Presentation on theme: "SuDS Kerrie Ginns, Andrew Leadbetter & Paul Burrows Environment Agency"— Presentation transcript:
1SuDS Kerrie Ginns, Andrew Leadbetter & Paul Burrows Environment Agency Flood & Water Management Act - DefraSurface Water Drainage - DefraFlood Risk RegulationsPreliminary Flood Risk Assessment GuidanceExamples of Local Flood Risk Partnerships - IDeA websiteKerrie Ginns, Andrew Leadbetter & Paul BurrowsEnvironment AgencyJuly 2010
2Green Infrastructure and SuDS Green Infrastructure overviewWhy Green Infrastructure is important to the Environment AgencyGreen Infrastructure = SuDSLocal flood risk, current policy and future challenges
3What is Green Infrastructure? Green Infrastructure (GI) is a concept that describes a network of inter-connected, multifunctional green and blue spaces designed to meet the environmental, social and economic needs of a community.
23Why is Green Infrastructure important for the Environment Agency? 1. GI is essential for sustainable development and for the delivery of sustainable communities.2. We support the enhancement and increased development of well planned and managed GI networks.3. New developments should include sufficient GI to support community and environmental needs.4. Where appropriate and feasible, GI should be retrofitted into existing developments.5. For maximum effect, GI should be strategically planned and managed.
24Why is Green Infrastructure important for the Environment Agency? 6. Partnership working is essential for successful GI planning, development and management.7. GI is an important and useful concept for the Environment Agency.8. We should encourage the enhancement of blue spaces within all new and existing developments and we should recommend safeguarding floodplains from development by highlighting their multifunctional and flood storage benefits.9. The coast and surrounding coastal environments are valuable components of GI networks.10. GI has an important to play in responding to play in responding to climate change.
28Green Infrastructure = SuDS Essential for sustainable developmentCan be retrofitted into existing developmentsPlays an important role in responding to climate change
29SuDSSustainable Drainage Systems (SuDS) are designed with three objectives in mind:to control the quantity and rate of run-off from a development;to improve the quality of the run-off;to enhance the nature conservation, landscape and amenity value of the site and its surroundings.SuDS deal with run-off as close to its source as possible and balance all three objectives, rather than focussing only on flood prevention.
31Economic benefits of SuDS Experiences from UK, Europe and the US have shown that when properly planned and implemented, SuDS is no more expensive, if not cheaper than conventional drainage.For schemes where cost checks have been carried out, SuDS is nearly always cheaper to construct and maintain.
32The savings accrued (both fiscal and social) are attributed to the following factors: - Absence of conventional kerbs and gullies- Reduced need for pipes, surface water sewers, manholes etc and absence of deep trench excavations- Absence of storage tanks, leading to reduced excavations and construction costs- Avoiding the need for pipe connections to distant outfalls- Avoiding the costs involved in routing pipes across land owned by others- Simpler construction- Reducing the economic and social cost of flooding- Limiting the risk of sewage discharge during exceptional high rainfall reduces risk to human health- Avoiding expensive connections to the local water authority.- Reducing maintenance costs
33Local Flood Risk: current policy, future challenges
34Properties at risk of flooding in England & Wales 23.8m properties not susceptible to flooding5.5m properties at risk of flooding>1m properties at risk from river, coastal and surface water flooding>2.6m properties at risk of river and coastal flooding>3.9m properties at risk of surface water flooding3434
35Flood and Water Management Act Impact on surface waterSections 1-6:LLFAs to manage local flood riskSections 7-12:National and Local StrategiesSections 13-14:Duty to cooperate & power to share informationSchedule 1:Third party assets
36FWMA and sustainable drainage Schedule 3: Sustainable drainageSection 42: Automatic right to connect
37Flood Risk Regulations - Timeline Preliminary Flood Risk Assessments published Dec 2011Flood Risk Areas - Management Plan201520092009201120132015Dec 2011Flood Risk AreasidentifiedDec 2009Flood Risk RegulationsImplementationDec Flood Risk Areas - maps
38EA Strategic Overview objectives Outcome:Flood risk from all sources is adequately assessedand managed using a strategic, risk-based approachTo be achieved by:continued delivery of flood risk management for main rivers and sea, and the oversight of reservoir safetysignificantly improved flood risk management for surface water, groundwater and ordinary watercourses
39Local Flood Risk Roles Lead Local Flood Authority Lead delivery of local FRMBuild partnershipsSWMPs and SUDsLocal StrategyProduce Flood Risk Regs assessment-map-planEnvironment AgencySet the national frameworkSupport LLFAsGuidance, data and toolsFlood warningImplement relevant SWMP actionsQuality AssuranceRFCCsRole advising on quality and delivery
44DiscussionWhat progress is your Authority making in setting up partnerships, are planners linked into these?How well have the requirements of the Act and Regs been communicated within your Authority?What ideas have been discussed around implementation of your new roles in sustainable drainage?