How can we make SuDS work?

Transcription

1 How can we make SuDS work? Dr David Smoker Business Development Director, ACO Technologies plc Chair, ICE SuDS Task Group Title (edit in slide master)

2 ICE SuDS Task Group Sponsored by ACO Technologies plc

3 ICE SuDS Task Group Dr David Smoker, Business Development Director, ACO Technologies Andrew Eden, National lead for Development and Flood Risk, Environment Agency Dr Virginia Stovin, Reader in Urban Drainage, Univ. of Sheffield Phillip Mills, Director, Policy Consulting Network Chair ICE Water Expert Panel Paul Shaffer, Associate (Water Management) CIRIA Pritesh Patel, National Technical Manager, Wienerberger UK Ian Titherington, Lead Officer, City of Cardiff Council Kay Elvy, Director, BHA Consulting Catherine Kemsley, Snr Flood Risk Consultant, AECOM ICE Water Expert Panel Dr Anna Plodowski, Knowledge Content Producer, ICE

4 ICE SuDS Survey The Context

5 Context for the ICE SuDS Survey Pitt Review >> FWMA 2010, Schedule 3 England: DCLG passed SuDS to NPPF (April 2015) Wales and Scotland are different! Committee on Climate Change found just 15 per cent of planning applications in areas of flood risk contained the phrase sustainable drainage in CIWEM Big SuDS Survey (2016) A Place for SuDS recommended several policy changes to enable wider SuDS implementation Restricting discharge of surface water to the sewer system; Adoption and allocation of maintenance responsibilities for SuDS; New standards to optimise the opportunity to achieve amenity, biodiversity and water quality benefits as well as flood risk reduction; Government review of the barriers to retrofitting SuDS in existing developments. A Place For SuDS?, CIWEM, January 2017

6 Committee on Climate Change Policy is needed urgently to address the outstanding barriers to deliver high quality, effective SuDS in new development that achieve the full range of potential environmental co-benefits. In particular, there is a need for: More comprehensive and ambitious national standards for SuDS. The automatic right to connect new development to the existing sewerage network to be made conditional on the national SuDS standards being met. A clear policy on who should maintain and adopt SuDS by default. Recommendation 13, Progress in preparing for climate change, 2017 Report to Parliament, June 2017

7 Yet another survey? Previous surveys have focused on the need for stronger policy: CIWEM Survey A Place for SuDS Hydro International SuDS: The State of the Nation 2016 Committee for Climate Change Reports How about at the sharp end? Some policy is already there What stops SuDS being implemented on all developments? Can we determine barriers (and enablers) for practitioners?

8 ICE SuDS Survey Example: Which of the following are barriers that you face as a sustainable drainage practitioner? Please select all that apply. National Planning Policy and Process Local policy Available guidance Masterplanning Experience and capability Capacity of resources Selection of appropriate SuDS components Ownership of land Ownership of SuDS Securing long term adoption Hinders highway adoption Capital costs Maintenance costs/difficulties Whole life cost analysis Site constraints: permeability Site constraints: contaminated land Site constraints: development density/loss of land/loss of public space Site constraints: topography Site constraints: other utilities Designing adequately for climate change Incorporating water quality benefits Incorporating biodiversity benefits Incorporating amenity benefits Public awareness/understanding of SuDS Lack of understanding by key decision makers Insurance issues Political will

9 ICE SuDS Survey Which of the following possible outputs/activities would you find valuable to help overcome the barriers identified? 1 Routemap identifying the SuDS process from conceptual design to operation and maintenance 2 General communications resources e.g. to inform presentations to the public or other stakeholders 3 Routemap linking all available documentation and the most current versions 4 Training events 5 Online training resources 6 Case studies of good practice 7 Cost/benefit tool

10 ICE SuDS Survey ICE Designers CIWEM Environmental Wildlife Trusts Rivers Trust British Hydrological Soc. Inst. Highways Eng Inst. of Water Adopters Chartered Inst. Highways & Transportation January respondents Contractors LLFA Local Planners British Geological Soc RICS Landscape Inst. Town & Country Planning Assoc. Royal Town Planning Inst.

