Six areas where water companies interests align with the CaBA (there will be more!) David Johnson C.Eng and MICE. Rivers Trust.

Q1: Does catchment management work? Think SAB Miller

Q2: Do you have enough data to understand water company issues? There is lots of evidence that can be used.

Q3: Time to talk to the Engineers? Is catchment management + engineering the way forward?.

1) Sewer capacity and CSOs. The problem a CaBA could help with.

Ø Peak runoff exceeding hydraulic capacity of the sewer => Ø Sewer flooding or Ø Discharges from CSOs.

Ø Not all flooding can be helped by NFM measures. Ø Design the NFM to suit the problem.

1) Sewer capacity and CSOs. Data and tools.

Ø CaBAdatapackageØ Talktotheengineers,whatyouwantisalistofDG5sandproblemCSOswhereupstreammeasurescouldhelp.Ø Needthesewershedfortheissue(assetdatabase)

DefraUrbandemonstrator

1) Sewer capacity and CSOs. Case study and potential trip hazards.

Ø NFMmodellinginManchesterhelpstoquanGfythepotenGalbenefitofSuDSandfocuseffortwhereitcouldmakethemostdifference.Ø 10%reducGoninpeakrunoffonagoodday.Ø Engineersknowwhichissuescouldbehelpedbyreducingpeakrunoff.Ø MulGplebenefits(NIAandGreeninfrastructure)Ø WhataboutGWflooding,donotswaponeproblemforanother

1) Sewer capacity and CSOs. Case study and potential trip hazards. Strategic approach….

Mapsiden*fywhereSuDShavethegreatestpoten*al

NaturalCourse2017

1) Sewer capacity and CSOs. Case study and potential trip hazards.

NaturalCourse2017

2) Nitrate in groundwater. The problem a CaBA could help with. Ø GWisthebestsourceofdrinkingwater,lowcarbonandminimaltreatment.Ø Nitratecomesfromag,urbanandaerialdeposiGonØ MostofthefocusisonagriculturallandmanagementØ Groundwaterqualityiscomplexsoadiagramishelpful=>

EAWaterResourceStrategy2008

the umbrella body of the rivers trust movement

where there’s water, there’s life

HowthenaturalGWsystemworks:Groundwaterqualityisaffectedbylandmanagementandabstrac*onmanagement.

2) Nitrate in groundwater. Data and tools.

Ø SafeguardZones(canbeconfusing)Ø NEAPNnitrateloadØ FARMSCOPERØ DefraevidencereviewØ WatercompanieshavealistoftargetgroundwatercatchmentsforNØ Whataboutmonitoring?

2) Nitrate in groundwater. Case study and trip hazards

Ø 10%onagoodday!BerealisGc.Covercropcalc.Ø ButcandoalotmoreinsmallareasandiftherearehighlossacGviGes.Ø Hierarchyofasksbasedon40yearsofresearch!Ø DiluGonisthesoluGontopolluGon…Ø MulGplebenefitsfrommanyofthebestmeasures….Ø OneofthebestcasesforaCaBA

Manuremanagement.MinimalmanureinGWcatchment=>NoautumnapplicaGon=>LowNmanure=>slurryorpoultrylicer.Autumncover.Earlyautumnestablishment=>Covercrops=>‘greeningup’=>lateharvestbaresoil.Nutrientapplica*on.Low-opGmalnutrientapplicaGon=>Precisionnutrientmanagement=>fullevaluaGonofmanures=>InsuranceapplicaGonforyieldorquality.

Landuse.Woodland=>permanentpasture=>lowleachingcrops=>highleachingcrops=>plough-uporoutdoorpigs

2) Nitrate in groundwater. Case study and trip hazards (hierarchy)

3) Pesticide in SW. The problem a CaBA could help’ Ø PesGcidemoreofaprobleminSW(drinkingwater)Ø Veryexpensivetreatment,OzoneandGAC.Ø Catchmentmanagementisaboutusage,GmingandgoodpracGce.

CSFEvaluaGon2014

3) Pesticide in SW. Data and tools Ø SgZinCaBAdatapackageØ PesGcideusagesurveyØ LocalfarmeroragronomistsurveysØ FARMSCOPERandScimap(foolserrand?)Ø Itisall(wellnearlyall)aboutusage…

3) Pesticide in SW. Drinking water. Case study and trip hazards.

