using natural processes to reduce flood risk · using natural processes to reduce flood risk ......
TRANSCRIPT
Usingnaturalprocessestoreducefloodrisk
experiencesfromTrentRiversTrust…….
RuthNeedham,TrentRiversTrust
ExperiencesfromTrentRiversTrust
• Whatis‘WorkingwithNaturalProcesses’(WWNP)• WhydoweneedWWNP?• WhyisitofinteresttoTrentRiversTrust?• Howtogoaboutit• Somecasestudies• Asummary
Whatis‘WorkingwithNaturalProcesses’
Inthecatchment
Changingandmanagingthesurface(increaseporosity)
Promotinggoodsoilmanagement,reducingcompaction
Impedetheflow
Createstorage
Sourcecontrol– workwheretherainfalls
AppliesinruralAND urbanareas
Atorinthe
channel
Slowornarrowtheflow
Increasetheroughness(friction)
Reducetheconveyance(speed)
WhydoweneedWWNP?Rangeofbenefits• Floodrisk• Improvedwaterquality• Createshabitat• Reduceserosionandsoilloss• Providesafocusforpeopleandcommunities• Cheapertobuildthantraditionalfloodmanagment schemes• Legacy?Longtermawareness?
Needtobroadenourapproachtowatermanagement• Increasingfloodrisk• Channelsatcapacity• Needmorethan‘defendanddredge’• Climatechange• Soilloss• Incorporatearangeoftechniques• RequiresaCatchmentBasedApproach• Involvespartners– getseveryonethinkingaboutfloodrisk
WhyisitofinteresttoTrentRiversTrust?
• Deliversarangeofwaterbasedbenefits
• Easierandcheapertoworkwithsmallervolumesofwater
• Workatrangeofscales;site,landscapeandcatchment.Playstoourstrengths(workwithfarmers,communities,partners)
• Createschemesthatcomplimentthelandscape,bespokesolutionforindividualsites.Solutionsareunobtrusive.
Howtogoaboutit?Whatarethepitfalls?• Allowplentyoftimeforplanning• Funding– standardfloodriskfundingsourcesnotyettailoredwelltoNFM• Partnersupport– workwithrangeofstakeholders• Uselocalknowledge,carryoutadeskstudy• Makethemostofthedata(+/- ofmodelling)• Secureagreementfromlandowners• Becreativeaboutincentives• Carryoutsurveyswellinadvance• Thinkaboutmaintenanceaspartofyourdesign• MayrequireLandDrainageConsent(LLFA)andPlanningPermission(LPA)• Includeanevaluatingandmonitoringplan,canbeexpensive
SCIMAPoutputs– highlightswherewateraccumulates
CaseStudySouthwellCatchmentProject
• Scopingandfeasibilityproject
• Farmadvisoryproject
• Capitalprojects
WillowBrookSitevisit!
CaseStudy SoarNFMproject
CaseStudy
LeicesterSUDS’n’SchoolsProject ShadyLaneArboretum,Leicester
Britain in Bloom New Landscape of the Year 2015 (East Midlands)
RainGardenattheStrutts Centre,BelperCaseStudy
LeisureCentre,MeashamCaseStudy
Front
Back
Before After
Insummary• Lotsofopportunities• Becreative• Needtoworkinpartnership• Engagewithcommunitiesandlandowners• Startplanningearlyon,don’tunderestimatepotentialforcomplications• Thinkaboutthemaintenance• Constructioncheaperthantraditionalsolutions• Longtermbenefits• Bringaboutsomeinspiringsites
