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Wilmington Tracer StudiesAkula Venkatram
Department of Mechanical EngineeringBourns College of Engineering
University of California, Riverside
1/10/2007Wilmington Senior Citizen Center
•Objective
•Background
•Approach
•Results
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Objective
To develop methods to estimate the impact of elevated (power plant) and surface sources in Wilmington on air quality in the surrounding community
Sponsored by the California Air Resources Board (ARB) and the California Energy Commission (CEC)
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Communities Next to Roads
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Small Neighborhood Businesses among Residences
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Major Industrial Activities
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LADWP Power Plant
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Background
Wind
Impact
increases with emission rate
decreases with wind speeddecreases with size of plume
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Shoreline Dispersion
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What do we measure ?
Dilution rateSampler concentrations
Dimensions of plumeSampler concentration patterns
Winds and temperaturesMeteorological instrumentation
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Approach
Release harmless tracer from sourceSample tracer at locations in the communityFigure out how material was transportedSummarize observations into method (model) that can used to estimate air quality impact of any source
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Tracer Studies
Conducted tracer studies in Wilmington, LA to obtain data on dispersion from near surface and elevated releases in urban areas
August 26th to September 10th 2004- 8 days
June 24th to June 28th 2005- 4 days
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Acknowledgements
Special thanks to:Marla Mueller, CECVlad Isakov, ARBJesse Marquez, community representativeThe Los Angeles Department of Water and PowerThe Los Angeles Sanitation District
We appreciate the help from the residents and business owners who participated in the studies
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Map of the study area:Wilmington / Long Beach
Locationsof sodar and sonic tower
Wilmington ParkElementary School
LADWPtracer releasesonicmini-sodar
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Wilmington Surroundings
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Tracer Release
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Project team at the release site
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Sampling System
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The locations of samplers
W
S N
E
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72 Sampler Locations Provided by Wilmington Residents and Businesses
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Stationary Tracer Sampler
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Tracer Bag Analysis - UCR Lab
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The Lab at UCR
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Meteorological Measurements
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CE-CERT Parking Lot
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Dugway Experiment
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Temperature Sensor and Sodar at the JWPCP site
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Temperature Profiles
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Sonic and mini-sodar at the LADWP site
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Meteorological Profiles
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Plume Spread
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Results from Wilmington 2004 Shoreline Study
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Results from Wilmington 2005 Shoreline Study
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Conclusions from Field Studies
1. Observed dilution rates range from 100 µs/m3 at 100 m to 1 µs/m3 at 1000 m
2. Elevated sources have a maximum impact of 1 µs/m3 at 5000 m
3. We can make estimates of the impact of sources if local meteorology is measured
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The PlayersOver 25 students and staff involved in the studyVolunteers from Wilmington
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Acknowledgements
Special thanks to:Marla Mueller, CECVlad Isakov, ARBJesse Marquez, community representativeThe Los Angeles Department of Water and PowerThe Los Angeles Sanitation District
We appreciate the help from the residents and business owners who participated in the studies