Ø Highlycomplex(2stepsforward1stepback)Ø VariesyearonyeardependingonusageandGmingandsoilcondiGons/weatherØ NeedsalongtermapproachwhichaimstoreduceusageofeachacGveingredient.Ø Movetowardscontractors?Ø WhatarethemulGplebenefits?Ø OperaGngrules+CM

4) Phosphate in surface water. The problem a CaBA could help with

Ø NewPstandardsinSWmeanthatPstrippingwillberequired.Ø ThesmallertheworksthemoreexpensiveeachkgofPistoremove.Ø CanweremovePfromlandmorecheaplyusingaCaBA?Whatistheopportunity?

• NewPstandardsmeanthatPstrippingwillberequired.

• ThesmallertheworksthemoreexpensiveeachkgofPistoremove.

• CanweremovePfromlandmorecheaply?

• 10%onagooddayin20yearsGme…..

• TakesalongGmeduetosoilstore.

• Takesevenlongerduetosedimentstore.

• MulGplebenefits(soilretenGon,reducedagcosts,sedimentreducedandhabitatcreated.

4)Phosphateinsurfacewater.Dataandtools

• CaBAdatapackage• PSYCHIC• SAGIS• CaMMPHub• FARMSCOPER• Scimap

4)Phosphateinsurfacewater.Casestudy

M o s t effectivemeasure

Measure P e r c e n t a g e improvement in phosphorus lost to the river

I s i t c o s t e f f e c t i v e ? Ranked mos t costly (5) to least costly (1)

1 Use slurry injection application techniques

20% 5

2 Do not spread slurry or poultry manure at high-risk times

10% 1

3 Construct bridges for l i v e s t o c k c r o s s i n g rivers/streams

7% 3

4 Capture of dirty water in a dirty water store

7% 4

5 Fence off rivers and streams from livestock

6% 2

4)Phosphateinsurfacewater.Casestudyandtriphazards(thinkabout+metoimprove)

1 2 3 4 5 Nitrate

(%) 12 5 5 5 4

Phosphorus (%) 20 10 7 7 6

Sediment (%) 0 0 0 0 0

Ammonia (%) 25 0 0 0 0

0

5

10

15

20

25

30

Nitrate (%)

Phosphorus (%)

Sediment (%)

Ammonia (%)

5) Low flows and reducing abstraction. The problem a CaBA could help with.

Ø EveryMl/dayofwaterisworth~£1Mperannumtoawatercompany.Ø ReducingabstracGonisnotideal.Ø Canwemakeriversresilienttolowflowsratherthanputwaterbackinthem?

EnvironmentAgencyWaterResourcesStrategy,2008

5) Low flows and reducing abstraction. Data and tools.

Ø CAMSwaterresourcestatus.Ø AbstracGonsØ Lowflowstudyareas?Ø TheEAweregoingtopublishguidance?Ø TherearesomecasestudiesinthenSE

6) The eel regulations. Could a CaBA help?

Ø WatercompanyassetshavetocomplywitheelregulaGons.Ø ConsultantreportsthathighlightstructureswithlicleupstreamhabitatØ Amorecatchmentbasedapproachtomaximiseeelhabitataccess.

6) The eel regulations. Data and tools and case study.

Ø Prioritybarriers(EA)Ø GISmappingtoidenGfyamountofupstreamhabitat.Ø PopulaGon,habitatandpass-abilitystudies.

Q1: Does catchment management work? Ø  Modest improvement Ø  But there is not an alternative....think SB Miller

Q2: Do you have enough data to understand water company issues?

Ø  CaBA data package is a start but there is alot more out there.

Q3: Time to work with the Engineers. Catchment management + engineering is the way forward. Ø  Engineering will do the heavy lifting. Ø Engineers like numbers and evidence Ø  They also like solving problems

1)NFMsewercapacityandCSOs.Dataandtools.

Whatdataisavailable?• CaBAdatapackage• Talktotheengineers,whatyouwantisalistofDG5sandproblemCSOswhereupstreammeasureswillhelp.

• Needthesewershedfortheissue

Whattoolsareavailable?•  TUFLOWespifitispartofaSWAMPassessmentwithaboveandbelowgroundinfrastructure#Infoworks#

•  JFLOW.UsedforSWfloodmapsandNFM

•  Another

Graphof

FlowvsTime

atLocaGonA

A

3)PesGcideinSW.Drinkingwater

• Whatdataisavailabletoyou

• SgZinCaBAdatapackage• PesGcideusagesurvey• Localfarmeroragronomistsurveys

• Itisall(wellnearlyall)aboutusage…

• Whattoolsareavailable?• Farmscoper• Scimap?• Modelsnotashelpfulforsuch

3)PesGcideinSW.Theproblem

• PesGcidemoreofaprobleminSW(Gme)

• Veryexpensivetreatment,OzoneandGAC.

• CatchmentmanagementisaboutamountandGming

• Notthatmuchofaproblemfortheecology?