Monitoring and Modeling of the CDOT Blue Island/Cermak Streetscape


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  • TDR measures permittivity (dielectric constant) of a material from wave propagation, and the fact that there is a strong relationship between the permittivity of a material and its water content The suction lysimeter was a cylindrical device consisting of a porous ceramic cup (to withdraw soil pore water); a body tube to act as a reservoir; and a simple stopper assembly with a single hole for pulling a vacuum and retrieving the sample.
  • Existing Conditions model used to define dynamic model that performs full solution to governing flow equations simplified TARP representation
  • slide1: This is the Infoworks program. The network is shown on the main page, with lots of the modeling components( network , rainfall, runs etc) on the left hand side. the inset graph shows the runoff hydrograph for a single subcatchment
  • -reduce size of subareas from roughly 40 acres to roughly 1 acre still significant abstraction- i.e. not EVERY catch basin, or pipe, is explicitly modeled. nevertheless, the level of detail allows us to understand the design slide 3: top- shows the infiltration loss (green) EXFILTRATIN and volume of storage for a BMP structure         bottom- shows the flow into and out of a BMP node. the difference in the integral of each line is the volume reduction to City system
  • Sensitivity-different rainfall events, increased depth of infiltration basins, reduced infiltration of pavers
  • slide 4- highly conceptual figure- as we have not performed this analysis yet. pink line- shows potential reduction in basement flooding risk . you'll notice the line slopes more with higher BMP reduction. this is just an assumption on my part, thinking that small amounts of flow reduction may have some benefit, but larger changes may have a larger impact proportionally (we can talk through if you want to)   blue line - wrp flow reduction. on second thought this maybe should be linear- but just shows the volume reduced to wrp
  • Monitoring and Modeling of the CDOT Blue Island/Cermak Streetscape

    1. 1. Monitoring and Modeling of the CDOT Blue Island/Cermak Streetscape Joseph Kozak, PhD, PE MWRDGC Sustainable Streets for Chicago June 17, 2009 METROPOLITAN WATER RECLAMATION DISTRICT OF GREATER CHICAGO
    2. 2. Acknowledgements <ul><li>David Leopold, Janet Attarian (CDOT) </li></ul><ul><li>Jim Duncker (USGS) </li></ul><ul><li>Pete Mulvaney (DWM) </li></ul><ul><li>Tim Coleman, Mason Throneburg (CH2M HILL) </li></ul><ul><li>Catherine O’Connor, Kuldip Kumar, Robert Gaggiano (MWRDGC) </li></ul>MWRDGC
    3. 3. Overview <ul><li>Background </li></ul><ul><li>Monitoring Plan Objectives </li></ul><ul><ul><li>Methods and Analysis </li></ul></ul><ul><ul><ul><li>Monitoring Locations, Equipment, Frequency, Analytical Parameters </li></ul></ul></ul><ul><ul><ul><li>Potential Additional Testing and Analysis </li></ul></ul></ul><ul><ul><li>Data Analysis and Evaluation </li></ul></ul><ul><li>Modeling Objectives </li></ul><ul><ul><li>Info Works  H&H Modeling </li></ul></ul><ul><ul><ul><li>Design Analysis </li></ul></ul></ul><ul><ul><ul><li>Uncertainty </li></ul></ul></ul><ul><ul><li>City-Wide BMP Assessment </li></ul></ul><ul><li>Summary </li></ul>MWRDGC
    4. 4. Background – Project Map MWRDGC
    5. 5. Background - BMPs <ul><li>BMPs are being installed along the Streetscape Corridor to reduce flow and pollutant loads to the local sewer system </li></ul><ul><ul><li>Permeable pavers in parking/bike lanes </li></ul></ul><ul><ul><li>Permeable pavers in sidewalks </li></ul></ul><ul><ul><li>Planters in or adjacent sidewalks </li></ul></ul><ul><ul><ul><li>Planter boxes </li></ul></ul></ul><ul><ul><ul><li>Curb inlet or runnel planters </li></ul></ul></ul><ul><ul><ul><li>Bioswales </li></ul></ul></ul><ul><ul><li>Infiltration basins </li></ul></ul>MWRDGC
