Catchment Management Plan - Hunter Water

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637 6000williams river2Sinclairs Hill$Raymond Terrace/ HUNTER384 000388 000392 000396 000LegendGrahams Town Study AreaGrazing AreasRoadsRiversPathogens Risk Map (MCA)ValueHigh : 229.65Low : 124.092Wallaroo Mountain2oMedowie State ForestKings Hill$GRAHAMSTOWNMedowieDAMoMoffats Swamp Nature Reserve384 000 388 000 392 000 396 000williams riverItalia RdPacific HwyWattle Flat RdRichardson RdMedowie RdFerodale Rd© WorleyParsons Services Pty LtdWhile every care is taken to ensure the accuracy of this data, WorleyParsons makes no representations orwarranties about its accuracy, reliability, completeness or suitability for any particular purpose and disclaimsall responsibility and all liability (including without limitation liability in negligence) for all expenses, losses,damages (including indirect or consequential damage) and costs which might be incurred as a result of thedata being inaccurate or incomplete in any way and for any reason.WATER CORPORATION639 2000638 8000 639 2000638 4000 638 8000638 0000 638 4000637 6000 638 00000 1.5 3 KmSCALE-1:60,000 (at A3)Map Grid of Australia (Zone 56)Geocentric Datum of Australia 1994A 28/06/2010 Issued for squad check EY RBRev Date Revision Description ORIG CHK ENGQAAPPDGRAHAMS TOWN CATCHMENT AREAGrazing ModulePathogens Risk MapProject No: 301010-00649 Figure: 00649_GrM_Pathogens_Risk_Map.mxdCompiled by GEOMATICS SOUTHERN OPERATIONSF:\HunterWater\GT_Layouts\00649_GrM_Pathogens_Risk_Map.mxdFigure 20: Highest risk of pathogen input from grazing in the Grahamstown CatchmentCATCHMENT MANAGEMENT PLAN . ssS . 001 . JUNE201028
Using this model it is possible to beginanalysis of the areas that pose thegreatest risk to drinking water quality.For example, in Figures 18-20 the grazingareas that are the highest risk to waterquality from nitrogen, phosphorus andpathogens are shown in red. It can beseen that the south-east corner mightbe more effectively targeted for nutrientand pathogen reduction measuresfrom grazing above other parts of thecatchment.Ultimately, there will be another seven‘modules’ (such as Impact of roads andStormwater runoff) overlayed upon thecatchment maps. The final output will thenbe broken up into smaller drainage units thatcan be colour coded to represent risk andhelp prioritise catchment remediation works.3.1.5 Hunter Water’s vision toaddress catchment risksusing the SWISSThe top catchment priorities areranked using SWISS and fundingto address catchment prioritiesis requested in the next pricesubmission.Priority high risk areas are sequentiallyaddressed with on ground work, themodel is refined and rerun.The SWISS catchment model becomesan industry leading package and isintegrated into many land use changedecision making processes.HORIZON 1 HORIZON 2 HORIZON 3►This price path 2010 - 2013 Next price path 2013 - 2017 Our vision for the future 2017 - beyond►►Part 4: The action plan 2010-2013 explains in more detail how Hunter Water will move towards this vision.3.2 Element 2: Have effectivelegislationPurposeTo strengthen the legislationwithin the drinking watercatchment areas whereby new orproposed activities on land can bemanaged with a focus on water qualityprotection.PrécisA catchment’s water quality and landuse are inextricably linked. There aresome legislative controls which applyto catchments that require drinkingwater quality to be considered as aprimary concern. Hunter Water willstrengthen the legislation and ensurethat it is well integrated into local andregional planning instruments.3.2.1 Current status of landuse planning and developmentcontrol in catchmentsThe quality and quantity of source waterCATCHMENT MANAGEMENT PLAN . ssS . 001 . JUNE2010is largely dependent upon the activitiesthat occur in the catchment. Landuse planning legislation that ensuresdevelopments consider the quality andquantity of water are essential to maintainIncrease in the difficultyof maintaining effectivetreatmentIncrease in risk ofpollutants enteringtreatment systemIncrease in health riskto consumersFailure to implementappropriate planningcontrolsDecrease in the reliabilityof the water sourceor improve raw drinking water quality.Poor development choices in drinkingwater catchments can have the followingimpacts on drinking water quality 6 :6 Hurlimann, Ford (Feb 2010) Development control within catchments, Water magazine, AWAIncrease in costand complexity ofwater treatmentAbandonmentof catchments inextreme cases29
Page 2 and 3: Table of contentsMessage from the M
Page 4 and 5: Executive SummaryWater supply busin
Page 6 and 7: Part 1: Introduction1.1 DOCUMENT Pu
Page 8 and 9: “Preventive measures by their1.6
Page 10 and 11: Part 2: Our drinking water catchmen
Page 12 and 13: 2.3 A snapshot of Hunter Water’sc
Page 14 and 15: NBarrington TopsNational ParkChiche
Page 16 and 17: 2.6 Grahamstown DamCatchmentarea115
Page 18 and 19: 2.7 The Tomago SandbedsCatchmentare
Page 20 and 21: 2.8 The Tomaree (Nelson Bay) Sandbe
Page 22 and 23: 2.10 The Paterson andAllyn RiversCa
Page 24 and 25: 3.1 Element 1: Identify thetop haza
Page 27: 637 6000williams river2Sinclairs Hi
Page 31 and 32: 3.2.4 Hunter Water’s visionfor le
Page 33 and 34: Freudenberg (1999) 9 recommendsthe
Page 35 and 36: 3.4.3 Recent improvementsto the mon
Page 37 and 38: 3.5.2 Hunter Water’s vision forca
Page 39 and 40: 3.7 Element 7: EngagE thecommunityO
Page 41 and 42: Appendix A:Items to observe during
Page 43 and 44: Appendix C:The Land newspaper adver
Page 45 and 46: Appendix E:Graphic used to illustra

Catchment Management Plan - Hunter Water

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