team meeting #5, great lakes protection fund grant a phosphorus soil test metric
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Team Meeting #5, Great Lakes Protection Fund Grant A Phosphorus Soil Test Metric To Reduce Dissolved Phosphorus Loading to Lake Erie Heidelberg University July 23 and 24, 2013. Observations from the rivers: Implications of bioavailability, particulate P delivery, and seasonality. - PowerPoint PPT PresentationTRANSCRIPT
Team Meeting #5, Great Lakes Protection Fund GrantA Phosphorus Soil Test Metric
To Reduce Dissolved Phosphorus Loading to Lake ErieHeidelberg University
July 23 and 24, 2013
Observations from the rivers:Implications of bioavailability, particulate P
delivery, and seasonality
David BakerProject Director
1. Bioavailable Phosphorus Export at Lake Erie Loading Stations
2. Particulate Phosphorus Delivery: Loading Station to Lake
3. Observations of direct P fertilizer runoff
4. Seasonal aspects of precipitation, discharge and loading
Topics
The Study Area: From Waterville to the Western Basin
Study Topics1. Trends in bioavailable P
export at the Maumee Loading station.
2. Transport of Bioavailable P from Waterville to the Western Basin during storm events.
Waterville tributary loading station for the Maumee River
Total Phosphorus =
Total ParticulatePhosphorus
+Total
Dissolved Phosphorus
Total Bioavailable Phosphorus
=Bioavailable ParticulatePhosphorus
+Bioavailable Dissolved
Phosphorus
DissolvedReactive
Phosphorus
Routine analyses at Heidelberg
Bioavailable P studies at Heidelberg
Major forms of phosphorus in river samples
Focus on Storm Runoff Samples
Dissolved Phosphorus Annual Loads Total Dissolved P
TDPY = DRPY x (TDPFWMC/DRPFWMC)Y
(TDPFWMC/DRPFWMC)Y
1982 = 1.31 2010 = 1.10
Bioavailable Dissolved P (DHP)
BDPY = TDPY x (DHPFWMC/TDPFWMC)Y
(DHPFWMC/TDPFWMC)Y
1982 = 0.91 2010 = 0.97
Particulate Phosphorus Annual Loads Total Particulate P
TPPY = TPY - TDPY
Bioavailable Particulate P
BPPY = TPPY x 0.27
Maumee River Annual Loads
Total Phosphorus (TP)
TP is directly measured
Total Bioavailable Phosphorus (TBP)
TBPY = BPPY + BDPY
Maumee River at Waterville, Average Annual Loads, 2023-2012
Total Phosphorus
2,437 metric tons per year
Bioavailable Phosphorus
1,098 metric tons per year
45 % of Maumee TP is bioavailable
Maumee River at Waterville, Average Annual Loads, 2023-2012
Total Phosphorus
2,437 metric tons per year
33 % of Maumee TP is bioavailable at
lake
Bioavailable P Delivered to Lake
Assumes 33% Delivery of PP
772 metric tons per year
Total Phosphorus• Annual Load = 608 metric tons• 1.88 kg/ha (1.67 lbs/acre)• 70 % total particulate P (1.17 lbs/acre)• 30 % total dissolved P (0.50 lbs/acre)
Total Bioavailable Phosphorus• Annual Load = 296 metric tons• 0.91 kg/ha (0.82 lbs/acre)• 43% bioavailable particulate P (0.32
lbs/acre)• 57% bioavailable dissolved P (0.47
lbs/acre)
TMDLsNutrient TradingTarget Loads
Average Annual Loads 2003-2012, Sandusky River at Fremont
3. Observations of direct P fertilizer runoff
2/15 2/20 2/25 3/2 3/7 3/120.00
0.20
0.40
0.60
0.80
1.00
-10.0
0.0
10.0
20.0
30.0
40.0
50.0
Lost Creek Snow Melt Runoff Events
Date, 2010
DRP,
mg/
L
Dis
char
ge, c
fs
Winter Broadcasting of fertilizer in
the Lost Creek Watershed,
2010
.
Dates custom applicators were in fields
Some Fall Runoff Events from Honey Creek
4. Seasonal aspects of precipitation, discharge and loading
10/1 10/31 11/30 12/31 1/30 3/2 4/1 5/1 6/1 7/1 8/1 8/310
5
10
15
20
25
30
35
40
0
100
200
300
400
500
600
SRP loading Rate, 2011 WY SRP cumulative load
Date, 2011 water year, Maumee River at Waterville
DRP
load
ing
rate
, met
ric to
ns/d
ay
DRP
cum
ulati
ve lo
ad, m
etric
tonsMarch 1-June 30 load
2010
2011
Month (1975-2012)
1 2 3 4 5 6 7 8 9 10 11 12
Run
off o
r pre
cipi
tatio
n (c
m)
0
5
10
15
20
RunoffPrecipitation
Sandusky River Data
Month (1975-2012)
1 2 3 4 5 6 7 8 9 10 11 12
Mea
n m
onth
ly p
reci
pita
tion
(cm
)
0
5
10
15
20
25
30
Month (1975-2012)
1 2 3 4 5 6 7 8 9 10 11 12
Mea
n m
onth
ly ru
noff
(cm
)
0
5
10
15
20
25
30
Month (1975-2012)
1 2 3 4 5 6 7 8 9 10 11 12
DR
P m
onth
ly lo
ad (m
etric
tons
)
0
20
40
60
80
100
Month (1976-2012)
1 2 3 4 5 6 7 8 9 10 11 12
DR
P m
onth
ly F
WM
C (m
g P
/L)
0.0
0.1
0.2
0.3
0.4
Months (1976-2012)
1 2 3 4 5 6 7 8 9 10 11 12
Coe
ffici
ent o
f Var
iatio
n
0.0
0.5
1.0
1.5
2.0
2.5
DRP LoadDRP FWMCRunoff
Total Phosphorus08/28/2007 – Bridgeman (6 stations)08/29/2007 – Landsat Image 08/30/2007 – Vincent Transect
0.0830.100
0.0620.113
0.0660.139
0.1000.206
0.1050.181
0.0530.107
DRPTP
08/28/2007 – Bridgeman (6 stations)08/29/2007 – Landsat Image 08/30/2007 – Vincent Transect
Dissolved Reactive P.