pollution rate emission rate(Q) = 0 = 0 gram/second |

average wind speed (u) = 0 = 0 meter/second |

y direction plume standard deviation (σ _{y})= 0 = 0 meter |

z direction plume standard deviation (σ _{z})= 0 = 0 meter |

y position (y) = 0 = 0 meter |

z position (z) = 0 = 0 meter |

effective stach height (H) = 0 = 0 meter |

plume contaminant concentration at a point in space (C) = NOT CALCULATED |

Select to solve for a different unknown

Gaussian plume dispersion model developed by Pasquill

wind speed at elevation from known wind speed and elevation

wind speed at elevation | |

weather station wind speed | |

elevation | |

weather station elevation | |

stability parameter |

effective stack height

effective stack height | |

physical stack height | |

plume rise |

plume rise for superadiabatic conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

plume rise for neutral stability conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

plume rise for subadiabatic conditions

plume rise | |

stack gas exit speed | |

stack diameter | |

average wind speed | |

stack heat emission rate |

Where

C | = | downwind concentration |

Q | = | pollution source emission rate |

u | = | average wind speed |

σ_{y} | = | y direction plume standard deviation |

σ_{z} | = | z direction plume standard deviation |

x | = | position in the x direction or downwind direction |

y | = | position in the y direction |

z | = | position in the z direction |

H | = | effective stack height |

References - Books:

1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.

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