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SOLUTIONS: DISPER
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Algorithms VII · software · environmental assessment DISPER: 16 air quality management 17 air quality guidelines 18 outdoor air pollution 19 air pollution cause 20 environmental science 21 environmental monitoring 22 environmental impact assessment 23 indoor air quality 24 environmental assesment 25 air monitoring 26 modelling emissions 27 software · pollution 28 environmental engineering 29 atmospheric pollution 30 air pollution 31 environmental maps
The Dispersion Parameters Point Source Dispersion Parameters: Equations that approximately fit the PasquillGifford curves are used to calculate sig_{y} and sig_{z} (in meters) for the rural mode. The equations used to calculate sig_{y} are of the form: sig_{y}=465.11628 x tan (TH) (29) where: TH=0.017453293[c  d ln(x)] (30) In both Equations the downwind distance x is in kilometers. The equation used to calculate sig_{z} is of the form: sig_{z}=ax^{b}^{ } (31) where the downwind distance x is in kilometers and sig_{z} is in meters. Procedures Used to Account for BuoyancyInduced Dispersion The method of Pasquill is used to account for the initial dispersion of plumes. With this method, the effective vertical dispersion s_{ze} is calculated as follows: sig_{ze}=[sig_{z}^{2} +(Dh/3.5)]^{1/2}^{ } (32) where sig_{z} is the vertical dispersion due to ambient turbulence and Dh is the plume rise due to momentum or buoyancy. The lateral plume spread is: sig_{ye}=[sig_{y}^{2} +(Dh/3.5)]^{1/2}^{ } (33) where sig_{y} is the lateral dispersion due to ambient turbulence. It should be noted that Dh is the distancedependent plume rise if the receptor is located between the source and the distance to final rise, and final plume rise if the receptor is located beyond the distance to final rise.
environmental assessment Environmental assessment: With this application you will be able to import images and pictures (previously saved BMP files) to obtain pollution maps. You can work with GIS and ArcView.
