transport processes: time scale correlation between flow and scalar concentration chris enright...
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Transport processes:Time scale correlation between flow and scalar concentration
Chris Enright
CWEMF DSM2 Workshop
February 6, 2007
Or, how Geometry “filters” estuarine drivers (tides, river input)
Chris Enright
CWEMF DSM2 Workshop
February 6, 2007
Transport processes
• For modeling purposes, validate that DSM2 transports salt etc. for the right reason…
• Reasons: Advection and dispersion
Advective Transport
• Correlation between net flow and net scalar concentration
• Mostly from river input and spring-neap estuary fill-drain cycle
• Advective Flux = <Qt><Ct>
Dispersive Transport
• Correlation between tidal flow and tidal scalar concentration
• Driven by tide
• Dispersive Flux = <Q’t*C’t>
Total Flux
• Superposition of advective and dispersive flux.
• Total Flux = advection + disperion
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
• Compute with model output and field data and compare.
Suisun Marsh and BaySuisun Marsh and Bay
First Mallard First Mallard BranchBranch
Sheldrake Sheldrake SloughSlough
First Mallard BranchFirst Mallard BranchSheldrake SloughSheldrake Slough
Suisun Slough
Suisun Slough
Comparing Comparing
Sheldrake Sl. and First Mallard BranchSheldrake Sl. and First Mallard Branch
• Similar tidal prismSimilar tidal prism• Similar source waterSimilar source water• Different adjacent land useDifferent adjacent land use
First Mallard BranchFirst Mallard Branch
No LeveesNo Levees
Marsh plain Marsh plain elevation iselevation is~ MHHW~ MHHW
Suisun Slough
Suisun Slough
First Mallard BranchFirst Mallard Branch
No LeveesNo LeveesEdge of Marsh Plain is Edge of Marsh Plain is ~ 6.7 feet NAVD88~ 6.7 feet NAVD88
Marsh plain Marsh plain elevation iselevation is~ MHHW~ MHHW
Suisun Slough
Suisun Slough
First Mallard BranchFirst Mallard Branch
ADCPADCP
SondeSonde
No LeveesNo Levees
Marsh plain Marsh plain elevation iselevation is~ MHHW~ MHHW
Edge of Marsh Plain is Edge of Marsh Plain is ~ 6.7 feet NAVD88~ 6.7 feet NAVD88
Suisun Slough
Suisun Slough
Sheldrake SloughSheldrake Slough
Diversion/Drain CulvertsDiversion/Drain Culverts
Completely dikedCompletely diked
Suisun SloughSuisun Slough
Sheldrake SloughSheldrake Slough
Diversion/Drain CulvertsDiversion/Drain Culverts
Completely dikedCompletely diked
Moderately subsidedModerately subsidedmarsh plain dependingmarsh plain dependingon land use practiceon land use practice
Suisun SloughSuisun Slough
Sheldrake SloughSheldrake Slough
ADCPADCP
SondeSonde
Completely dikedCompletely diked
Diversion/Drain CulvertsDiversion/Drain Culverts
Moderately subsidedModerately subsidedmarsh plain dependingmarsh plain dependingon land use practiceon land use practice
Suisun SloughSuisun Slough
MHHW
MSL
MLLW
Borrow Ditch
ManagedPond
~ Sheldrake ~ Sheldrake SloughSlough
Comparing Typical Cross-section Hypsography
Mean Sea LevelMean Sea Level
Levee
MHHW
MSL
MLLW
MHHW
MSL
MLLW
Borrow Ditch
ManagedPond
Marsh plain
~ Sheldrake ~ Sheldrake SloughSlough
~ First Mallard~ First MallardBranchBranch
Comparing Typical Cross-section Hypsography
Mean Sea LevelMean Sea Level
Levee
MHHW
MSL
MLLW
MHHW
MSL
MLLW
ManagedPond
Marsh plain
~ Sheldrake Sheldrake SloughSlough
~ First Mallard~ First MallardBranchBranch
Comparing Typical Cross-section Hypsography
Spring High TideSpring High Tide
Levee Borrow Ditch
First Mallard BranchFirst Mallard BranchSheldrake SloughSheldrake Slough
Suisun Slough
Suisun Slough
Data is flow, temperature, chlorophyll,Data is flow, temperature, chlorophyll,salt and DO flux at these locations:salt and DO flux at these locations:
-1000
-800
-600
-400
-200
0
200
400
600 First Mallard Branch
-1000
-800
-600
-400
-200
0
200
400
600 Sheldrake Slough
15 22 29 6 13 20 27 3 10 17 24 1 8 15 22 29 5
Suisun Marsh Planning (DRAFT) Mon Oct 23 12:15:12 PDT 2006
FLO
W (
cfs)
FLO
W (
cfs)
April 2004 | May | June | July | August
Tidal FlowTidal Flow
Tidal Flow0
0
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