    6. 6. Monitoring Plan Objectives <ul><li>Scope </li></ul><ul><ul><li>To assess the performance, effectiveness, and efficiency of individual and a collection of BMPs relative to stormwater flow and pollutant load reduction. </li></ul></ul><ul><li>This evaluation will include </li></ul><ul><ul><li>Determining pollutant load and flow control of the BMP(s) under typical operating conditions relative to current background conditions </li></ul></ul><ul><ul><li>Determining the BMP(s) response to varying storm characteristics and antecedent weather conditions </li></ul></ul><ul><ul><li>Determining BMP integrity over the course of the study </li></ul></ul>MWRDGC
    7. 7. Background/Baseline Monitoring Locations and Equipment <ul><li>Precipitation  Tipping bucket rain gauges (3) </li></ul><ul><li>Road Information System meteorological station (1) </li></ul><ul><li>Combined sewer flow </li></ul><ul><ul><li>Flow  Area flow meter (3) </li></ul></ul><ul><ul><li>Water quality collection  Autosampler (1) </li></ul></ul><ul><ul><li>Additional 4 locations from MWH </li></ul></ul><ul><li>Stormwater runoff </li></ul><ul><ul><li>Flow  Pressure transducers in catch basins (3) </li></ul></ul><ul><ul><li>Water quality collection  Autosampler (1) </li></ul></ul><ul><li>Localized groundwater (4) </li></ul><ul><ul><li>Monitoring wells and pressure transducer </li></ul></ul><ul><li>Combined sewer overflows (2) </li></ul><ul><ul><li>Outflow into South Branch of Chicago River </li></ul></ul>MWRDGC
    8. 8. Study monitoring locations and equipment (Post construction) <ul><li>Rain gauges, meteorological station, combined sewer, monitoring wells, CSOs, and catch basin locations remain the same as background </li></ul><ul><li>Any monitoring locations not affected by construction will remain as well </li></ul><ul><li>Soil, soil water, and biomass (13) </li></ul><ul><ul><li>Planter boxes, curb inlet planters, and bioswales </li></ul></ul><ul><ul><ul><li>Soil moisture  Time Domain reflectometer </li></ul></ul></ul><ul><ul><ul><li>Soil water quality collection  lysimeter </li></ul></ul></ul><ul><ul><ul><li>Soil quality  auger samples </li></ul></ul></ul><ul><ul><ul><li>Biomass quality  Dead and living biomass </li></ul></ul></ul><ul><ul><ul><li>Water level in bioswales </li></ul></ul></ul>MWRDGC
    9. 9. Study Monitoring Locations and Equipment (Cont.) <ul><li>Three overflow structures from BMP(s) will be monitored </li></ul><ul><ul><li>Parking lane permeable pavers along Blue Island </li></ul></ul><ul><ul><li>Planter boxes and infiltration basins sidewalks on north side of Cermak </li></ul></ul><ul><ul><li>Bioswales and infiltration basins on south side of Cermak </li></ul></ul><ul><li>Pressure transducer or flow meter and auto sampler at overflow points for studied BMP(s) </li></ul>MWRDGC
    10. 10. Monitoring Frequency <ul><li>Rain gauges are triggered by 0.1” precipitation event </li></ul><ul><li>Meteorological station is continuous </li></ul><ul><li>All area flow meters are continuous </li></ul><ul><li>All pressure transducers are continuous </li></ul><ul><li>All auto samplers are flow triggered </li></ul><ul><li>Soil, soil water, and biomass collected bi-monthly with occasion event based sampling </li></ul><ul><li>Monitoring wells are monitored bi-monthly </li></ul><ul><li>CSOs are event based </li></ul>MWRDGC
    11. 11. Media Analytical Parameters <ul><li>Water </li></ul><ul><ul><li>Total solids, BOD, COD, Heavy Metals, TP, TN, FOG, pH, Chlorides, and polycyclic aromatic hydrocarbons (PAHs) </li></ul></ul><ul><li>Soil, Sediment, and Biomass </li></ul><ul><ul><li>BOD, COD, Heavy Metals, TP, TN, Chlorides, PAHs, Ca, Mg, K, and Na </li></ul></ul><ul><li>Dry Deposition Material (if applicable) </li></ul><ul><ul><li>Heavy Metals, TN, Chlorides, and PAHs </li></ul></ul>MWRDGC
    12. 12. Potential Additional Testing and Analysis <ul><li>Collect sump deposition for media analysis </li></ul><ul><li>Collect atmospheric deposition for media analysis </li></ul><ul><li>Perform ring infiltrometer tests on paver and planters </li></ul>MWRDGC
    13. 13. Data Analysis and Evaluation <ul><li>All data will be collected in accordance with the EPA’s National Stormwater BMP Database for potential reporting purposes </li></ul><ul><li>Perform flow and load reduction analysis </li></ul><ul><ul><li>Simple percent reductions </li></ul></ul><ul><ul><li>Efficiency ratios </li></ul></ul><ul><ul><li>Mass balance </li></ul></ul>MWRDGC MWRDGC