11 ICE SuDS Survey Numbers may not add up to 100% due to rounding (Self Defined) Role of Respondents Total Expert Not Expert ICE Members Central Government 2% 3% 1% 1% Devolved Government 1% 1% 1% Regulator 1% 1% 1% Sewerage undertaker 9% 8% 9% 9% Lead Local Flood Authority 21% 27% 18% 17% Local Planning Authority 4% 3% 4% 2% Highway Authority 5% 4% 6% 7% Local Authority (other) 4% 1% 5% 2% Developer 1% 1% 1% 1% Trade Association 1% Consultant engineer 30% 32% 28% 53% Consultant landscape architect 7% 4% 9% Research organisations 4% 1% 5% 1% Contractor 2% 1% 2% 4% NGO 1% 2% Individual 2% 1% 2% 1% Other (please specify) 7% 10% 6%

12 Survey Findings

13 Our Findings SuDS (C753) Local Authority SuDS Guidance Flood Risk Assessments (Site Specific & Strategic) Local Authority SuDS Policy National Planning Policy Framework & Planning Practice Guidance Susdrain website Local Authority Core Strategy/ Local Plan/ Area Action Plan/ Supplementary Planning Documents Environment Agency Guidance Sewers for Adoption Other CIRIA guidance Non-statutory Standards for Sustainable Drainage Systems Water and Sewerage Company Guidance Masterplans Designing for Exceedance in Urban Drainage: Good Practice (C653) Non-statutory SuDS Standards Practice Guidance (LASOO, 2015) British standards (BSI) Planning for SuDS making it happen (C687) Retrofitting to Manage Surface Water (C713) Site Handbook for the Construction of SUDS (C698) Model Agreements for Sustainable Drainage Systems (C625) Other non-statutory/technical guidance (please specify) 53% 62% 50% 59% 48% 54% 40% 48% 37% 51% 36% 47% 34% 38% 33% 48% 32% 34% 31% 53% 24% 36% 23% 35% 22% 37% 18% 37% 18% 30% 17% 16% 12% 16% 11% 9% 6% 10% 11% 17% 71% 88% SuDS is the most used resource, particularly among users who define their expertise level as Expert or Advanced. ICE members preferences are in line with Expert users. Total (305) Expert (92)

14 Our Findings SuDS is the most used resource

15 Our Findings SuDS and susdrain website highest rated in term of easiness of access, quality, quantity and up to date information. Among the other resources, quality and particularly quantity of information is lacking.

16 Our Findings The most common problems when looking for information regarding sustainable drainage? Not enough UK examples of good practice No clear route map for practical application in new build and/ or retrofit circumstances Information in a number of different places, hard to locate all relevant information 47% 45% 52% More felt among less experienced practitioners More felt among more experienced practitioners Information not specific enough for individual projects 44% Inconsistent/conflicting information 42% Unsure when guidance has been updated 36% Unsure where to look first 17% Too much information 12% Total

17 Our Findings Many different agencies writing their own version of guidance No certainty for who is going to own and operate the systems Total lack of consistent policy or practice from Cornwall council. Too many guidance documents saying different things and them not being realistic. We need real world SuDS, not 'best practice'! Guidance on adoption of suds systems Lack of clarity and routes for adoption and maintenance No real technical standard from government Lack of statutory standards to ensure consistent application Frequently site specific FRAs are not worth the paper they are printed on

18 Our Findings What are the barriers faced as a sustainable drainage practitioner?

19 Our Findings What are the barriers faced as a sustainable drainage practitioner?

20 Our Findings Developers not wanting to pay Developer resistance to SuDS Water companies do not permit land drainage to enter systems Requirement to maximise ecological benefits A change in legislation is required regarding the definition of a sewer Lack of Water Authority cooperation/understanding Lack of statutory standard to require implementation Lack of enforcement support by LPA and Building Control Inadequate national planning policy, and highly variable local planning policy

21 Our Findings Case studies of good practice Routemap linking all available documentation and the most current versions Cost/benefit tool to encourage asset owners to Routemap identifying the SuDS process from conceptual design to operation and maintenance Training events 44% 46% 40% 52% 42% 44% 32% 65% 56% 55% Which outputs/activities would be valuable to help overcome the barriers? Case studies and routemaps are perceived as valuable in overcoming barriers, particularly among less expert users. Online training resources General communications resources e.g. to inform presentations to the public or other stakeholders 27% 25% 42% 40% Total (220) Expert (96)

22 Our Findings Summary Adoption and Maintenance Achievable SuDS vs SuDS Nirvana Masterplanning provision for SuDS Different guidance in different areas Highways adoption Sewers for Adoption Lots of useful information available How to locate? Routemaps, please!

