System Optimization: The First Step in CSO Control Alternatives Development
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1 System Optimization: The First Step in CSO Control Alternatives Development Don Walker NEWEA 215 Specialty Conference Series October 26, 215
2 Outline System Characterization ü Groundwork for system optimization Examples of Typical Optimization Measures ü Static weir raising ü Localized hydraulic relief ü Vortex valves ü Bending weirs ü Pump station operations ü Use of remote flow/level monitoring to optimize existing facility operation Page 2
3 System Characterization First step in LTCP development ü Collection system mapping/gis ü Flow monitoring ü Inspection data ü Collection system modeling Develop system understanding & confidence in analytical tools used to assess optimization measures Page 3
4 Optimization Approach Search for opportunities what to look for: ü Large-diameter pipes with available capacity ü Flow restrictions/areas of high headloss ü Under-utilized tanks/facilities ü Pump capacities ü CSO regulator configurations Page 4
5 Modeling Tools Profiles Level and Flow vs. Time Color-coding output for pipe surcharge state, velocities, etc. Page 5
6 Example: Static Weir Raising Incrementally raise weir in model Crown el in Combined Sewer Weir el 8.3 Overflow Check performance in typical year Check HGL impact in larger storm Look for opportunity to lengthen weir to offset higher HGL Watch out for: Impacts to other outfalls Adverse HGL impacts upstream or downstream Page 6
7 Example: Hydraulic Relief Start of Outfall Pressure Sewer Existing Regulator To Outfall To Interceptor 12-inch diameter Dry Weather Flow Connection Schematic Plan View Page 7
8 Example: Hydraulic Relief Ground Surface Crown of Pipe Peak HGL Existing Regulator Pressure Sewer To Outfall Start of Outfall Pressure Sewer Existing Regulator To Outfall To Interceptor 12-inch diameter Dry Weather Flow Connection Schematic Plan View Page 8
9 Example: Hydraulic Relief Ground Surface Crown of Pipe Peak HGL Existing Regulator Pressure Sewer To Outfall Start of Outfall Pressure Sewer Existing Regulator To Outfall To Interceptor Schematic Plan View Page 9 Proposed Relief of Dry Weather Flow Connection
10 Example: Hydraulic Relief Existing Regulator with DWF Connection Relief Relief of DWF connection reduced CSOs in typical year BUT: Model predicted adverse HGL impact downstream of relief point during 25-year storm Solution: Provide vortex valve in regulator to limit peak flow through DWF connection Page 1
11 Example: Hydraulic Relief Overflow to Outfall Influent Combined Sewer Flow to Interceptor Limited by Vortex Valve Example of Regulator with Vortex Valve Page 11
12 Example: Bending Weirs A common issue: Raising weir provides benefit in small storm, but creates unacceptable increase in upstream HGL in larger storm Solution: Provide bending weir instead of static raised weir John Meunier Grande Water Management Systems Page 12
13 Example: Pump Station Optimization Proposed Channel Tunnel Dewatering Pump Station (CTDS) Force Main from Channel PS Southeast Lift Station (SELS) Southeast WWTP Bruce Flynn PS (BFS) (Wet Weather Only) Question: Can the existing pump stations be used to optimize the dewatering of the Channel Tunnel? Page 13
14 Example: Pump Station Optimization SELS HGL CTDS* HGL Flow (mgd) BFS HGL CTDS* 1 mgd 1 9 BFS 9 mgd 6 SELS 6mgd Page 14
15 Example: Storage Optimization Page 15
16 Example: Storage Optimization Page 16
17 Example: Storage Optimization Page 17
18 Example: Storage Optimization Page 18
