Calculation of Pasquill-Gifford Graph:approximate relationship

Calculation of Pasquill-Gifford Graph:approximate relationship

1Downwind distance:xm-
2GraphPlot Input Data:
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Keyword・Reference・Remarks・History

LaTex

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Keyword

Pasquill-Gifford Graph,The Pasquill-Turner Stability Index,Downwind distance,Dispersion Coefficient,approximate relationship.

Reference

[1]:公害研究対策センター:『窒素酸化物総量規制マニュアル』,pp.156
[2]:社団法人土木学会:『環境工学公式・モデル・数値集』,pp.253
[3]:Met Éireann, the Irish National Meteorological Service:Stability Indices

Remarks

・Downwind distance(m):x
・Dispersion Coefficient(m):σy,σz
・Caution:Cautioned about result when input downwind distance from a source is less than 100m or more than 100,000m.
・Stability categories
Surface wind speed at 10m(m/s) Insolation Night
- Strong Moderate Slight ≧ 4/8 Low Cloud ≦ 3/8 Cloud
<2 A A-B B G G
2-3 A-B B C E F
3-5 B B-C C D E
5-6 C C-D D D D
>6 C C D D D

History

・2010/09/17:Upload

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