Content
Calculation examples
Each plot of land can be designed in various ways. In principle, measures that lead to an expansion of the area of vegetation on the ground are given priority. Only then should additional possibilities, such as the replacement of asphalt and concrete with other surfaces, be utilized.
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Land area
479 m²
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Developed area
279 m²
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Undeveloped area
200 m²
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Degree of development
0,59
The courtyard is mainly covered with asphalt. There is gravel with grass coverage on the periphery, and the tree stands in a soil bed that measures 1 m².
Calculation: BAF Ground state
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140 m² Asphalt
x 0,0 = 0 m²
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59 m² gravel with grass coverage
x 0,5 = 30 m²
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1 m² open soil
x 1,0 = 1 m²
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BAF: 31/479 = 0,06
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BAF target = 0.3
Planning variant 1
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Land area
479 m²
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Developed area
279 m²
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Undeveloped area
200 m²
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Degree of development
0,59
Achieving the targeted BAF will require measures that amount to a BAF of 0.24.
By reducing the area covered by asphalt and changing the type of surfacing, as well as by significantly expanding the area covered by vegetation, a BAF of 0.3 can be realized on this plot of land.
Calculation: BAF Variant 1
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115 m² area covered by vegetation
x 1,0 = 115,0 m²
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85 m² mosaic paving
x 0,3 = 25,5 m²
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BAF: 140,5/479 = 0,3
Street / Land | Total area (m²) | Developed area (m²) | Undeveloped area (m²) | Existing-BAF 0.06 |
---|---|---|---|---|
Calculation example | 479 | 279 | 200 | BAF 0,3 |
Surface type / weighting-factor per m² Portion of each surface type relative to the total area in m² | Amount | EEA* Amount | Planned | EEA* Planned |
Sealed surfaces 0,0 | 140 | 0 | ||
Partially sealed surfaces 0,3 | 85 | 25,5 | ||
Semi-open surfaces 0,5 | 59 | 30 | ||
Surfaces with vegetation unconnected to soil below and with < 80 cm of soil covering 0,5 | ||||
Surfaces with vegetation unconnected to the soil below and with > 80 cm of soil covering 0,7 | ||||
Surfaces with vegetation connected to the soil below 1,0 | 1 | 1 | 115 | 115 |
Rainwater infiltration per m² of runoff area 0,2 | ||||
Vertical greenery up to a maximum of 10 m in height 0,5 bis 0,7 | ||||
Greenery on rooftop 0,5 bis 0,8 | ||||
Ecologically effective surface area | 31 | 140,5 | ||
BAF = ecologically effective surface area : total land area |
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BAF = 140,5 : 479 | Existing BAF 0,06 | Planned BAF 0,3 |
Planning variant 2
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Land area
479 m²
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Developed area
279 m²
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Undeveloped area
200 m²
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Degree of development
0,59
Building a covered bicycle stand means that the portion of partially sealed surfaces must be increased.
It is therefore necessary to utilize roof and fire wall surfaces in order to achieve the required BAF.
Calculation: BAF Variant 2
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21 m² concrete surface
x 0,0 = 0,0 m²
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79 m² area covered by vegetation
x 1,0 = 79,0 m²
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100 m² mosaic paving
x 0,3 = 30,0 m²
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10 m² greenery
covering wallsx 0,5 = 5,0 m²
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41 m² reenery covering rooftop
x 0,7 = 29,0 m²
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BAF: 143/479 = 0,3
Street / Land | Total area (m²) | Developed area (m²) | Undeveloped area (m²) | Existing-BAF 0.06 |
---|---|---|---|---|
Calculation example | 479 | 279 | 200 | BAF 0,3 |
Surface type / weighting-factor per m² Portion of each surface type relative to the total area in m² | Amount | EEA* Amount | Planned | EEA* Planned |
Sealed surfaces 0,0 | 140 | 0 | 21 | 0 |
Partially sealed surfaces 0,3 | 100 | 30 | ||
Semi-open surfaces 0,5 | 59 | 30 | ||
Surfaces with vegetation unconnected to soil below and with < 80 cm of soil covering 0,5 | ||||
Surfaces with vegetation unconnected to the soil below and with > 80 cm of soil covering 0,7 | ||||
Surfaces with vegetation connected to the soil below 1,0 | 1 | 1 | 79 | 79 |
Rainwater infiltration per m² of runoff area 0,2 | ||||
Vertical greenery up to a maximum of 10 m in height 0,5 | 10 | 5 | ||
Greenery on rooftop 0,7 | 41 | 29 | ||
Ecologically effective surface area | 31 | 143 | ||
BAF = ecologically effective surface area : total land area |
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BAF = 140,5 : 479 | Existing BAF 0,06 | Planned BAF 0,3 |
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Contact
Senate Department for the Environment, Transport and Climate Protection
Dr. Sebastian Hausmann
- Tel.:
- +49 30 9025-1254
District information on landscape plans
Concrete information on the calculation of the BAF for building plots that are included in a BAF landscape plan is provided by the respective responsible districts.