3-dimensional hydrodynamic, sediment transport and water ...hydrodynamics sediment transport water...
TRANSCRIPT
US Army Corps of Engineers
BUILDING STRONG®
3-Dimensional Hydrodynamic, Sediment
Transport and Water Quality Model
Framework to Support Resource
Management Planning for the Sacramento
San Joaquin River Delta
S. Lu, P. Craig, C. Wallen, Z. Liu, A.
Stoddard, W. McAnnally and E. Maak
BUILDING STRONG®
Goals for Resource Management of the
Delta
Modeling framework developed to support planning efforts to meet goals for sustainable resource management
Ensure availability of abundant clean water supply for municipal and agricultural uses
Restoration and maintenance of ecological resources
BUILDING STRONG®
EFDC Overview
EFDC Model
HydrodynamicsSediment
Transport
Water
QualityToxics
•1,2,3D Capable
• Internal wind waves
•Linked to many
wave models
•Vegetation
•Eutrophication
•21 state variables
•Sediment Diagenesis
•User specified
number of sediment
classes
•Cohesive(s)
•Non-cohesives
•Bedload
•Metals
•Persistent organic
pollutants
•1-2-3 Phase
adsorption
BUILDING STRONG®
EFDC Water Quality Model
21 state variables including:
TSS (cohesives)
Algae biomass
Organic Matter (C,N,P) ► Dissolved
► Particulate Labile & Refractory
Dissolved Oxygen
Nutrients ► Ammonia, Nitrate/Nitrite
► Orthophosphate
► Silica
BUILDING STRONG®
EFDC Sediment Diagenesis
Model 27 state variables
Sediment bed organic matter (C,N,P)
► G1 (fast),G2 (slow) & G3 (inert) reactive classes
Porewater (ammonia, nitrate, orthophosphate, silica, sulfide)
Sediment fluxes (dissolved oxygen, ammonia, nitrate, orthophosphate, silica, COD)
Bed temperature
BUILDING STRONG®
16,510 horizontal cells
Four vertical layers
Calibrated to 2003
Validated to 2004
Model Domain
and
Computational
Grid
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Boundary Conditions
Open water tidal boundary at Carquinez Strait
6 river inflows; 16 wastewater dischargers
4 agricultural dischargers; 6 pump stations; JT
Levee failure
4 W-R flow barriers/control structures
Time series of flow, temperature, salinity,TSS,
organic carbon, inorganic & organic N,P, algae
biomass & dissolved oxygen (obs/estimated)
BUILDING STRONG®
Inflows:
Carquinez Strait
Sacramento River
Yolo Bypass
American River
Mokelumne River
Calaveras River
San Joaquin River
Pumping Stations:
North Bay Aqueduct
CCWD Rock Slough
CCWD Old River
Harvey
Tracy
BUILDING STRONG®
Wastewater Discharges:
Sacramento CSO outfall 006
Sacramento CSO outfall 002
Sacramento Regional WWTP
City of Rio Vista WWTP
Rio Vista Northwest WWTP
City of Lodi WWTP
CCCSD
GWF Power System
City of Brentwood WWTP
City of Stockton WWTP
Town of Discovery Bay
City of Tracy WWTP
Mountain House WWTP
City of Manteca WWTP
Oakwood Lake District
Deuel Vocational Institute
BUILDING STRONG®
Discharger Treatment LevelSacramento CSO outfall 006 CSO
Sacramento CSO outfall 002 CSO
Sacramento Regional WWTP SEC
City of Rio Vista WWTP AST
Rio Vista Northwest WWTP AST
City of Lodi WWTP AWT
CCCSD
GWF Power System Cooling Water
City of Brentwood WWTP AWT
City of Stockton WWTP AWT
Town of Discovery Bay AST
City of Tracy WWTP SEC
Mountain House WWTP AWT
City of Manteca WWTP AST
Oakwood Lake District Stormwater
Deuel Vocational Institute AWT
SEC
BUILDING STRONG®
Agricultural Discharges
Numerous discharge locations in Delta
Flow and WQ data collection initiated in 2004
Data very limited for paired flow & WQ data
Data from 2004-2010 was pooled to derive daily mean flow & WQ for 2003/2004
4 agricultural dischargers included in model assigned same pooled daily flow & WQ data
BUILDING STRONG®
Sediment Bed
TOC & TON
(Pilon, 2006)
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Sediment
Diagenesis
Zones
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Initial Conditions
Water column and sediment bed
Uniform conditions not appropriate because of large domain and spatial variability
Preliminary calibration run used to extract and assign spatial distribution of initial conditions based on water quality and sediment flux model results simulated at end of 1-yr spin up run for 2003
BUILDING STRONG®
Calibration &Validation
(2003-2004) Calibration: Jan-Dec 2003
Validation: Jan-Dec 2004
Model results presented for TSS, Ammonia and Dissolved Oxygen at selected stations
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Water
Quality
Calibration
Stations
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RMS=12.6 mg/L; Relative RMS Error=14%
TSS (Surface)
Mallard Island
T
ota
l S
usp
en
ded
So
lid
s (
mg
/l)
0.0
25.0
50.0
75.0
100.0
125.0
150.0
175.0
200.0
Jan-04 Feb-04 Mar-04 Apr-04 May-04 Jun-04 Jul-04 Aug-04 Sep-04 Oct-04 Nov-04 Dec-04
Date
Calibration Results: Time Series Summary
Legend
MAL-Model (Layer 4)MAL-Data
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Ammonium (Surface)
C-3A - SR RMS=0.07 mg/L
Relative RMS Error=11%
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Ammonium Profile along
Sacramento River
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Dissolved Oxygen
(Surface)
D10-Chipps Island
Dis
solv
ed O
xyg
en (
mg
/l)
0.00
2.50
5.00
7.50
10.00
12.50
15.00
Jan-03 Mar-03 May-03 Jul-03 Sep-03 Nov-03
Time (days)
Legend
D10-Model (Layer 4)
D10-Data
RMS=0.84 mg/L; Relative RMS Error=52%
BUILDING STRONG®
Dissolved Oxygen
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Findings
Calibration and validation results are similar
TSS and most WQ variables show reasonable agreement with observed data
Additional data to characterize agriculture loads and sediment bed/flux rates are needed
Model reasonably depicts key large scale water quality processes occurring in the Delta
BUILDING STRONG®
Summary
3D EFDC model framework has now been linked to
an ecological model to describe interaction of flow, transport, salinity and water quality on key ecological resources
Model framework provides US Army Corps of Engineers and other State/Federal/local agencies and Stakeholders with a modeling tool that can be applied for resource planning evaluations
US Army Corps of Engineers
BUILDING STRONG®
Discussion
Contact Information:
Dynamic Solutions
Andrew Stoddard
(540) 338-3642
USACE – Sacramento District
Gene Maak
(916) 557-7020