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adms aermod calpuff

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Complex Terrain I<br />

ADMS Complex Flow Model based on FLOWSTAR<br />

Example Askervein: Change in speed over hill<br />

Fractional speedup ratio<br />

1.0<br />

0.8<br />

0.6<br />

0.4<br />

delta S<br />

0.2<br />

0.0<br />

-1000 -800 -600 -400 -200 0 200 400 600 800 10<br />

-0.2<br />

-0.4<br />

-0.6<br />

Distance from HT (m)<br />

• AERMOD and ISC use idealised approaches<br />

• CALPUFF uses 3D time dependent flow field

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