2 - TMDL Overview PPT
TMDL OverviewLake Tahoe TMDL SymposiumPresented by:Dave RobertsLahontan RWQCB
Presentation OverviewProvide overview of TMDL programIntroduce the TMDL development phasesDiscuss the use of Clarity Model fordevelopment of load reduction strategiesDiscuss the use of planning tools and theirpotential use in Implementation and AllocationPlanning
TMDL BackgroundTotal Maximum Daily Load Water Quality Restoration PlanMandated by Federal Clean Water Act since 1972Section 303(d) of the CWA requires states toidentify and list impaired surface waters
Parts of a TMDLProblem StatementNumeric TargetSource AnalysisLinkage AnalysisMargin of SafetyPollutant Load AllocationsImplementation Plan (CA)Monitoring Plan
TMDL Development PhasesPhase IProduct: Technical TMDL- Determines Current Loading- Determines Basin-wideLoad Reduction NeedsPhase IIProduct: Final TMDL- Identify Load Reduction Possibilities- Allocates Pollutant Load Reductions- Implementation Plan- TMDL Implementation Tool BoxPhase IIIProduct: Implementation and Monitoring- Basin-wide Management System- Adaptive Management System
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Established Water Quality ObjectivesLahontanSecchi disk transparencyshall not be decreased belowthe levels recorded in 1967-71 30 meters ( 97 ft.)TRPAWinter (December-March) mean Secchidisk transparency: 33.4m. ( 110 ft.)NDEP/LahontanThe vertical extinction coefficient must be lessthan 0.08 per meter when measured at any depthbelow the first meter
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Major Source CategoriesAtmospheric By primary source In-basin vs. out-of-basinUpland Urban - commercial, residential, transportation, recreation Forested - undisturbed, roads/trail, fire, ski areas,management actionGroundwaterStream Channel Erosion Load predictions from all 63 tributaries* Fine Particle loadings for all sources types
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Linkage ModelsAtmospheric UCD - MM5 historic climate reconstructionUpland Tetra Tech - LSPC (Hydrology and Loading) Hydroikos - Statistical Modeling Geosyntec - SWMM (Pilot BMP modeling)Groundwater USACE - groundwater loading modelStream Channel Erosion National Sedimentation Laboratory - CONCEPTS/AnnAGNPSLake Response UCD - Lake Tahoe Clarity Model (hydrodynamics, water quality,optical properties)
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Assimilative CapacityThe amount of a contaminant loadthat can be discharged to a specificwater body without exceeding waterquality standards.
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Technical TMDLPrimary Products:1) Accurate estimation of current loading2) Assimilative capacity TMDL3) Basis for establishing load reductionallocations and implementationplanning4) Provides range of constituent loadreductions for achieving desired clarity
Conceptual Load Reduction Model% Sediment Reductionneductio90 100Rneg% Nitro60 70 80504020 300 10Parameters are forillustrative purposes only01020304050607080901000 1020% Pho 30 40 50 60sphorus Re 70 80 90 100duction20- 25 Red25.5-28 .Yellow28.5-32.5 .Blue33 & above.Purple
Alt.ImplemSecchi Depth (m)entationConceptual Clarity Improvement Curves30 mAAlt.BAlt.20 m01020Time (yrs)Parameters are for illustrative purposes only304050C
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
