Page 409 - Fundamentals of Air Pollution 3E

Questions 363

2. In attempting to determine the air pollution impact of a small town containing several
industrial facilities in a mountainous river valley about 1 km wide with sloping sides
extending 400-500 m above the river, what meteorological measurement program would
you recommend and what facts would you try to determine before finalizing your recom-
mendation?
3. Over relatively flat terrain, which of the following measurements would be expected to
represent conditions most closely at a second site 10 km away: wind velocity or total
amount of cloud?
4. What areas of the contiguous United States have the least air pollution potential as defined
J
by mixing heights of less than 1500 m with wind speeds of less than 4 m s~ through the
mixing height? Which areas have the greatest air pollution potential?
5. What is the variation in relative concentration exceeded 10% of the time in a 10-km city
over the contiguous United States for mornings? For afternoons?
6. From Fig. 21-10, what wind directions are related to highest average winter sulfur dioxide
concentrations at this sampling station?
7. If one considers a contribution to the annual concentration from point sources as significant
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when it exceeds 2 /xg m" , using Fig. 21-11, what wind directions account for significant
point source contributions at this station?