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Canarina DISPER Software · air toxics dispersion model · algorithms 7

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Canarina DISPER Software · air toxics dispersion model

 

9.1.2 Downwind and Crosswind Distances 

The model uses a Cartesian receptor network. All receptor points are converted to Cartesian (X,Y) coordinates prior to performing the dispersion calculations. In the Cartesian coordinate system, the X axis is positive to the east of the user-specified origin and the Y axis is positive to the north. The user must define the location of each source with respect to the origin of the grid using Cartesian coordinates. If the X and Y coordinates of the source are X(S) and Y(S), the downwind distance x to the receptor, along the direction of plume travel, is given by:

 

x=-[X(R)-X(S)]sin(WD)-[Y(R)-Y(S)]cos(WD)        (2)

 

where WD is the direction from which the wind is blowing. The downwind distance is used in calculating the distance-dependent plume rise and the dispersion parameters. The crosswind distance y to the receptor from the plume centerline is given by:

 

 

y=-[X(R)-X(S)]cos(WD)-[Y(R)-Y(S)]sin(WD)        (3)

 

 

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Canarina DISPER Software · air toxics dispersion model

It is interesting for air quality control, dispersion modeling, air pollution, quality management, air dispersion, air dispersion modeling, air modeling, air quality modeling, air quality monitoring, air monitoring, pollution control, air quality management, air quality information, air pollution control, air quality data, air quality regulations, air toxics, air analyses, air toxics emissions, air toxics programs, air toxics monitoring

 

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