TMDL Implementation Tool BoxWatershed ModelClarity ModelPHASE ILand-use MapsAtmospheric DepositionGroundwater LoadingStream Channel ErosionTIIMSUrban HydrologyBMP ModelingBasin-wide LYDARStorm Water Master Plans?Reduction Estimation MethodsLoad Reduction MatrixPHASE IINew TechnologiesPollutant Trading PotentialPollutant Tracking SystemPROPOSED
Example Load Reduction MatrixLoad Reduction Opportunities EffectivenessURBANU-1InfiltrationU-2Wetland TreatmentU-3Source ControlU-4Chemical EnhancementATMOSPHERICA-1Vehicle Emission ControlA-2Wood Stove ManagementA-3Out-of-Basin Source ControlA-4Dust ManagementSTREAM CHANNELSST-1 Stream RestorationST-2 Bank StabilizationST-3 Hydrological ControlsGROUND WATERGW-1 Fertilizer ManagementGW-2 Source ControlFORESTED AREASFA-1 Road ManagementFA-2 Trail ManagementFA-3 Fire tc.4769 2718tbdtbdtbdtbdxxxxxxxxkg/yrkg/yrkg/yrkg/yr4527 4392tbdtbdtbdtbdxxxxxxxxkg/yrkg/yrkg/yrkg/yr775 532tbdtbdtbdxx kg/yrxx kg/yrxx kg/yr38 72tbdtbdxx kg/yrxx kg/yr657 654tbdtbdtbdxxxxxxxxTotal Possible Load Reductionkg/yrkg/yrkg/yrkg/yrParameters are for illustrative purposes only
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Watershed ModelLand-use Classifications!"!#! ! %! &!'' ('')'' (*! ,!-!.0 1(/"/!#//%/2/& 3)
Example Load Reduction DistributionsAUrban (34%): U-2, U-6, U-14, U-26, U-56, U-78Atmospheric (12 %): A-3, A-7, A19, A43Stream Channels (20%): ST-10, ST-34, ST-43Ground Water (12%): GW-2, GW-4, GW-18Forested Areas (22%): FA-11, FA-23, FA-25TOTAL REDUCTION 15,000 kg tbd/yrBUrban (20%)Atmospheric (25%)Stream Channels (25%)Ground Water (15%)Forested Areas (15%)TOTAL REDUCTION 15,000 kg tbd/yrCUrban (20%)Atmospheric (15%)Stream Channels (30%)Ground Water (25%)Forested Area (15%)TOTAL REDUCTION 15,000 kg tbd/yrParameters are for illustrative purposes only
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Load Reduction Opportunities EffectivenessURBANU-1InfiltrationU-2Wetland TreatmentU-3Source ControlU-4Chemical EnhancementATMOSPHERICA-1Vehicle Emission ControlA-2Wood Stove ManagementA-3Out-of-Basin Source ControlA-4Dust ManagementSTREAM CHANNELSST-1 Stream RestorationST-2 Bank StabilizationST-3 Hydrological ControlsGROUND WATERGW-1 Fertilizer ManagementGW-2 Source ControlFORESTED AREASFA-1 Road ManagementFA-2 Trail ManagementFA-3 Fire tc.4769 2718tbdtbdtbdtbdxxxxxxxxkg/yrkg/yrkg/yrkg/yr4527 4392tbdtbdtbdtbdxxxxxxxxkg/yrkg/yrkg/yrkg/yr775 532tbdtbdtbdxx kg/yrxx kg/yrxx kg/yr38 72tbdtbdxx kg/yrxx kg/yr657 654tbdtbdtbdxxxxxxxxTotal Possible Load nts30 m20 mkg/yrkg/yrkg/yrkg/yr0 10 20 30 40 50Time (yrs)SelectDistribution AdaptiveManagementFrameworkStakeholderInput
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad PlanIDMeasurableIndicatorsImplementation andMonitoringPHASE IIIDevelopMonitoringPlan
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Indicators, Milestones and ObjectivesIndicators Provide short-term measurable indicators of progress I.e. BMP performance, project load reductionsMilestones Sets measurable performance goals at predetermined timeintervals Developed with linkage models i.e. Two/Five/Ten year load reduction goals, number of BMPsinstalled, funding goalsObjectives Long-term water quality goals Attainment of water quality goals and thresholds
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
Monitoring Plan1) Identify appropriate indicators and milestones2) Track source load reductions, indicators andmilestones over time3) Account for variability4) Account for resource availability5) Integrative measures
PHASE IEstablishedWater nicalTMDLPHASE IIInitiate Phase IIProjects(Tool Box)DevelopLoad ReductionDistributionsDevelopFinalTMDLSelectLoad lementation,Monitoring & RefinementPHASE III
