Diploma thesis in Physics submitted by Florian Freundt born in ...

3 Sampling sites and methods 3.1. Setup of the sampling sites
SITE B
SITE A
SITE C
Figure 3.2: Location of the sites created and sampled for this study [Source: Google Maps,
map data provided by Tele Atlas].
of sand and gravel and another layer of about 450 cm of clay (see Figure 3.3). Below a depth of
5 m the ground primarily consists of sand and gravel.
The site was equipped with three soil air sampling tubes, the inlet screens located at depths 6 m,
4 m and 2 m. Temperature sensors were installed at 2.5 m, 1.0 m and 0.1 m, the latter located
inside the buried equipment box.
Site B
Sampling Site B (see Figures 3.4 and C.3) was located in an agricultural environment near
Handschuhsheim, at the coordinates N49 ◦ 25.775 ′′ E8 ◦ 39.760 ′′ at 109 m above sea level, see Figure
3.2. The borehole was placed very close to the end of a hedge, partly covered by its leaves. A
paved road of approximately 2 m width runs from north to south, at a distance of 1.5 m to the
borehole. The immediate surrounding consists of a small meadow with apple trees, enclosed by
agriculturally used land.
The soil at the site consists predominantly of clay as well: The first 5 cm of turf are followed by
320 cm of clay, increasingly humid with depth. The following layer consisted of 25 cm of humid,
sandy clay. Below 3.5 m the clay displays a reddish gravel fraction.
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