Sedimentation Pond and Plant Filter Strip in Mitigating ... · 1 Sedimentation Pond and Plant...
Transcript of Sedimentation Pond and Plant Filter Strip in Mitigating ... · 1 Sedimentation Pond and Plant...
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Sedimentation Pond and Plant Filter Strip in Mitigating RIFA Insecticide Runoff at el modeno
Gardens
Dave Kim, Johanna Walters, Kean S. GohDepartment of Pesticide RegulationJohn Kabashima, Darren Haver
UC Cooperative ExtensionToby Mancini
el modeno GardensAugust 15, 2001
Outline
• Introduction • Runoff Monitoring • Runoff Mitigation • Conclusions
The Insecticides
• Bifenthrin (Talstar®)• Fenoxycarb (Award®)• Hydramethylnon (Amdro®)• Pyriproxyfen (Distance®)• Chlorpyrifos (Dursban®)• Diazinon • Malathion • Dimethoate
Insecticide Factors
• Vapor Pressure (mm Hg)• Water Solubility (ppm, mg/L)• Soil Adsorption Coefficient (Koc)• Field Dissipation (t1/2, days)
Water Solubility (ppm)
0
10
20
30
40
50
60
Talst
ar
Durs
ban
Diaz
inon
Awar
d
Amdr
o
Dista
nce
2
Soil Adsorption Coefficient
0
50
100
150
200
250
Talstar Dursban Diazinon Award Amdro Distance
Field Dissipation Half-Life (Days)
0
20
40
60
80
100
120
140
160
Talstar Dursban Diazinon Award Amdro Distance
Aquatic Toxicity
00.20.40.60.8
11.21.41.61.8
Aba
mec
tin
Bife
nthr
in
Chl
orpy
rifo
s
Dia
zino
n
Feno
xyca
rb
Hyd
ram
ethy
lnon
Pyri
prox
yfen
R. Trout D. magna
Offsite Movements
• Spray drift– primary, secondary
• Runoff–dissolved in water –adsorbed to soil particles and organic
materials
Runoff Monitoring
3
El Modeno Outflow
0
1
2
3
4
5
6
7
8
9
Jun
-99
Sep
-99
Oct
-99
Dec
-99
Jan
-00
Feb
-00
Mar
-00
Ap
r-0
0
May
-00
Jun
-00
Jul-
00
Au
g-0
0
Sep
-00
Sep
-00
Oct
-00
Oct
-00
No
v-0
0
No
v-0
0
Dec
-00
Dec
-00
Jan
-01
Jan
-01
Feb
-01
Mar
-01
Mar
-01
May
-01
May
-01
Jun
-01
Con
cent
rati
on (
ppb)
bifenthrinchlorpyrifosdiazinondimethoatemalathionmethidathionm. parathionfonofos
el modeno Gardens
0123456789
10
Jun-99 Sep-99 Oct-99 Dec-99 Jan-00 Feb-00 Mar-00 Apr-00 May-00 Jun-00
Month
Con
cent
rati
on (
ppb)
0102030405060708090100
Mor
talit
y of
C. d
ubia
(%
)
diazinonchlorpyrifosfenoxycarbbifenthrin% mortality
San Diego Creek
0
.5
1M
ar-9
9A
pr-9
9
Ma
y-9
9Ju
n-9
9
Sep-
99
Oct
-99
Dec
-99
Jan-
00
Feb
-00
Mar
-00
Apr
-00
Ma
y-0
0Ju
n-0
0
Jul-
00
Aug
-00
Sep-
00
Oct
-00
Nov
-00
Dec
-00
Jan-
01
Feb
-01
Mar
-01
Month
chlorpyrifosdiazinondimethoatefonofosmalathionbifenthrin
San Diego Creek
0
1
2
Mar
-99
Apr-
99
May
-99
Jun
-99
Sep
-99
Oct
-99
Dec
-99
Jan
-00
Feb
-00
Mar
-00
Apr-
00
May
-00
Jun
-00
Jul-
00
Au
g-0
0S
ep-0
0O
ct-0
0N
ov-0
0D
ec-0
0Ja
n-0
1F
eb-0
1M
ar-0
1
Co
nce
ntr
ati
on
(p
pb
)
0102030405060708090100
Mo
rta
lity
of
C. d
ub
ia (
%)