19 Optimization Performance Summary Scorecard Strategy Name: Base North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Evans, Hudson & Yosemite CSD Sunnydale CSD Brief Narrative: Base case: current operational strategies and Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG) existing system configuration. To be used as reference for Count 4 Count 11 Count 9 Count 1 Count Count Operational Overflow Goals: Volume/ North Basin Central Basin South Basin Frequency Results: Volume (MG) 37 Volume (MG) 1244 Volume (MG) Count 4 Count 11 Count Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Total CSD Control Goals Volumes (MG) Maximize storage in Sunnydale T/S Box Maximize storage in Yosemite T/S Box Islais Creek CSD Storage Evans, Utilization with respect Hudson to Baseline Condition & (%) Yosemite CSD Maximize storage in Islais Creek T/S Box North Shore T/S Channel T/S Islais Creek T/S Yosemite T/S Sunnydale T/S Maximize storage in Channel T/S Box Small Storm Maximize storage in North Shore T/S Box Medium Storm Maximize total flow to SEP Large Storm Maximize secondary flow to 1 SEP Maximize total NPF + SEP volume Improve velocities in NPM 5th and Berry Henry Adams BFS Flooding in LOS Storm (Y/N) Baker and Marina Blvd 17th and Folsom NSS Bluxome and 6th Reduce CSD volume/counts Y Y N Y Y N Y Existing Summary Mariposa, 2th, 22nd CSD Su Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG Count 9 Count Count Count Central Basin Sansome and Union.9 DWF Minimum Velocity (ft/s) 9th and Harrison NPM from 16th and Harrison Mission and 3rd Volume (MG) 11 Count NPF NPM NSFM CHS BFS SELS GFS SDS Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Use rainfall forecast (EOS) Pump WWF to Channel Modify level set points Keep SEP at 25 MGD if possible Keep SEP at 25 MGD if possible PID off Yosemite T/S level Lower weir on 78" sewer Use rainfall Use rainfall forecast (EOS) Keep SEP at 25 MGD if possible Use Islais Creek & Channel T/S levels Use storm characterization Keep SEP at 25 MGD if possible Raise on/off set points Use rainfall forecast Use storm characterization Use storm characterization Use rainfall forecast (EOS) Use fourth pump (total at 15 MGD) Use rainfall forecast (EOS) Use rainfall forecast (EOS) Use rainfall forecast Use storm characterization Use rainfall forecast Use rainfall forecast 1282 Use rainfall forecast (EOS) EOS: Rainfall forecost to determine end of storm Modify channel gates controls Use rainfall forecast SEP Primary CSD over baffle CSD through gate Total CSD South Basin UWA Storage Utilization with respect to Baseline Condition (%) Channel T/S NPM Modifications Other Modifications Control Elements CSD Preferential Discharges Passive controls of dropout Re- activate 3" force main Add active gate at Alana Way Prioritize Baker outfall for discharge Active controls of dropout Increased flow capacity at NPF Prioritize Howard/Brannan outfalls for discharge Islais Creek T/S Yosemite T/S Active control at 16th and Harrison NPM Flushing Prioritize Islais Creek N. outfall for discharge Use storm characterization Increased flow capacity at NSFM Prioritize Evans outfall for discharge Use rainfall forecast Prioritize Fitch outfall for discharge Shut 16th St. Gate Rehab NPM with liner N=.9 No Sediment Flooding in LOS Storm (Y/N) Page 19 S
20 Optimization Performance Summary Scorecard North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 69 Count 4 Count 11 Count 9 Count 1 Strategy Name: Base North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Evans, Hudson & Yosemite CSD Sunnydale CSD Brief Narrative: Base case: current operational strategies and Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG) existing system configuration. To be used as reference for Count 4 Count 11 Count 9 Count 1 Count Count Operational Goals: North Basin Central Basin South Basin Results: Volume (MG) Count 37 4 Volume (MG) Count Volume (MG) Count Treatment North Basin Volume Central Basin Volume (MG) 37 Volume (MG) 1244 Count Count 11 Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Total CSD Control Goals Volumes (MG) Maximize storage in Sunnydale T/S Box Maximize storage Summary in Yosemite T/S Box Storage Utilization with respect to Baseline Condition (%) Maximize storage in Islais Creek T/S Box North Shore T/S Channel T/S Islais Creek T/S Yosemite T/S Sunnydale T/S Maximize storage in Channel T/S Box 4 Small Storm Maximize storage in North Shore T/S Box Medium Storm Maximize total flow to SEP Maximize secondary flow to SEP Maximize total NPF + SEP