-14-

1

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1

1

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530
.-

500

400

300

c“’
200

100

c

I
o

I

I

5

I

1

10

I

I
15

I

J
20

.

Time, s

Figure 4.

An example of a dust concentration pulse on the downwind side of
dirt
road
following
passage of a light motor vehicle,
a one-lane
11:05 a.m., May 15, 1978 (wind speed 4.5 m S-l).
s

..
(_

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