Flow Monitoring in the Collection System September 11, 2014
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1 Flow Monitoring in the Collection System September 11, 2014 FISHBECK, THOMPSON, CARR, & HUBER INC. Lori Lloyd, PE, LEED AP BD+C
2
3 Definitions Why Flow Monitor? Flow Monitoring Applications Site Selection Lessons Learned Agenda
4 Flow (gpm) DWF Typical daily flow from the system 140 City of Niles Meter 3 18-inch DWF :00 AM 6:00 AM 12:00 PM 6:00 PM 12:00 AM Weekday DWF Weekend DWF Dry Weather Flow
5 DWI groundwater entering the sanitary sewer system through indirect paths like at pipe joints and lateral connections Dry Weather Infiltration
6 Flow (gpm) Rainfall (inches) WWF sewer flows in addition to DWF that occur during a precipitation event City of Ecorse Meter 10-7/27 Event 0 7/27/12 7/28/12 7/29/12 Wet Weather Flow Dry Weather Flow Rainfall Wet Weather Flow
7 RDII stormwater entering the sanitary sewer system through direct and indirect connections like catch basins, down spouts, and pipe joints Rainfall Dependent Inflow/Infiltration
8 Measure discharge for billing purposes Establish dry weather flow patterns Quantify and isolate wet weather flow Reasons to Flow Monitor
9 Credit: Alan Cressler Why Flow Monitor?
10 Sewage overflows Basements back ups Capacity assurance/ MDEQ compliance Transport and treatment costs Why Flow Monitor?
11 5/2 5/9 5/16 5/23 5/30 6/6 6/13 6/20 6/27 Flow (MGD) Flow (Gallons per day) Average Monthly Flow (gpd) Rainfall (In) Rainfall (Inches) I/I problem? MORs/WWTP data and lift station data 100 6,000, Meridian Lift Station Township Daily Flow City of Flint Monthly Flow WWTP Flows ,000,000 4,000, ,000, ,000, ,000, /1/11 12:00 AM 7/29/11 12:00 AM 8/26/11 12:00 AM 9/23/11 12:00 AM 10/21/11 12:00 AM 11/18/11 12:00 AM 12/16/11 12:00 AM 9.0 Feb Mar Apr May Jun Jul Aug Sep Oct Nov WWTP Raw Data Rainfall Main Flow 2009 Central 2010 Flow Total 2011 Flow 2012 Rainfall Who Needs to Flow Monitor?
12 I/I study Flow monitoring Modeling Sewer System evaluation study (SSES) One Step in the Process
13 Flow monitoring a decision-making tool Collect data used to model collection system Establish DWF patterns Identifying areas with high WWF Flow Monitoring Applications
14 Flow (gpm) Establish diurnal or seasonal flow patterns 150 Meter 7 12-inch DWF :00 AM 6:00 AM 12:00 PM 6:00 PM 12:00 AM Weekday DWF Weekend DWF Dry Weather Flow Patterns Diurnal Curve
15 Flow (gpm) 400 Saginaw Chippewa Indian Tribe Meter 2 15-inch DWF Weekday Weekend Dry Weather Flow Patterns Casino
16 Flow (gpm) 2500 City of Flint Meter 9 48-inch DWF :00 AM 6:00 AM 12:00 PM 6:00 PM 12:00 AM Weekday Weekend Dry Weather Flow Patterns Industrial
17 DWF Patterns Seasonal Variations
18 Flow (gpm) Rainfall (inches) 4, City Village of Lincoln of Baldwin Park Meter /14 5/9 Event 0.0 3, , , , , , /13/12 5/9/14 8/14/12 8/15/12 8/16/12 5/10/14 Wet Weather Wet Weather Flow Flow Dry Weather Dry Weather Flow Flow Rainfall Rainfall Wet Weather Flow Patterns
19 Flow monitoring process Installation Things to consider Ideal site Site Selection
20 Area Velocity Measurements Q = A x V V ISCO 2150 d Sigma 910 ISCO LaserFlow Marsh-McBirney Flo Dar Types of Flow Monitors
21 Monitoring program development Site selection and installation Data collection and handling Data analysis Flow Monitoring Process
22 Confined space certified personnel needed for installation Proper installation provides for accurate measurements and can prevent malfunctions and data loss Air Monitoring Installation
23 Program objectives Physical criteria Accessibility Security Budget Site Selection Considerations
24 Flow (gpm) Rainfall (inches) Meter 6 - Flow Chart 12, , ,000 1 FM MH 6, ,000 Ideal 2 2, /1/12 7/6/12 7/11/12 7/16/12 7/21/12 7/26/12 7/31/12 3 Raw Data Rainfall Ideal Site
25 Ideal Site
26 Flow (gpm) Rainfall (inches) 400 CSO #003 (24-inch) - Flow Chart MH FM Less Ideal 7/5/14 7/6/14 7/7/14 7/8/14 7/9/14 7/10/14 7/11/14 7/12/14 7/13/14 7/14/14 7/15/ Raw Data Rainfall Less Ideal Site
27 Less Ideal Site
28 Where to install flow monitors? Monitor all areas contributing to the WWTP or pump station Monitor areas of suspected high I/I Site Selection
29 Straight through manhole No other incoming sewers or laterals Adequate depth and velocity Not within the influence of a lift station No surcharging Easily accessible Free of excess grease or debris Ideal Site
30 Site Selection Lessons Learned
31 Site hydraulics Lift station Site access Grease/debris Site Selection Lessons Learned
32 Flow (gpm) Rainfall (inches) 1,600 Meter 8 - Flow Chart 0 1, ,200 1, Sensor 0 7/8/12 7/10/12 7/12/12 7/14/12 7/16/12 7/18/12 7/20/ Raw Data Rainfall Multiple Incoming pipes
