Dispersion from Non-point Sources

Dispersion from Non-point Sources - 9/13/11 Aerosol &...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 11 Line Sources - = 2 2 1 exp 2 2 ) , ( z z H u q x C σ σ π Q: The difference from a point source? If wind direction is normal to the line of emission When the wind is not perpendicular to the line source ) 45 ( sin ) 90 ; , ( ) ; , ( o o x C x C = φ φ φ φ Wind direction Line of emissions ( 29 ( 29 φ φ sin 90 u u = q : source strength per unit distance Examples of line sources? 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 22 Q: Wind at 4 m/s is blowing perpendicular to the highway. Traffic density along the highway is 8000 vehicles per hour with an average vehicle speed of 40 mi/hr. The average vehicle emission rate is 2 10-2 g/s. Estimate the concentration at a point 300 m downwind from the highway at 5:30 pm. 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate 33 If the line is short, consider the end effect (F inite L ength L ine S ource ) +- + -- × - × = 2 2 2 2 1 exp 2 1 exp 2 exp 2 z z y y z H z H z y u qdy dC σ σ σ σ πσ ∫- × +- + -- × = 2 1 2 ) 5 . exp( 2 1 exp 2 1 exp 2 ) , ( 2 2 2 p p z z z dp p H z H z u q x C π σ σ σ π y y y p y p σ σ / / 2 2 1 1 = = 9/13/11 Aerosol & Particulate 9/13/11 Aerosol & Particulate...
View Full Document

This note was uploaded on 09/11/2011 for the course ENV 6146 taught by Professor Staff during the Spring '11 term at University of Florida.

Page1 / 14

Dispersion from Non-point Sources - 9/13/11 Aerosol &...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online