| 摘要 |
<p>The product is taken of a coefficient (B1) and central axis vertical sectional areas (Sp1, Sp2) of dust source search regions relating to evaluation points (iM, iN) at a coordinate point (p) in first and second generation source search regions (?(iM, it), ?(iN, it)) having a central axis extending to the windward side of a representative wind direction (WD), with the evaluation points (iM, iN) as start points; and assumed dust amounts (E1, E2) are calculated. It is then determined whether the ratio of the assumed dust amounts (E1, E2) falls within a predetermined range.</p> |
