lake water quality management in alberta trew_lake water qualit… · cottages (sewage) 1272 kg net...
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Lake Water Quality ManagementLake Water Quality Management
in Alberta in AlbertaPresented at the Lake Management WorkshopPresented at the Lake Management Workshop
June 19, 2013 June 19, 2013 David Trew, P. Biol.David Trew, P. Biol.
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North Saskatchewan Watershed North Saskatchewan Watershed Alliance (NSWA)Alliance (NSWA)
A multi-stakeholder, non-profit A multi-stakeholder, non-profit society (inc. 2000)society (inc. 2000)
Appointed Appointed WPACWPAC by GOA in by GOA in 20052005
Members: organizations and Members: organizations and individualsindividuals
~5 FTE staff ~5 FTE staff 2011-12 Budget: $460K cash 2011-12 Budget: $460K cash
and $375K in-kind supportand $375K in-kind support Offices and IT provided by City Offices and IT provided by City
of Edmontonof Edmonton Facebook, Twitter, WebsiteFacebook, Twitter, Website
•
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Watershed Planning and Advisory CouncilsWatershed Planning and Advisory Councils
ElevenEleven WPACsWPACs have been have been appointed by GOAappointed by GOA
WPACs collaborate regularlyWPACs collaborate regularly WPAC role under WPAC role under Water for LifeWater for Life: :
State of Watershed ReportsState of Watershed ReportsWatershed Management PlansWatershed Management Plans Contribute knowledge, support Contribute knowledge, support
watershed management work watershed management work by municipalities and local by municipalities and local watershed stewardship groupswatershed stewardship groups
Milk River Watershed Council
Lesser Slave Lake Watershed Council
Beaver River Watershed Alliance
North Saskatchewan Watershed Alliance
Battle River Watershed Alliance
Red Deer Watershed Alliance
Bow River Basin Council
Oldman Watershed Council
Mighty Peace Watershed Alliance
Athabasca Watershed
Council
SEAWA
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NSWA Publications NSWA Publications North Saskatchewan North Saskatchewan
River Guide (2002)River Guide (2002) Community Watershed Community Watershed
Stewardship Toolkit Stewardship Toolkit (2002)(2002)
Canadian Heritage Canadian Heritage Rivers Program (2005)Rivers Program (2005)
State of the Watershed State of the Watershed Report (2005)Report (2005)
Municipal Resource Municipal Resource Guide (2006)Guide (2006)
15 technical reports 15 technical reports (2007-10)(2007-10)
8 planning reports 8 planning reports (2011-12) (2011-12)
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Major features:1.2 million people20 counties2 hydro-electric reservoirs3 coal fired plantsLarge petrochemical sectorLarge agriculture sectorForestry Oil and gas exploration12 water sub-basins37 recreational lakes
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Central Alberta LakesCentral Alberta Lakes Geology, land useGeology, land use Few high quality Few high quality
lakeslakes Many are shallow Many are shallow
and naturally and naturally “green”“green”
125+ years 125+ years human impactshuman impacts
Poorly flushedPoorly flushed High retention of High retention of
phosphorus phosphorus
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PressuresPressures
Population growthPopulation growth Lakeshore Lakeshore
development development Watershed impacts Watershed impacts
(agriculture, forestry, (agriculture, forestry, oil/gas development, oil/gas development, residential) residential)
Climate change Climate change effectseffects
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Value of our LakesValue of our Lakes
Key recreational Key recreational destinationsdestinations
Provincial ParksProvincial Parks Real estate Real estate
investmentinvestment Fishing, boating, Fishing, boating,
recreationrecreation Value of lakes in Value of lakes in
the recreational the recreational economy? economy?
EGS?EGS?
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International Lake ScienceInternational Lake Science
>100 years of World and Canadian >100 years of World and Canadian scientific research on lakesscientific research on lakes
Vollenweider (1968):Vollenweider (1968): “Scientific “Scientific fundamentals of the eutrophication of fundamentals of the eutrophication of lakes and flowing waters”. OECD, Parislakes and flowing waters”. OECD, Paris
Key role of phosphorus management in Key role of phosphorus management in the protection of lake water qualitythe protection of lake water quality
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The Vollenweider phosphorus The Vollenweider phosphorus model (1969)model (1969)
[TP] = TP Concentration [TP] = TP Concentration
L = Annual P-LoadingL = Annual P-Loading z = Mean depthz = Mean depth ρρww = Flushing rate = Flushing rate
σσ = Sed. Coeff = Sed. Coeff
[TP] = L
z (σ + ρω)
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The 1970s The 1970s phosphorus phosphorus
modeling modeling procedure procedure
DEPTH
FLUSHING RATE
P-RETENTION
SALINITY
TURBIDITY
N:P RATIOS
P- LOADINGS
P- CONCENTRATIONS
ALGAL CONCENTRATIONS
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Example:Example:Phosphorus control Phosphorus control
in the NSRin the NSR
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Reservoir Operations
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Brazeau Hydro Plant - 1965Brazeau Hydro Plant - 1965
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Bighorn Hydro Plant - 1972Bighorn Hydro Plant - 1972
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Impact of Reservoirs on DischargeImpact of Reservoirs on Discharge
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1.15 mg/L 0.761 mg/L0.552 mg/L0.405 mg/L
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Central Alberta LakesCentral Alberta Lakes
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““Catch anything today?Catch anything today?” ”
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““See you at the beach?”See you at the beach?”