-1000
-800
-600
-400
-200
0
200
400
600 First Mallard Branch
-1000
-800
-600
-400
-200
0
200
400
600 Sheldrake Slough
15 22 29 6 13 20 27 3 10 17 24 1 8 15 22 29 5
Suisun Marsh Planning (DRAFT) Mon Oct 23 12:19:43 PDT 2006
FLO
W (
cfs)
FLO
W (
cfs)
Tidal and Net FlowTidal and Net Flow
Tidal FlowResidual “Net” Flow 0
0
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
April 2004 | May | June | July | August
Flu
x (k
g/s
)F
lux
(kg
/s)
Salt FluxSalt Flux Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
April 2004 | May | June | July | August
Flu
x (g
/s)
Flu
x (g
/s)
DO FluxDO FluxEBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
April 2004 | May | June | July | August
Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
-40
-30
-20
-10
0
10
First Mallard Branch
15 22 29 6 13 20 27 3 10 17 24 1 8 15 22 29 5
-40
-30
-20
-10
0
10
Sheldrake Slough
Temperature FluxTemperature Flux
April 2004 | May | June | July | August
Tem
pera
ture
Flu
x (C
*m /
s)T
empe
ratu
re F
lux
(C*m
/s)
33
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
Total = Advective + Dispersive Flux Flux Flux (Spring Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
Spring TideSpring TideAdvectiveAdvective FluxFlux
Flu
x (g
/s)
Flu
x (g
/s)
Chlorophyll FluxChlorophyll Flux
April 2004 | May | June | July | August
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
Neap TideNeap TideAdvectiveAdvective FluxFlux
Flu
x (g
/s)
Flu
x (g
/s)
Chlorophyll FluxChlorophyll Flux
April 2004 | May | June | July | August
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
Spring TideSpring TideDispersive FluxDispersive Flux
Flu
x (g
/s)
Flu
x (g
/s)
Chlorophyll FluxChlorophyll Flux
April 2004 | May | June | July | August
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
Neap TideNeap TideDispersive FluxDispersive Flux
Flu
x (g
/s)
Flu
x (g
/s)
Chlorophyll FluxChlorophyll Flux
April 2004 | May | June | July | August
EBB (out)
EBB (out)
FLOOD (in)
FLOOD (in)
Total = Advective + Dispersive Flux Flux Flux (Spring-Neap) (Tides)
<Qt*Ct> = <Qt><Ct> + <Q’t*C’t>
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)
Conceptual Model
Linkages (hydrodynamic
processes)
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Conceptual Model
Linkages (hydrodynamic
processes)
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Conceptual Model
Linkages (hydrodynamic
processes)
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Conceptual Model
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)
GeometryGeometry(Like a(Like a Filter)Filter)
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Conceptual Model
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
Drivers(forcing mechanisms)
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Outcomes(Chemical/BiologicalHabitat Characteristics)
GeometryGeometry(Like a(Like a Filter)Filter)
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
Conceptual Model
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
Drivers(forcing mechanisms)
Outcomes(Chemical/BiologicalHabitat Characteristics)
GeometryGeometry(Like a(Like a Filter)Filter)
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
First Mallard BranchFirst Mallard Branch
Conceptual Model
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
Outcomes(Chemical/BiologicalHabitat Characteristics)
GeometryGeometry(Like a(Like a Filter)Filter)
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
First Mallard BranchFirst Mallard Branch
Conceptual Model
Drivers(forcing mechanisms)
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation
Outcomes(Chemical/BiologicalHabitat Characteristics)
GeometryGeometry(Like a(Like a Filter)Filter)
• Meteorology
• Tides
• River inputs
• Exports/ Diversions/ Drainages
Gradients of• Residence time• Salinity• Temperature• Sediment• Biota• Toxics• etc.
Sheldrake SloughSheldrake Slough
Drivers(forcing mechanisms)
Conceptual Model
Linkages (hydrodynamic
processes)
• Advection
• Dispersion - network - velocity shear - tidal trapping
• Gravitational Circulation