Environmental Engineering Reference
In-Depth Information
Fig. 2.43 River systems in Austria and their catchment areas (according to /2-13/)
At these streams and rivers, the daily mean flows can sometimes vary tremen-
dously. Fig. 2.44 shows the flows of different water levels of the Neckar river
located in the South-West of Germany as an example. Particularly the spring is
characterised by a high level of average through-flow due to the snowmelt in the
Black Forest, which can also vary significantly especially when the snowmelt is
coupled with heavy rainfalls. The last part of the year, however, is characterised
by low through-flows. The flow peaks are caused by storms with large amounts of
precipitation. These times are marked by a fast increase and an ensuing fast de-
crease in the through-flows.
700
Rockenau
Rottweil
Plochingen
600
500
Lauffen
400
300
200
100
0
1
30
60
90
120
150
180
210
240
270
300
330
360
Time in days
Fig. 2.44 Mean diurnal flow at different water levels exemplarily for the Neckar river for
one specific year (see /2-7/)
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