SJR Technical Working Group March 25, 2004
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Transcript of SJR Technical Working Group March 25, 2004
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201• 529 • 5151www.hydroqual.com
SJR DO Depletion ModelingProgress Update
Andy Thuman, P.E. (HydroQual)Laurie De Rosa (HydroQual)
Russ Brown, Ph.D. (Jones & Stokes)
SJR Technical Working GroupMarch 25, 2004
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Modeling ApproachModeling Approach
Data compilation & review (Data Atlas) Started compiling data, atlas format – Russ Brown
DSM2-delta modeling (develops BC) Started developing BC interface
DWSC modeling (ECOMSED/RCA) Draft model grid developed
Upstream SJR modeling (DSM2-sjr) Adaptive/Corrective Management
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HydroQual Project StatusHydroQual Project Status
Reviewing reports/data from the DWSC and in upstream SJR
Generated a draft model grid for the hydrodynamic & water quality modeling
Started linking DSM2 model output to hydrodynamic model for BC
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Preliminary Model Grid
(Entire Study Area)
Preliminary Model Grid
(Entire Study Area)
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JerseyIsland
San Joaquin River
Turner Cut
Mossdale
Vernalis
Rough & ReadyIsland
HydroQual Model Grid & DSM2 Nodes
CoastLineECOM Model Grid
# DSM2 Nodes
3 0 3 Miles
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EW
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55Jersey Island to Turner CutJersey Island to Turner Cut
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JerseyIsland
San Joaquin River
Turner Cut
HydroQual Model Grid& DSM2 Nodes
CoastLineECOM Model Grid
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1 0 1 Miles
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66Turner Cut to DWSCTurner Cut to DWSC
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Turner Cut
Rough & ReadyIsland
HydroQual Model Grid& DSM2 Nodes
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0.7 0 0.7 Miles
CoastLineECOM Model Grid
# DSM2 Nodes
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DWSC to VernalisDWSC to Vernalis
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Mossdale
Vernalis
Rough & ReadyIsland
HydroQual Model Grid& DSM2 Nodes
CoastLineECOM Model Grid
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2 0 2 Miles
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SOD & Nutrient FluxesSOD & Nutrient Fluxes
Sediment oxygen demand (SOD) Sediment nutrient fluxes
NH3 – typically from sediment into water
PO4 – varies depending on water DO level
NO3 – typically from water into sediment
N2 – typically from sediment into water
Measured rates will be used to calibrate the sediment flux submodel
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Nitrogen
KM – mineralization rate of OrgN to NH3
Knitr – nitrification rate of NH3 to NO2+NO3
Kdenitr – denitr. rate of NO2+NO3 to N2 gas Phosphorus
KM – mineralization rate of OrgP to PO4
233 NNONHOrgN denitrnitrM KKK
4POOrgP MK
Eutrophication: NutrientsEutrophication: Nutrients
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Carbon Kd – carbon (BOD) oxidation rate
Reaeration KL – oxygen transfer coefficient (L/T) Wind & velocity dependent
All rates are temperature dependent
nconsumptioOBODCarbon Kd2)(
Carbon (BOD), ReaerationCarbon (BOD), Reaeration
H
KK La
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Algal KineticsAlgal Kinetics
Algal growth is a function of: Temperature Available light Available nutrients (NH3, NO2+NO3 & PO4) Algae produce oxygen during photosynthesis
Algal mortality occurs due to: Respiration Zooplankton grazing Algae consume oxygen during respiration
Algal death also recycles nutrients & OrgC
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Algal Kinetics (cont.)Algal Kinetics (cont.)
Algal growth & respiration rates Can be estimated from light & dark bottle
studies, literature, previous modeling studies, literature
Zooplankton grazing rate Estimate from zooplankton levels, model
calibration Is information available on algal species?
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Water Quality Model InputsWater Quality Model Inputs
Solar radiation / photoperiod Measurements
Secchi depth / light extinction Measurements
Settling rates for algae, part. N/P/C Literature, measurements, calibration
N/C, P/C, C/Chla ratios for algal kinetics Literature, measurements, calibration
Reaction rates Literature, measurements, calibration
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Questions & AnswersQuestions & Answers