for defining a Significant Flood Risk Management Asset

8. Bid 49 - Significant Flood Risk Management Asset Framework
Survey was open to all LLFAs from 02/02/16 to 24/02/16
Survey included 34 questions with the aim of gathering data on how LLFAs are currently defining Significant Flood Risk Management Assets
25 responses received (75% response rate)
Using the data gathered the project team will develop a framework for London to help LLFAs come up with an appropriate definition for their borough.

9. FloodStation
“Do you currently (or intend to) use Floodstation as your asset database?”
15 Boroughs (18 respondents) stated that they either currently use Floodstation or intend to use it in the near future.
The majority of the other Boroughs use Confirm
ACTION – LoDEG have commissioned a review of Floodstation to see if its fit for purpose and identify what improvements are necessary to encourage wider usage

10. Bid 49 – Floodstation Review
To understand it’s functionality
Is it fit for purpose?
What needs to be done to make it the “Goto” software

11. What LoDEG delivers LoTAMB Funded
CIRIA SuDS Manual, launched November 2015 (
CIRIA SuDS Construction Guidance (Illman Young & EPG)
Significant Flood Asset Definition & Floodstation Review

12. What LoDEG delivers Guidance Trees in Hard landscapes – TDAG
Designing for exceedance - CIRIA
BesT – CIRIA
TfL SuDS Guidance – TfL
Non-Statutory Technical Standards For Sustainable Drainage – LASOO
SuDS Manual - CIRIA

13. What LoDEG delivers Groups Susdrain TRFCC
TAG Flood and Coastal committee
Association of Thames Drainage Authorities
Capacity Building
LASOO

14. So is it really all just concrete, pipes, gullies and impressions of King Canute?

15. Downpipe disconnection – LB Haringey
Queensbury Recreation Ground river restoration and flood storage area - LB Harrow
Crown Woods Way, Rain Gardens Stockholm trees/Air pollution/noise pollution – RB Greenwich
Swale, Car park Extension – LB Bromley

16. Firs Farm Wetlands (under construction) – 4,000m2 of constructed wetland plus 30,000m3 of flood storage reduces risk for >100 properties – LB Enfield
Town Park Wetlands (2014) – restores water to disused boating pond, attenuates flows from SW drainage before entering main river – LB Enfield
Grovelands Park River Restoration (2014) – 2 No flood storage areas, de-culverting 250m of ordinary watercourse with SuDS bioremediation/wetland – LB Enfield

17. Comber Grove Downpipe disconnection – LB Southwark
Herne Hill and Dulwich FAS, 51,000m3≥ surface water, Creation of 3,750m2 wetland and 6,400m2 wildflower meadows – LB Southwark
Southampton Way, De-pave – LB Southwark

18. Bridget Joyce Square (Australia Road) retrofitting highway into a shared space with permeable paving, raingardens, bio-rentention basins, downpipe disconnection with a controlled release to the combined sewer
– LB Hammersmith & Fulham
Kenmont ‘Rain’ Gardens retrofitting of highway into pocket park with raingardens and underground storage – LB Hammersmith & Fulham

19. Queen Caroline Housing Estate (LiFE+) Green Roofs, downpipe disconnection, swales, rangardens, basins, controlled sewer release – LB Hammersmith & Fulham
Richard Knight House (LiFE+) Green Roofs, downpipe disconnection, swales, rangardens, engineered tree pits, controlled sewer release – LB Hammersmith & Fulham

20. Thank You Next Meeting - 14th March 2016 (14:00-16:30) @ City Hall
To attend please contact –