ImplementationPlanPerformance Evaluation ProtocolScienceIndicatorsMilestonesSource LoadReductionIndicatorsTotal entMilestonesImplementationInsufficient Number of ProjectsEffectiveness Less than NeededReduction Strategy UnrealisticRegulation Ineffective(e.g. restoration efforts not meetingexpectationHas desiredclarity beenachieved ?YESManagementWater BodyIndicators &MilestonesAre milestonesand indicatorsbeing achieved ?Review Model AssumptionsUpdate Model Based on New ScienceModeling Adjustments(e.g. expectations based on scientificpredictions may be incomplete)AnnualSecchiObjectiveInsufficient FundingAdministrative/Management SupportAgency Cooperation(e.g. modify implementation planNONOYESClarity measurementas predicted ?YES
Lake Tahoe TMDL TimelineInitiateResearch PlanSeptember 2001 - March 2002March 2002 December 2004Research & DataCollectionAugust 2002 April 2005TechnicalTMDL DevelopmentSummer 2005Technical TMDLImplementation PlanningOctober 2003 - 2006Policy Development2005 & 2006Final TMDL toRegional BoardSummer07- 01pSeJ20anJ-03naJ- 04naJ- 05naJ-06naJ-07na
Indicators, Milestones and Objectives Indicators Provide short-term measurable indicators of progress I.e. BMP performance, project load reductions Milestones Sets measurable performance goals at predetermined time intervals Developed with linkage models i.e. Two/Five/Ten year load reduction goals, number of BMPs installed, funding goals
2.3 program and project level analyses 7 2.4 purpose of ceqa 8 3. tmdl overview and program objectives 8 3.1 introduction – legal background 8 3.2 project purpose, tmdl goals, and water quality objectives 10 3.2.1 project purpose 10 3.2.2 tmdl goals 10 3.2.3 wate
Refer to Publication Number 00-03-006. . to calculate the fecal coliform TMDL target on the lower Nooksack River.37 Figure 13. Estimated percentage of fecal coliform loads from lower Nooksack sub-basins after TMDL targets are met. Load r
A TMDL identifies the amount of pollution control needed to maintain compliance with standards and includes an appropriate margin of safety. The focus of the TMDL is reduction of pollutant inputs to a level (or "load") that fully supports the designated uses of a given waterbody. The mechanisms used to
EEE Consulting, Inc. Piedmont Virginia Community College CHESAPEAKE BAY TMDL ACTION PLAN (2013‐2018 MS4 General Permit) This plan satisfies the requirements of Section I(C) of the MS4 General Permit (9VAC25‐890‐40) for Special Conditions for the Chesapeake Bay TMDL.
EEE Consulting, Inc. Germanna Community College CHESAPEAKE BAY TMDL ACTION PLAN (2013‐2018 MS4 General Permit) This plan satisfies the requirements of Section I(C) of the MS4 General Permit (9VAC25‐890‐40) for Special Conditions for the Chesapeake Bay TMDL.
Lower Cape Fear River Basin Cape Fear DO Issues by Jim Bowen, Assoc. Professor Civil Engr. Dept., UNC Charlotte Cape Fear Basin TMDL Conference Raleigh, NC September 9, 2003. Outline of Talk 1.Water Quality Models - The Analysis Tool of the TMDL Analysis 2.An Example TMDL - Neuse River Estuary,
the Ballona Creek Trash TMDL and the Los Angeles River Trash TMDL in 2001. These TMDLs have subsequently been amended in 2004 and 2007 (LARWQCB, 2004; LARWQCB, 2007a). The Los Angeles River and Ballona Creek were the first TMDLs to be approved by the LARWQCB with a final target of zero trash. Other trash TMDLs for water bodies within the City .
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