volume Large Storm Flooding in LOS Storm (Y/N) Improve velocities in NPM 5th and Berry Henry Adams BFS Baker and Marina Blvd 17th and Folsom NSS Bluxome and 6th Reduce CSD volume/counts Y Y N Y Y N Y Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Volumes (MG) Existing Sansome and Union.9 DWF Minimum Velocity (ft/s) 9th and Harrison NPM from 16th and Harrison Mission and 3rd.3..4 NPF NPM NSFM CHS BFS SELS GFS SDS Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Use rainfall forecast (EOS) Pump WWF to Channel Modify level set points Keep SEP at 25 MGD if possible Keep SEP at 25 MGD if possible PID off Yosemite T/S level Lower weir on 78" sewer Use rainfall Use rainfall forecast (EOS) Keep SEP at 25 MGD if possible Use Islais Creek & Channel T/S levels Use storm characterization Keep SEP at 25 MGD if possible Raise on/off set points Use rainfall forecast Use storm characterization Use storm characterization Use rainfall forecast (EOS) Use fourth pump (total at 15 MGD) Use rainfall forecast (EOS) Use rainfall forecast (EOS) Use rainfall forecast Use storm characterization Use rainfall forecast Use rainfall forecast Use rainfall forecast (EOS) EOS: Rainfall forecost to determine end of storm Modify channel gates controls Use rainfall forecast Small Storm Medium Storm Large Storm North Shore T/S Storage Utilization with respect to Baseline Co Channel T/S Islais Creek T/S UWA NPM Modifications Other Modifications Control Elements CSD Preferential Discharges Passive controls of dropout Re- activate 3" force main Add active gate at Alana Way Prioritize Baker outfall for discharge Active controls of dropout Increased flow capacity at NPF Prioritize Howard/Brannan outfalls for discharge Active control at 16th and Harrison NPM Flushing Prioritize Islais Creek N. outfall for discharge Use storm characterization Increased flow capacity at NSFM Prioritize Evans outfall for discharge Use rainfall forecast Prioritize Fitch outfall for discharge Shut 16th St. Gate Rehab NPM with Y liner N=.9 Y N No Sediment Flooding in LOS Storm (Y/N) 5th and Berry Henry Adams BFS Baker and Marina Blvd Y Sansome and Union Page 2 9th and Harrison DWF Minimum Velocity (ft/s) NPM from 16th and Harrison
21 CHS BFS SELS GFS Optimization Performance Summary Scorecard Strategy Name: Base North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Evans, Hudson & Yosemite CSD Sunnydale CSD Brief Narrative: Base case: current operational strategies and Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG) existing system configuration. To be used as reference for Count 4 Count 11 Count 9 Count 1 Count Count Operational Goals: North Basin Central Basin South Basin North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Results: Volume (MG) 37 Volume (MG) 1244 Volume (MG) Count 4 Count 11 Count Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Total CSD Control Goals Volumes (MG) Maximize storage in Sunnydale T/S Box Maximize storage in Yosemite T/S Box Storage Utilization with respect to Baseline Condition (%) Maximize storage in Islais Creek T/S Box North Shore T/S Channel T/S Islais Creek T/S Yosemite T/S Sunnydale T/S Maximize storage in Channel T/S Box Small Storm Volume (MG) 37 Volume (MG) 1244 Volume (MG) Maximize storage in North Shore T/S Box Medium Storm Storage Utilization Maximize total Count flow to SEP 4 Count Large Storm 11 Count Maximize secondary Summary flow to SEP Maximize total NPF + SEP volume Flooding in LOS Storm (Y/N) Improve velocities in NPM 5th and Berry Henry Adams BFS Baker and Marina Blvd 17th and Folsom NSS Bluxome and 6th Reduce CSD volume/counts Treatment NFP Primary SEP Secondary Y SEP Primary Y NCSD over baffle Y CSD through Y gate N Total CSD Y Existing UWA Evans, Hudson & Yosemite CSD Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Count 4 Count 11 Count 9 Count 1 Count North Basin Central Basin So Volumes (MG) Small Storm Medium Storm North Shore T/S Sansome and Union.9 DWF Minimum Velocity (ft/s) 9th and Harrison NPM from 16th and Harrison Mission and 3rd.3..4 Storage