23 What do we do next?

24 Creation of Routemaps Defined steps Concept/ Strategy Design/ Planning Detailed Design Construct Adoption Maintenance Retrofit Monitoring

25 Creation of Routemaps Routemap example: Outline Design (in development) TITLE: Outline Design of SuDS Action Consider Concept/Strategy What national planning policy applies What local planning policy applies Planning requirements Establish environmental and design constraints Early engagement (pre-application discussions) Undertake stakeholder consultation Establish design criteria Assessment and design Identify storage, controls, runoff rates and discharge points Sensitivity testing and design for exceedence/ resilience Check amenity, biodiversity, water quality reqs have been assessed Solution Consider options for maintenance and adoption Detailed Design Obtain outline planning approval Resource NPPF PPG Nonstatutory standards NPPF SFRAs SWMPs SPDs Ground conditions & infiltration (BGS, BGS SuDS suitability map, BRE 365) EA Flood Zones, GWSPZ Maps, Surface water flooding maps Site masterplan WaSC LLFA IDB Highway Authority Local planning authority Utilities companies - existing infrastructure Sewers for Adoption LASOO & LLFA design guidance CIRIA C753 EA Climate Change allowances for FRAs UK SuDS Tool CIRIA SuDS FEH/ ReFH2 Hydraulic modelling packages (e.g. Micro drainage; Infoworks; Flow) Climate change allowances for FRAs CIRIA SuDS FD2320 (Flood Hazard) CIRIA C738? Designing for Exceedance CIRIA SuDS CIRIA SuDS LLFA guidance LLFA guidance Planning Portal PPG FRA Checklist EA Groundwater contamination

26 Creation of Routemaps Routemap example: Construction(in development) Construction Phase Action Consider Detailed Design Construction method Construction Planning Health & Safety Construction Programme Handover date Site Constraints Agree Health & Safety plan (Sub) Contractor selected Agree Construction Method Contract Liability Period Agree Construction Programme Inspection Programme Health & Safety Construction / Installation Construction Programme Construction Drainage Traffic Plan Inspection Final Inspection Site Handover Handover Documentation Construction Liabilities Period Defects Rectified? Yes Return of any bond Adoption Season Sequencing Resource Site constraints SuDS manual CIRIA Cnnnn Case Studies Construction (Design & Management) Susdrain CIRIA C739 CIRIA C698 Construction (Design & Management) C698 section 8 LLFA liaison CIRIA C698 C698 Pollution Prevention CIRIA C698 C698 Construction detritus can impact on SuDS performamnce C698 Compaction effect on infiltration Inspection Programme Building Control? Specialist Inspection? Documenta tion As built drawings Maintenance LLFA/LPA Approval Back to back from Contractor to Subcontractor C698 Section 8 LLFA Register of SuDS?

27 Creation of Routemaps Routemap example: Maintenance (in development) Maintenance Phase Action Consider LA/LLFA Adopted Maintenance Maintenance Programme Maintenance Maintenance Programme WaSC Adopted Asset Register Highways Adopted Maintenance Maintenance Programme Community adopted Maintenance Community Engagement Maintenance Programme Not adopted Residential Maintenance Maintenance Programme Not adopted Commercial Maintenance Maintenance Programme SuDS SuDS SuDS Case Studies SuDS SuDS Residents Management Committee SuDS Resource LA Maintenance Co. 3 rd party Maintenance Co. E.g. Australia Road 3 rd party Maintenance Co.

28 Creation of Routemaps Routemap example: Retrofitting (in development) Retrofitting of SuDS Action Consider Identify the need/ opportunity Is there a flood risk issue? Is work required on existing infrastructure Establish environmental opportunities and goals High level consideration of feasible options Undertake stakeholder consultation Establish design criteria Identify and initiate discussions with key stakeholders Identify and obtain funding Apply and secure funding Follow the SuDS design maps from outline design onwards Outline Design Process Resource SFRAs/ SPD SWMP EA and LA flood mapping S19 / historic flooding NPPF / PPG SFRAs Ground conditions & infiltration (BGS, BGS SuDS suitability map, BAE 365) EA Flood Zones, GWSPZ Maps, Surface water flooding maps Site masterplan WaSC LLFA IDB Highway Authority Local planning authority Utilities companies - existing infrastructure Sewers for Adoption LASOO & LLFA design guidance Sewers for Adoption EA Climate Change allowances for FRAs WASC EA Other internal LA / LLFA Departments Residents / commercial property owners / users EA Funding (FCERM-AG / GiA) LEP Funding Local Levy Funding Highways England LA in house funding Commercial funding / Developer contributions if appropriate WASC Contributions Detailed Design Process Construction Process Adoption Process Monitoring Process Refer to CIRIA C713 Retrofitting to manage surface water

29 Publication

30 Publication Continue with population of Routemaps Links to resources. Peer review Convert to pdf Publish on ICE website Optimise for desk top and lap top Target December 2017

31 Thank you David Smoker