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AgriculturalLand = ?
Forested Land = ?
Rain/Dust/Snow = ?
Internal Load = ?
Shoreline Sewage = ?
Urban Runoff = ?
Phosphorus Control (?)Phosphorus Control (?)
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The Baptiste Lake Study The Baptiste Lake Study 1976-791976-79
Crisis at lake: too Crisis at lake: too much development much development already? already?
GOA needed a lake GOA needed a lake model to predict model to predict effects of developmenteffects of development
Intensive study of lake Intensive study of lake and watershed nutrient and watershed nutrient sources sources
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Baptiste Lake Study ResultsBaptiste Lake Study Results
Developed sampling Developed sampling and lab methods and lab methods
Described annual lake Described annual lake phosphorus cyclephosphorus cycle
Measured phosphorus Measured phosphorus loadings from loadings from agricultural and agricultural and forested streamsforested streams
Observed high Observed high phosphorus near phosphorus near bottom sedimentsbottom sediments
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Tributary LocationsTributary LocationsN
EW
S
ML
K
F
E
AB
C
D
H
I
J
N
La
ke
Ba
ptis
te
At h
ab
as
ca
Ri v
er
GX
O
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AgriculturalLand = 800 kg
Forest Land = 1500 kg
Rain/Dust/Snow = 279 kg
Internal Load = 1000+ kg
Shoreline Sewage(315 kg)
Urban Runoff = 500 kg
Baptiste: Phosphorus Sources Baptiste: Phosphorus Sources
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Slide showing Slide showing sediment cores?sediment cores?
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0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.11
-Ma
y-8
2
21
-Ma
y-8
2
10
-Ju
n-8
2
30
-Ju
n-8
2
20
-Ju
l-82
9-A
ug
-82
29
-Au
g-8
2
18
-Se
p-8
2
8-O
ct-8
2
28
-Oct
-82
Sample Date
Ph
osp
ho
rus F
racti
on
s (
mg
/L)
Total Phosphorus
Total DissolvedPhosphorus
Soluble ReactivePhosphorus
Comparison of Seasonal Phosphorus Concentrations in Tucker Lake, 1982
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Tucker Lake P-Budget 1982
Surface Runoff594.1 kgAtmospheric Deposition40.6 kgInternal Loading920 kg
3%
59%
38%
Surface Runoff594.1 kg
Atmospheric Deposition40.6 kg
Internal Loading920 kg
Tucker Lake P-budget, May 10-October 27, 1982
Total Load = 1554.7 kg
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Wabamun Lake P-Budget 1981
Surface Runoff (Streams) 1804 kgDiffuse Runoff 1262 kgAsh Lagoon 239 kgAtmospheric Deposition 2034 kgCottages (Sewage) 75 kgGroundwater 364 kgInternal Loading 12000 kg
2.0%0.4%
1.3%
7.1%
10.1%
11.4%
67.5%
Surface Runoff (Streams) 1804 kg
Diffuse Runoff 1262 kg
Ash Lagoon 239 kg
Atmospheric Deposition 2034 kg
Cottages (Sewage) 75 kg
Groundwater 364 kg
Internal Loading 12000 kg
Wabamun Lake P-budget, March 4, 1981 to March 3, 1982
Total Load = 17778 kg
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Pine Lake PhosphorusBudget, 1992
32.9%
3.2%
3.1%
60.8%
Streams(665 kg)
Diffuse Runoff Areas(64 kg)
AtmosphericDeposition (62 kg)
Net Internal Loading(1228 kg)
(Includes theoreticalsewage loading of118 kg)
Calculated Loadingof Phosphorusfrom Sewage
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Lac Ste. Anne and Lake IsleLac Ste. Anne and Lake Isle
Twp 55
Twp 54
Twp 53
Rge 3Rge 4Rge 5
Rge 6Rge 7
Diffuse Runoff Area
Tributary
AnneAnneAnneAnneAnneAnneAnneAnneAnne
LacLacLacLacLacLacLacLacLac
SteSteSteSteSteSteSteSteSte
LakeLakeLakeLakeLakeLakeLakeLakeLake
BirchBirchBirchBirchBirchBirchBirchBirchBirch
IsleIsleIsleIsleIsleIsleIsleIsleIsle
LakeLakeLakeLakeLakeLakeLakeLakeLake
Isle Lake - Lac Ste Anne Basin
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Lac Ste. Anne P-Budget 1997
Surface Runoff 8234 kgAtmospheric Deposition 469 kgCottages (Sewage) 700 kgNet Internal Load 14000 kg
3.0%
2.0%
35.2%
59.8%
Surface Runoff 8234 kg
Atmospheric Deposition 469 kg
Cottages (Sewage) 700 kg
Net Internal Load 14000 kg
Isle Lake P-budget, March 1 to October 31, 1997
Total Load = 23403 kg
