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4. Methods of Information Acquisition for Planning
(Nature measurements, Wind tunnels, Modelling)

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4.2.3.3 Planning-Relevant Results

Figures 4/15 und 4/16 show sample results of the sand erosion experiments for the current and planned states for the wind direction 40°.

In the current state (Figure 4/15), areas with super-elevated wind velocities – that is, where wind velocities are more than doubled (red surfaces) – are present only in the vicinity of an existing skyscraper.

In the planned state (Figure 4/16), additional such areas also appear near the planned new buildings (in the middle of the picture).

Gust wind velocity

Excess frequency

Evaluation criteria

< 6 m/s

> 6 m/s

-

max. 5%

no wind comfort problems permissible in parks, waiting ranges, road cafes, on playgrounds

> 6 m/s

> 15 m/s

max. 20%

max. 0.05%

permissible on surfaces for brief stay (less strict criterion), and/or which are fast exceeded

> 8 m/s

max. 1%

permissible within waiting and seat ranges

> 10 m/s

max. 1%

permissible on surfaces for brief residence time (strict criterion)

> 13 m/s

max. 1%

permissible at corners of a building, permissible for problem-free running

> 13 m/s

> 1%

unpleasantly, annoyingly, wind protection

> 18 m/s

> 1%

Danger

Table 4/2: Criteria for evaluating the wind conditions for a specific object, Source: LOHMEYER et al., 1992

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Fig. 4/15: Wind velocity at ground level in the current state, wind direction 40°, Source: LOHMEYER et al., 1992

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Fig. 4/16: Wind velocity at ground level in the planned state, wind direction 40°, Source: LOHMEYER et al., 1992
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