[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Atmospheric dispersion
Mistake: I meant the z direction, not the +-x direction. Sorry.
John Andrews
John Andrews wrote:
> Glenn,
>
> It doesn't really make any difference in the x direction. Consider
> that any molecule distributed in the +x direction is matched with a
> similar molecule distributed in the -x direction, thus the
> concentration is not diluted, assuming of course that the wind
> velocity is not zero and the wind speed is greater than the speed of
> diffusion. Think about it. The puff case does assume that there is
> diffusion in the z direction. See "Meteorology and Atomic Energy --
> 1968," David H. Slade, Editor, US AEC. See Section 4-10.3 for a
> discussion of instantaneous experiments.
>
> John Andrews
> Knoxville, Tennessee
>
> Glenn marshall wrote:
>
>> Does anyone out there do a lot of atmospheric dispersion modeling in
>> your spare time? For an instantaneous point source release, where can I
>> find (or how can I determine) the instantaneous dispersion parameter in
>> the X direction (sigma-sub-xI)?
>>
>> Using the Rad Health Handbook 3rd edition, Table 11.3.1.2 provides the
>> equations. Table 11.3.4 provides values and approximations for
>> instantaneous dispersion parameters in the Y and Z directions, but not
>> for the X direction.
>> Can anyone offer me any insight?
>>
>> Thanks,
>>
>> Glenn Marshall
>>
>>
>>
>
>
> ************************************************************************
> You are currently subscribed to the Radsafe mailing list. To unsubscribe,
> send an e-mail to Majordomo@list.vanderbilt.edu Put the text
> "unsubscribe
> radsafe" (no quote marks) in the body of the e-mail, with no subject
> line.
> You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/
>
>
************************************************************************
You are currently subscribed to the Radsafe mailing list. To unsubscribe,
send an e-mail to Majordomo@list.vanderbilt.edu Put the text "unsubscribe
radsafe" (no quote marks) in the body of the e-mail, with no subject line.
You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/