malathionfonofosdimethoatediazinonchlorpyrifos% mortality
Mitigation
4
Prevention & MitigationInsecticide & Application Irrigation ManagementWater RecoveryHolding Pond Buffer Strip
Bifenthrin Concentrations in Filter Strip
0
0.5
1
1.5
2
2.5
3
3.5
Jun
-00
Jul-
00
Aug
-00
Sep-
00
Sep-
00
Oct
-00
Oct
-00
Nov
-00
Nov
-00
Dec
-00
Dec
-00
Jan-
01
Jan-
01
Mar
-01
Mar
-01
May
-01
May
-01
Jun
-01
Co
ncen
tra
tio
n (p
pb
)
inflowoutflo
5
Chlorpyrifos Concentrations in Filter Strip
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Jun
- 00
Jul -
00
Aug
-00
Sep
-00
Sep
-00
Oct
-00
Oct
- 00
Nov
- 00
Nov
- 00
Dec
-00
Dec
-00
Jan-
01
Jan-
01
Mar
-01
Mar
-01
May
- 01
May
- 01
Jun
- 01
Co
nce
ntr
ati
on
(p
pb
)
inflowoutflow
Diazinon Concentrations in Filter Strip
0
0.05
0.1
0.15
0.2
0.25
Jun
-00
Jul-
00
Aug
-00
Sep
-00
Sep
-00
Oct
-00
Oct
-00
Nov
-00
Nov
-00
Dec
-00
Dec
-00
Jan-
01
Jan-
01
Mar
-01
Mar
-01
May
-01
May
-01
Jun
-01
Co
nce
ntr
ati
on
(p
pb
)
inflowoutflow
Malathion Concentrations in Filter Strip
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Jun
-00
Jul -
0 0
Au g
-00
Sep
-00
Sep
-00
Oct
-00
Oct
-00
Nov
-00
Nov
-00
Dec
-00
Dec
-00
Jan-
01
Jan-
01
Mar
-01
Ma r
-01
Ma y
-01
May
-01
Jun
-01
Co
nce
ntr
ati
on
s (p
pb
)
inflowoutflow
Sep-00Basin #1
Oct-00Basin #1
Sep-00Basin #2
Oct-00Basin #2
Sep-00Basin #3
Oct-00Basin #3
diazinonchlorpyrifos
bifenthrin0
50
100
150
200
250
300
Con
cent
ratio
n (p
pb)
sample location
Filter Strip Sediment Samples 2000
Feb-01Basin #2
Mar-01Basin #2
Feb-01Basin #7
Mar-01Basin #7
diazinon
bifenthrin0
400
800
1200
1600
Concentration (ppb)
Sample location
Filter Strip Sediment Samples 2001
Polyacrylamide (PAM)
6
50.80
%49
.90%
57.06
%17
.99%
64.1
6%21
.05%
0
0.2
0.4
0.6
0.8
1
1.2
1.4
% reduction
Bifenthrin OutBifenthrin In
PAM
0 1 2 3 4 5
Dia
zin
on
Ou
tD
iazi
no
n In
Bife
nth
rin
Ou
tB
ifen
thri
n In
00.20.40.60.8
11.21.4
Diazinon OutDiazinon InBifenthrin OutBifenthrin In
Conclusions
Runoff
• Bifenthrin, diazinon, malathion• Bifenthrin high>3 ppb, currently <1 ppb• Diazinon high>8 ppb, currently trace• Peaks at rain runoff• Toxic to C. dubia
Mitigation Reduction in Water Concentration• Bifenthrin 52%• Chlorpyrifos 61%• Diazinon –13%• Malathion 31%
Sediments
• Bifenthrin– Increased through time
• 200 – 1400 ppb– Increased downstream basin
• 150 –250 ppb • 800 – 1200 ppb
• Chlorpyrifos <80 ppb• Diazinon none detected
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Acknowledgments
California Dept of Food and Agriculture Center for Analytical Chemistry
UC Cooperative Extensionel modeno Gardens
Department of Fish and GameOrange County Dept of Agriculture
Regional Water Quality Control Board
www.cdpr.ca.gov/docs/rifa