english:

 

 

                                 

 

     The modified σz equation for a squat building is given by:

where the building height hb is in meters.  For a tall building, Huber (1977) suggests that the width scale hw replace hb in Equation (1‑37).  The modified σz equation for a tall building is then given by:

where hw is in meters.  It is important to note that σz´ is not permitted to be less than the point source value given in Tables 1‑2 or 1‑4, a condition that may occur.

     The vertical virtual distance, xz, is added to the actual downwind distance x at downwind distances beyond 10hb for squat buildings or beyond 10hw for tall buildings, in order to account for the enhanced initial plume growth caused by the building wake.  The virtual distance is calculated from solutions to the equations for rural or urban sigmas provided earlier.

 

 

 

 

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  APLICACIONES 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