2.1 POINT SOURCE EMISSIONS

 

2.1.1 The Gaussian Sector Average Equation

 

     The ISC long‑term model makes the same basic assumption as the short‑term model.  In the long‑term model, the area surrounding a continuous source of pollutants is divided into sectors of equal angular width corresponding to the sectors of the seasonal and annual frequency distributions of wind direction, wind speed, and stability.  Seasonal or annual emissions from the source are partitioned among the sectors according to the frequencies of wind blowing toward the sectors.  The concentration fields calculated for each source are translated to a common coordinate system (either polar or Cartesian as specified by the user) and summed to obtain the total due to all sources.

 

     For a single stack, the mean seasonal concentration is given by:

  

where:

 

=  units scaling coefficient (see Equation (1‑1))


 

    Q

 

=  pollutant emission rate (mass per unit time), for the ith wind‑speed category, the kth stability category and the lth season

 

 

 

351 - 352 - 353 - 354 - 355 - 356 - 357 - 358 - 359 - 360 - 361 - 362 - 363 - 364 - 365 - 366 - 367 - 368 - 369 - 370 - 371 - 372 - 373 - 374 - 375 - 376 - 377 - 378 - 379 - 380 - 381 - 382 - 383 - 384 - 385 - 386 - 387 - 388 - 389 - 390 - 391 - 392 - 393 - 394 - 395 - 396 - 397 - 398 - 399 - 400

    Flag of Portugal 

 english:

 castellano: DISPER CUSTIC DESCAR RADIA    italiano:     

 

 français:    português:  

 

deutsch:

 

 

 

deutsch: DIS CUS  DES  RAD

castellano: DIS CUS DES  RAD   english: DIS CUS DES RAD  

 

 português: DIS CUS DES RAD   italiano:   DIS CUS  DES RAD

 

français:  DIS CUS DES RAD