HomeMy WebLinkAbout06. (Handout) Nutrient Watershed PermitNUTRIENT
WA TER SHED PERMIT
Y Curtis W. Swanson
Director of Operations
February 11, 2014
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ciecreasing DO in and nutria
iost of the estuary stratp-m
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sI, a
CCCSD 1725
to OWCSD 4187
OChew'on 1(g /d
Ss" G a
p MW
0 MS
SMCSDO EBMUD
600
10, L a
SFSE
8307 kg /d
kg /d O CVSD O DSRSD
EBDA O
ssr 8641 oLSD
116s � ..
kg /d OHAY
S' nirpo
MILT. (�U.
BURL SM
.1501
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SB5A
2118
Ian
2.41 SJSC
SUN 5233
1086
. kg /d
9,•
N Load Secondary Ammonia
Treatment Removal
(kg /d)
High Direct N Loads to SFB Subembayments
50 -
hA
.�
0
0
O
40
W
W
30
L
U
20
10 -
Chesapeake
0
Delaware
Q
MD Coastal Bays
0
Barnegat
0
Florida Bay Pensacola Narragansett
Q CENT
SO 0 SPB
0j
0
10 20 30 40 50 60
Nitrogen Load (g N m-2 yr -1)
LS B
70 80
O National Estuarine
Experts Workgroup (2010)
SFEI (2013)
Sources of Nitrogen
DIN = nitrate + ammonium
Source and seasonality vary by
subembayment
:111
MM
I
DIN: Lower South Bay (kg d -1)
as110,
n
DIN: Suisun (kg d -1)
Delta NO3-
Delta NH4+
F-- Stormwater NO3- + N H4+
<-- POTW NO3-
�— POTW NH4+
Novick and Senn 2013
Multi- Permit Plan
• Gather information
Continue load response modeling &studies
May consider performance caps
Refine understanding and analyses
May consider load reduction, if necessary
•
•I•l�[:
Effluent
Monitoring
Nutrient
studies
•
Load
Variability
Reporting
Treatment
optimization
& upgrades
evaluation
Br.
Time Line