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Wastewater Workgroup. Conference Call December 6, 2011. Estimating Point Sources for Progress Scenarios. Issues/Concerns: Comparable modeling of Point and NP sources for progress runs, milestones, Bay Barometer NPS: estimates are based on 10-year average hydrology - PowerPoint PPT PresentationTRANSCRIPT
Wastewater Workgroup
Conference CallDecember 6, 2011
2
Estimating Point Sources for Progress Scenarios
• Issues/Concerns:1. Comparable modeling of Point and NP
sources for progress runs, milestones, Bay Barometer – NPS: estimates are based on 10-year average hydrology – PS: estimates are based on discharge flow data
2. PS flow discharge data is influenced by weather conditions
3. Accounting for reductions in recently upgraded facilities where discharge data is not available.
3
Estimating Point Sources for Progress Scenarios
• Actions Requested: – Provide feedback on proposed
supplemental indicators– Provide feedback on methodology – Decide on flow averaging period– Decide on TN, TP for upgrade facilities
where data is not yet available.
4
Point Sources WWTPFlow CY2000 - CY2010
400
500
600
700
Flow
(mgd
)
Progress Scenarios – Flow ComparisonAre we comparing Apples and Oranges?
Non Point Sources2000 - 2010 Average Precipitation
30.00
35.00
40.00
45.00
50.00
55.00
60.00
65.00
inch
es
Qave Nonpoint Sources
Qave Point Sources
5
Precipitation CY 2000 - 2010
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
inch
es
Major Municipal WWTPFlow CY2000 - CY2010
400
450
500
550
600
650
700
Flow
(mgd
)
2001WWTP Flow = 515 mgd
TN Load 14.94 M lb
2007WWTP Flow = 536.3 mgd
TN Load 12.67 M lb
2001Prec = 37.43 inches
2007Precip = 37.62 inches
WWTP Annual Flows CY 2000 - 2010
Annual Precipitation CY 2000 - 2010
Precipitation vs Flows/Loads
General Trend: Dry years => Lower WWTP Flows Wet Years => Higher WWTP Flows
6
Total Total EDU OSDS WWTP
Estimated Flow Increase at Major
WWTPs
Estimated Flow Increase at Major
WWTPs 2001-2007Population change EDUs EDUs EDUs mgd mgd
7/1/2000 to 7/1/2001 64,454 25,782 7,500 18,282 4.57 2.29
7/1/2001 to 7/1/2002 64,880 25,952 7,500 18,452 4.61 4.61
7/1/2002 to 7/1/2003 56,795 22,718 7,500 15,218 3.80 3.80
7/1/2003 to 7/1/2004 45,951 18,380 7,500 10,880 2.72 2.72
7/1/2004 to 7/1/2005 39,861 15,944 7,500 8,444 2.11 2.11
7/1/2005 to 7/1/2006 29,676 11,870 2,500 9,370 2.34 2.34
7/1/2006 to 7/1/2007 22,046 8,818 2,500 6,318 1.58 1.58
7/1/2007 to 7/1/2008 24,413 9,765 2,500 7,265 1.82 0.91
7/1/2008 to 7/1/2009 40,823 16,329 2,500 13,829 3.46
7/1/2000 to 7/1/2009 388,899 155,560 47,500 108,060 27.01 18.08
Estimated WWTPs Flow Increase based on Population Growth
7
ENR Upgraded WWTP (13 Facilities)Flow 2000 - 2010
10
12
14
16
18
20
22
24
26
28
20002001
20022003
20042005
20062007
20082009
2010
Flow
(mgd
)
ENR Upgraded WWTP (13 facilities)TN Load 2000 - 2010
0.00
0.20
0.40
0.60
0.80
1.00
1.20
20002001
20022003
20042005
20062007
20082009
2010
TN (
Mill
ion
lb/y
r)
Annual Upgraded WWTP Flows
Annual TN Load
8
ENR Upgraded WWTP (13 Facilities)Flow 2000 - 2010
10
12
14
16
18
20
22
24
26
28
20002001
20022003
20042005
20062007
20082009
2010
Flow
(mgd
)
ENR Upgraded WWTP (13 Facilities)Weighted TN Concentrations 2000 - 2010
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20002001
20022003
20042005
20062007
20082009
2010
TN (m
g/l)
Annual Flow Weighted TN Concentrations
Trend – Concentration decreasesshowing Progress
Annual Upgraded WWTP Flows
9
ENR Upgraded WWTP (13 Facilities)Flow 2000 - 2010
10
12
14
16
18
20
22
24
26
28
20002001
20022003
20042005
20062007
20082009
2010
Flow
(mgd
)
ENR Upgraded WWTP (13 Facilities)Weighted TP Concentrations 2000 - 2010
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
20002001
20022003
20042005
20062007
20082009
2010
TP (m
g/l)
Annual Flow Weighted TN Concentrations
Trend – Concentration decreasesshowing Progress
Annual Upgraded WWTP Flows
10
Major Municipal WWTPFlow 2000 - 2010
400
450
500
550
600
650
700
20002001
20022003
20042005
20062007
20082009
2010
Flow
(mgd
)
Actual
Rolling 3 Yr Average
Rolling 5 Yr Average
Rolling 10 Yr Average
11
Major Municipal WWTPTN Load 2000 - 2010
10.00
11.00
12.00
13.00
14.00
15.00
16.00
17.00
20002001
20022003
20042005
20062007
20082009
2010
TN (
Mill
ion
lb/y
r)
Actual Total Load
Roll ing 3 Yr Ave Flow with Weighted TNConcentrationRoll ing 5 Yr Ave Flow with Weighted TNConcentrationRoll ing 10 Yr Ave Flow with WeightedTN Concentration
12
Estimating Point Sources for Progress Scenarios
• Proposed supplemental indicators– Use 10-year rolling average to estimate
PS Loads– Use Actual TN, TP for facilities operating
with upgrades for about a year – Use default TN, TP for facilities where
data is not yet available