33 Ideal Site?
34 Flow (gpm) Rainfall (inches) Meter 4 - Flow Chart Sensor /11/14 4/12/14 4/13/14 4/14/14 4/15/14 4/16/14 4/17/14 4/18/14 4/19/14 4/20/14 4/21/14 Raw Data Rainfall Low Depth
35 Flow (gpm) Rainfall (inches) Meter 1 WWTP 2, , , , Sensor /6/14 5/11/14 5/16/14 5/21/14 5/26/14 5/31/14 6/5/14 6/10/14 6/15/14 6/20/14 Raw Data 2 Rainfall Low Velocity
36 Flow (gpm) Rainfall (inches) 400 Meter 11 - Flow Chart /20/12 7/21/12 7/22/12 7/23/12 7/24/12 7/25/12 7/26/12 7/27/12 7/28/12 7/29/12 7/30/12 Raw Data Rainfall Lift Station Influence
37 Flow (gpm) Rainfall (inches) 5,000 Meter 4-4/15 Event 0.0 4, , , , , , , , /14/12 4/15/12 4/16/12 4/17/12 4/18/12 4/19/12 4/20/12 4/21/12 Wet Weather Flow Rainfall Lift Station Influence
38 Accessibility
39 Accessibility
40 Accessibility
41 Accessibility
42 Accessibility
43 Accessibility
44 Accessibility
45 Accessibility
46 Accessibility/Security
47 Flow (gpm) Rainfall (inches) Meter 11 - Flow Chart 2, , , , /7/12 12/12/12 12/17/12 12/22/12 12/27/12 1/1/13 1/6/ Raw Data Rainfall Silt Covering Sensor
48 Silt and Seasonal Variation
49 Flow (gpm) Rainfall (inches) Meter 7 - Flow Chart /1/12 2/3/12 2/5/12 2/7/12 2/9/12 2/11/12 2/13/12 2/15/12 2/17/12 1 Grease on Sensor
50 Credit: Bill Lackey Ideal Site?
51 Know the objectives of your flow monitoring program Allow enough budget and time to collect necessary data Work closely with field staff when picking sites Flow vary greatly between systems and seasons Careful site selection can save time and money Conclusions
52 Thank You Questions? FISHBECK, THOMPSON, CARR, & HUBER INC.
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Climate Division: CA 1 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 52.4 35.4 43.9 69
SYSTEM BRIEF DAILY SUMMARY
SYSTEM BRIEF DAILY SUMMARY * ANNUAL MaxTemp NEL (MWH) Hr Ending Hr Ending LOAD (PEAK HOURS 7:00 AM TO 10:00 PM MON-SAT) ENERGY (MWH) INCREMENTAL COST DAY DATE Civic TOTAL MAXIMUM @Max MINIMUM @Min FACTOR
Climatography of the United States No
Climate Division: CA 7 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) 44.5 29.3 36.9 69 1951
Climatography of the United States No
Climate Division: CA 4 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 61.9 42.0 52.0 89
The Huong River the nature, climate, hydro-meteorological issues and the AWCI demonstration project
The Huong River the nature, climate, hydro-meteorological issues and the AWCI demonstration project 7th GEOSS AP Symposium, the AWCI parallel session May 27, 214, Tokyo National Centre for Hydro-Meteorological
Climatography of the United States No
Climate Division: CA 6 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 66.1 38.3 52.2 91
Climatography of the United States No
Climate Division: CA 6 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) 68.5 45.7 57.1 90 1971
Climatography of the United States No
Climate Division: CA 1 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 1 Number of s (3) Jan 56.2 4.7 48.5 79 1962
Climatography of the United States No
Climate Division: CA 2 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 55.6 38.8 47.2 81
Climatography of the United States No
Climate Division: CA 5 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) 59.3 31.5 45.4 80 1976
Climatography of the United States No
Climate Division: CA 2 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) 53.3 37.1 45.2 77 1962
Climatography of the United States No
Climate Division: CA 2 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 53.5 37.6 45.6 78
Climatography of the United States No
Climate Division: CA 2 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) 53.3 31.8 42.6 74+ 1975
Climatography of the United States No
Climate Division: CA 4 NWS Call Sign: Month (1) Min (2) Month(1) Extremes Lowest (2) Temperature ( F) Lowest Month(1) Degree s (1) Base Temp 65 Heating Cooling 100 Number of s (3) Jan 61.4 33.1 47.3 82+