Bay-Delta Science Conference October 28,...
Transcript of Bay-Delta Science Conference October 28,...
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Erwin Van Nieuwenhuyse1, Randy Dahlgren2, Chris Foe3, Jon Burau4, Scott Morford2, Harry Horner1, and Nick Sakata1
Bay-Delta Science Conference Sacramento Convention Center, Sacramento, CA October 28, 2014
Cooperative Agreement R12AC20032
1 Bureau of Reclamation 2 University of California, Davis 3 Central Valley Regional Water Quality Control Board 4 U.S. Geological Survey
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Objectives
• Limnological overview • Specific conductance, turbidity, temperature • Nutrients (nitrate, ammonium, N:P) • Phytoplankton • Zooplankton • Future work
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Map: Delta Atlas, California Department of Water Resources
Cache Slough Complex
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Rio Vista
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Isolated
Mixing zone
Tidal exchange
Sac R
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M A M J J A S O D J
Specific Conductance
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
F M A M J AS
0
200
400
600
800
1000
1200
EC S/cm
2012 2013
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*
*
µ
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*
* *
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M M J J A S O D J
Turbidity
log (ntu)
A
0.0
0.5
1.0
1.5
2.0
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
MF A M J A S
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*
*
*
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Water temperature (0.5 m)
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*
* *
*
(ft)
July 12, 2012
22 23 24 25 26 27 28
-11
-9
-7
-5
-3
-1
NL 62
NL 66
NL 70
NL 74
Dep
th (
m)
Water temperature (C)
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*
* *
* August 2, 2013
July 30, 2014
21 22 23 24 25
-11
-9
-7
-5
-3
-1
NL 62
NL 66
NL 70
NL 74
Dep
th (
m)
Water temperature (C)
22 23 24 25
-11
-9
-7
-5
-3
-1
NL 62
NL 66
NL 70
NL 74
Dep
th (
m)
Water temperature (C)
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*
*
*
*
A M J J A S O D J
DIN : SRP Mass Ratio
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
F M A M J A SM
N:PRatio
0
1
2
3
4
5
6
7
8
9
*
-
*
*
* *
M
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
A M J J A S O D J
Nitrate Concentrations
NO3-N
(mg/L)
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
F M A M J A S
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-
*
*
* *
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A M J J A S O D J
Ammonium Concentrations
NH4-N
(mg/L)
0.00
0.05
0.10
0.15
0.20
0.25
0.30
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
M F M A M J A S
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-
*
*
*
*
M
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
A M J J A S O D J
log Chorophyll
Pigments (ppb)
Chlorophyll Pigments
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
F M A M J A
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Ph
yto
pla
nk
ton
bio
vo
lum
e (
µm
3 /L
)
Anabaena, Microcystis
Rhodomonas, Chroomonas, Cryptomonas
Chlamydomonas, Coelastrum, Oocystis
Melosira, Stephanodiscus, Cyclotella, Synedra, Cocconeis, Gyrosigma, Nitzschia, Stauroneis, Synedra, Epithemia, Eunotia, Pinnularia, Planothidium
Common phytoplankton genera
July 12, 2012
Low Microcystis
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A M J J A S O D
Zooplankton Biomass
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Log Zoop
Biomass
(ug/L)
J F M A M J A S
150 micron net
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Zo
op
lan
kto
n d
ry w
t (µ
g/L
)
Ceriodaphnia, Daphnia, Diaphanasoma
Sinocalanus, Pseudodiaptomus, calanoid
Conochiloides, Lecane, Polyarthra, Brachionus
Veligers
Common macro-zooplankton genera
July 12, 2012
150 micron net
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Smelt Cam
M A M J J A S O D J
Specific Conductance
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
F M A M J AS
0
200
400
600
800
1000
1200
EC S/cm
M M J J A S O D J
Turbidity
log (ntu)
A
0.0
0.5
1.0
1.5
2.0
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
MF A M J A S A M J J A S O D
Zooplankton Biomass
NL84WSP
NL62
NL66
NL70
NL74NL76
NL56
NL44
NL34
NL16
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Log Zoop
Biomass
(ug/L)
J F M A M J A S
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Q1~350 m3/s
Chl1~3 mg/m3
Q2~42 m3/s
Chl2~30 mg/m3
Chl3~6 mg/m3
C3 = (Q1C1 + Q2C2)/(Q1+Q2)
Up
per
Sac
ram
ento
R
Cac
he
Slo
ug
h
Rio Vista
Food export experiments
Port
ADCP/YSI
ADCP/YSI
ADCP/YSI
ADCP/YSI
Rio Vista
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Conclusions
• Limnologically interesting • Longitudinal/seasonal variation • Nitrogen-deficient • Chl ~10 ug/L threshold • High zooplankton abundance • High value for delta smelt studies • Tool for boosting Delta food supply
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Questions?
Photos by Mark Gowdy