Utilization with respect to Baseline Condition (%) Channel T/S Islais Creek T/S Yosemite T/S NPF NPM NSFM CHS BFS SELS GFS SDS Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Use rainfall Large forecast Storm (EOS) Pump WWF to Channel Modify level set points Keep SEP at 25 MGD if possible Keep SEP at 25 MGD if possible PID off Yosemite T/S level Lower weir on 78" sewer Use rainfall Use rainfall forecast (EOS) Keep SEP at 25 MGD if possible Use Islais Creek & Channel T/S levels Use storm characterization Keep SEP at 25 MGD if possible Raise on/off set points Use rainfall forecast Use storm characterization Use storm characterization Use rainfall forecast (EOS) Use fourth pump (total at 15 MGD) Use rainfall forecast (EOS) Use rainfall forecast (EOS) Use rainfall forecast Use storm characterization Use rainfall forecast Use rainfall forecast Flooding in LOS Use Storm rainfall forecast (Y/N) (EOS) EOS: Rainfall forecost to determine end of storm Modify channel gates controls Use rainfall forecast 5th and Berry Henry Adams BFS Baker and Marina Blvd 17th and Folsom NSS Y Y N Y Y N NPM Modifications Other Modifications Control Elements CSD Preferential Discharges Passive controls of dropout Re- activate 3" force main Add active gate at Alana Way Prioritize Baker outfall for discharge DWF Minimum Velocity (ft/s) Active controls of dropout Increased flow capacity at NPF Prioritize Howard/Brannan outfalls for discharge Active control Sansome at 16th and Harrison and Union NPM Flushing 9th and Harrison NPM from 16th Prioritize and Harrison Islais Creek N. outfall for discharge Use storm characterization Increased flow capacity at NSFM Prioritize Evans outfall for discharge Use rainfall forecast.9 Prioritize Fitch outfall for discharge Shut 16th St. Gate Rehab NPM with liner N=.9 No Sediment 1282 Mission and 3rd.3..4 Page 21
22 Optimization Performance Summary Scorecard Strategy Name: Base North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Evans, Hudson & Yosemite CSD Sunnydale CSD Brief Narrative: Base case: current operational strategies and Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG) existing system configuration. To be used as reference for Count 4 Count 11 Count 9 Count 1 Count Count Operational Goals: North Basin Central Basin South Basin Results: Volume (MG) Count 37 4 Volume (MG) Count Volume (MG) Count Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Total CSD Control Goals Volumes (MG) Maximize storage in Sunnydale T/S Box Maximize storage in Yosemite T/S Box Storage Utilization with respect to Baseline Condition (%) Maximize storage in Islais Creek T/S Box North Shore T/S Channel T/S Islais Creek T/S Yosemite T/S Sunnydale T/S Maximize storage in Channel T/S Box Small Storm Maximize storage in North Shore T/S Box Medium Storm Maximize total flow to SEP Maximize secondary flow to SEP Maximize total NPF + SEP volume Large Storm Flooding in LOS Storm (Y/N) Improve velocities in NPM 5th and Berry Henry Adams BFS Baker and Marina Blvd 17th and Folsom NSS Bluxome and 6th Reduce CSD volume/counts Flooding and Dry Weather Velocity Summaries Y Sansome and Union.9 Y N Y Y N Y DWF Minimum Velocity (ft/s) 9th and Harrison NPM from 16th and Harrison Mission and 3rd.3..4 Existing NPF NPM NSFM CHS BFS SELS GFS SDS Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Use rainfall forecast (EOS) Pump WWF to Channel Modify level set points Keep SEP at 25 MGD if possible Keep SEP at 25 MGD if possible PID off Yosemite T/S level Lower weir on 78" sewer Use rainfall Use rainfall forecast (EOS) Keep SEP at 25 MGD if possible Use Islais Creek & Channel T/S levels Use storm characterization Keep SEP at 25 MGD if possible Raise on/off set points Use rainfall forecast Use storm characterization Use rainfall forecast (EOS) Use storm characterization Use rainfall forecast (EOS) Use rainfall forecast (EOS) Use rainfall forecast Use fourth pump (total at 15 MGD) Use storm characterization Use rainfall forecast Use rainfall forecast Use rainfall forecast (EOS) EOS: Rainfall forecost to