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Lac Ste. Anne P-Budget 1997
Surface Runoff 11854 kgFrom Lake Isle 5732 kgAtmospheric Deposition 1068 kgCottages (Sewage) 1272 kgNet Internal Load 22110 kg
3.0%
28.2%
13.6%
2.5%
52.6%
Surface Runoff 11854 kg
From Lake Isle 5732 kg
Atmospheric Deposition 1068 kg
Cottages (Sewage) 1272 kg
Net Internal Load 22110 kg
Lac Ste. Anne P-budget, March 1 to October 31, 1997
Total Load = 42036 kg
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Gull Lake P-budget 2000 Gull Lake P-budget 2000
10.8%
33.3%
48.0%
4.1%3.8%
Forest
Agricultural/Cleared
Precipitation/Dustfall
Internal Load(bottom sediments)Blindman Diversion
TOTAL LOAD = 16,245 kg(Preliminary Estimates)
2000
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Range of Daily Net Internal Loading Ratesfor 28 Shallow Alberta Lakes
-5
0
5
10
15
20
25C
rimso
n
Dill
ber
ry
Buf
falo
Gu
ll
Syl
van
McL
eod
Eas
t
Pig
eon
Pin
e
Wab
amun
Wiz
ard
Iose
gun
Elk
wat
er
Mur
iel
Moo
se
Long
Moo
nshi
ne
Bon
nie
Bat
tle
Ste
ele
Sa
ndy
Sou
th
Tuc
ker
Ste
. Ann
e
Sa
ndy
Nor
th
Buc
k
Isle
Stu
rgeo
n
Sm
oke
Sas
kato
on
Lake Name
Ne
t R
ate
of
Inte
rnal
To
tal P
ho
sph
oru
s L
oad
ing
(m
g/m
2/d
)
-5
0
5
10
15
20
25
Maximum
75th Percentile
Median
25th Percentile
Minimum
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Watershed Stream StudiesWatershed Stream Studies
0
0.2
0.4
0.6
0.8
1
1.2
1.4
Hay
nes
Creek
Baptis
te (
AENV)
CAESA
Baptis
te (U
of A
)
Wab
amun
(AEN
V)
CAESA
CAESA
Baptis
te (U
of A
)
Wab
amun
(AEN
V)
Baptis
te (A
ENV)
Two
Cre
ek (U
of A
)
An
nu
al
Flo
w-W
eig
hte
d M
ea
n T
P (
mg
/L)
Agricutural Streams Forested Streams
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Phosphorus in Alberta Lakes Phosphorus in Alberta Lakes
0
50
100
150
200
250
300
Gre
gg
Jarv
is
Tra
vers
Dill
berr
y
Tou
chw
ood
New
ell
Crim
son
Syl
van
Spr
uce
Cou
lee
McL
eod
Beau
vais
Gre
goi
re
Pol
ice
Out
post
Ree
sor
Cha
in L
ake
s
Nor
th B
uck
Pig
eon
Waba
mun
Gar
ner
Elk
wat
er
Moo
se
Gul
l
Lon
g
Buf
falo
Mai
n B
ay
Thu
nder
Buf
falo
Sec
onda
ry
Stu
rgeo
n M
ain
Ste
ele
La B
iche
Win
aga
mi
Moo
nshi
ne
Miq
uel
on
Car
dina
l
LAKE NAME
TO
TA
L P
HO
SP
HO
RU
S (
mg
/m3 )
0
50
100
150
200
250
300
Oligotrophic(Low Productivity)
(<10 mg/m3)
Mesotrophic(Moderate Productivity)
(10-35 mg/m3)
Eutrophic(High Productivity)
(35-100 mg/m3)
Hypereutrophic(Very High Productivity)
(>100 mg/m3)
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Alberta Lake Studies Alberta Lake Studies
Large number of GOA reports and academic Large number of GOA reports and academic journal publications: limnology of Alberta lakes journal publications: limnology of Alberta lakes
Lakes with nutrient data: Lakes with nutrient data: 438438 Lakes with “time series” nutrient data versus Lakes with “time series” nutrient data versus
single samples: single samples: 169 169 Lakes currently monitored: Lakes currently monitored: 5757 Lakes with watershed (diagnostic) studies: Lakes with watershed (diagnostic) studies: 6+6+ Lakes with watershed–based water quality Lakes with watershed–based water quality
“plans”: 1 (Pine)“plans”: 1 (Pine)
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Summary Summary
Central Alberta rivers have improved since Central Alberta rivers have improved since 1980s - as a result of applied research and 1980s - as a result of applied research and strong pollution control regulationsstrong pollution control regulations
Lake water quality has not improved, and Lake water quality has not improved, and remains poor or threatened in many cases – remains poor or threatened in many cases – even though much applied research is even though much applied research is available available
Accountabilities for “lake management” need Accountabilities for “lake management” need to be resolvedto be resolved
Lake water quality plans must be integrated Lake water quality plans must be integrated into current land use planning.into current land use planning.
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Thank YouThank You
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