    14. 14. Limitations and Concerns <ul><li>Aging infrastructure </li></ul><ul><li>Sampling combined sewer and overflow structures </li></ul><ul><li>Vandalism </li></ul>MWRDGC
    15. 15. Modeling Objectives <ul><li>Develop a comprehensive H&H model to characterize background conditions and BMPs/BMP performance </li></ul><ul><li>Develop a simplistic water quality model using monitoring data and EPA BMP database </li></ul><ul><li>Develop a simplistic model to examine implementation of BMPs across a service area scale </li></ul>MWRDGC
    16. 16. Info Works CS Model <ul><li>InfoWorks CS is an effective tool with which to undertake hydrological modeling of the complete urban water cycle </li></ul><ul><li>Incorporates full solution modeling of backwater effects and reverse flow, open channels, trunk sewers, complex pipe connections and complex ancillary structures </li></ul>MWRDGC
    17. 17. Model Background & Objectives <ul><li>City Trunk Sewer model (Infoworks CS) completed in 2008 includes: </li></ul><ul><ul><li>all sewers ≥ 42” diameter </li></ul></ul><ul><ul><li>all CSOs and connecting pipes </li></ul></ul><ul><ul><li>inlet restrictors (rainblocker system) </li></ul></ul><ul><ul><li>MWRDGC interceptors, pumping stations, and connecting structures to TARP </li></ul></ul><ul><ul><li>river level representation </li></ul></ul><ul><li>Detailed H&H Analysis of Streetscape Design: </li></ul><ul><ul><li>Goal is to optimize design elements to meet performance goals </li></ul></ul><ul><li>City-Wide Planning Analysis of BMP improvements </li></ul><ul><ul><li>Goal is to assess impact of varying levels of BMP implementation across City </li></ul></ul>MWRDGC
    18. 18. Hydrologic and Hydraulic (H&H) Modeling <ul><li>Simulate land surface response to rainfall (hydrology) </li></ul><ul><li>Conveyance of combined sewer flows to outlets- WRPs and CSOs (hydraulics) </li></ul><ul><li>Why use a model? </li></ul><ul><ul><li>Characterize existing system performance </li></ul></ul><ul><ul><ul><li>basement flooding risk </li></ul></ul></ul><ul><ul><ul><li>CSO frequency and volume </li></ul></ul></ul><ul><ul><ul><li>undersized infrastructure identification </li></ul></ul></ul><ul><ul><li>Plan / Design solutions that meet desired level of service </li></ul></ul>MWRDGC
    19. 19. Detailed Design Analysis <ul><li>Drainage areas defined to specific BMP elements (~ 1 acre) </li></ul><ul><li>Design components included in model </li></ul><ul><ul><li>Storage volume in stone layer </li></ul></ul><ul><ul><li>Infiltration rates based on field testing results </li></ul></ul><ul><ul><li>Controlling elevation to City system </li></ul></ul><ul><li>Examine design modification impact on performance (i.e. reduced stormwater load to collection system) </li></ul>Example: Infiltration Loss and BMP storage Example: Flow reduction to City system MWRDGC
    20. 20. Understanding Uncertainty <ul><li>Monitoring / Calibration </li></ul><ul><ul><li>gauge data provides model comparison at local scale </li></ul></ul><ul><ul><li>BMP monitoring will help understand performance </li></ul></ul><ul><ul><li>as additional information becomes available, can be incorporated into model or future designs </li></ul></ul><ul><li>Sensitivity Analysis </li></ul><ul><ul><li>which parameters most impact performance </li></ul></ul><ul><ul><li>how might age/maintenance issues impact performance? </li></ul></ul>MWRDGC
    21. 21. City-Wide BMP Assessment <ul><li>Translate understanding from detailed model to City scale </li></ul><ul><li>Simplified – high level modeling approach </li></ul><ul><ul><li>runoff reductions </li></ul></ul><ul><li>Evaluate various levels of City-Wide implementation </li></ul><ul><ul><li>What areas most sensitive to more green infrastructure? </li></ul></ul><ul><ul><li>What is the overall reduction in loading to system and WRP? </li></ul></ul>MWRDGC
    22. 22. Summary <ul><li>Monitoring and modeling program work together to optimize design </li></ul><ul><li>Continued monitoring will improve understanding of BMP performance </li></ul><ul><li>Citywide modeling provides opportunity to identify areas where BMP improvements are most beneficial  efficiently prioritize investment dollars </li></ul>MWRDGC