determine end of storm Modify channel gates controls Use rainfall forecast UWA NPM Modifications Other Modifications Control Elements CSD Preferential Discharges Passive controls of dropout Re- activate 3" force main Add active gate at Alana Way Prioritize Baker outfall for discharge Active controls of dropout Increased flow capacity at NPF Prioritize Howard/Brannan outfalls for discharge Active control at 16th and Harrison NPM Flushing Prioritize Islais Creek N. outfall for discharge Use storm characterization Increased flow capacity at NSFM Prioritize Evans outfall for discharge Use rainfall forecast Prioritize Fitch outfall for discharge Shut 16th St. Gate Rehab NPM with liner N=.9 No Sediment Page 22
23 Optimization Performance Summary Scorecard Strategy Name: Base North Shore CSD Mission Creek CSD Mariposa, 2th, 22nd CSD Islais Creek CSD Evans, Hudson & Yosemite CSD Sunnydale CSD Brief Narrative: Base case: current operational strategies and Volume (MG) 37 Volume (MG) 544 Volume (MG) 4 Volume (MG) 696 Volume (MG) Volume (MG) existing system configuration. To be used as reference for Count 4 Count 11 Count 9 Count 1 Count Count Operational Goals: North Basin Central Basin South Basin Results: Volume (MG) Count 37 4 Volume (MG) Count Volume (MG) Count Treatment NFP Primary SEP Secondary SEP Primary CSD over baffle CSD through gate Total CSD Control Goals Volumes (MG) Maximize storage in Sunnydale T/S Box Maximize storage in Yosemite T/S Box Storage Utilization with respect to Baseline Condition (%) Maximize storage in Islais Creek T/S Box North Shore T/S Channel T/S Islais Creek T/S Yosemite T/S Sunnydale T/S Maximize storage in Channel T/S Box Small Storm Maximize storage in North Shore T/S Box Medium Storm Maximize total flow to SEP Maximize secondary flow to SEP Maximize total NPF + SEP volume Large Storm Flooding in LOS Storm (Y/N) Improve velocities in NPM 5th and Berry Henry Adams BFS Baker and Marina Blvd 17th and Folsom NSS Bluxome and 6th Reduce CSD volume/counts Y Y N Y Y N Y Sansome and Union.9 DWF Minimum Velocity (ft/s) 9th and Harrison NPM from 16th and Harrison Mission and 3rd.3..4 Existing NPF NPM NSFM CHS BFS SELS GFS SDS Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Existing strategy Use rainfall forecast (EOS) Pump WWF to Channel Modify level set points Keep SEP at 25 MGD if possible Keep SEP at 25 MGD if possible PID off Yosemite T/S level Lower weir on 78" sewer Use rainfall Use rainfall forecast (EOS) Keep SEP at 25 MGD if possible Use Islais Creek & Channel T/S levels Use storm characterization Keep SEP at 25 MGD if possible Raise on/off set points Use rainfall forecast Use storm characterization Use rainfall forecast (EOS) Use storm characterization Use rainfall forecast (EOS) Use rainfall forecast (EOS) Use rainfall forecast Use fourth pump (total at 15 MGD) Use storm characterization Use rainfall forecast Use rainfall forecast Use rainfall forecast (EOS) EOS: Rainfall forecost to determine end of storm Modify channel gates controls Use rainfall forecast UWA NPM Modifications Other Modifications Control Elements CSD Preferential Discharges Passive controls of dropout Re- activate 3" force main Add active gate at Alana Way Prioritize Baker outfall for discharge Active controls of dropout Increased flow capacity at NPF Prioritize Howard/Brannan outfalls for discharge Active control at 16th and Harrison NPM Flushing Prioritize Islais Creek N. outfall for discharge Use storm characterization Increased flow capacity at NSFM Prioritize Evans outfall for discharge Use rainfall forecast Prioritize Fitch outfall for discharge Shut 16th St. Gate Rehab NPM with liner N=.9 No Sediment Alternative combinations Page 23
24 Summary System Characterization provides understanding and tools to conduct optimization evaluations Use modeling tools to identify and evaluate alternatives Watch out for potential adverse impacts Develop output format to facilitate comparison of alternatives Page 24
25 Thank You May 14, 215
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