WHAT TYPE OF HEAT SUPPLY IS PLANNED?

An efficient district heating concept based on the use of renewable energy sources will be used for the Fischbeker Reethen district. The intention is to meet high quality standards by using 100 per cent renewable energy, which already significantly exceeds the legal requirements under the Building Energy Act. Heat for the district will be distributed from a heat station in the centre of Fischbeker Reethen to consumers via a district-wide heating network. Solar panels will be installed on all roofs in the vicinity of the district heat station and combined with rooftop planting. This has the additional effect of cooling the urban area, avoiding heat islands and increasing biodiversity.

WHAT TYPE OF POWER SUPPLY IS PLANNED?

The power supply in Fischbeker Reethen will also be as sustainable as possible and based on increased use of renewable energies. In accordance with the Hamburg Climate Protection Act, all roofs of new buildings must be fitted with solar panels to generate electricity. This should reduce the consumption of fossil fuels and reduce carbon emissions. From 2027, it will also be mandatory under law to combine solar panels with rooftop planting in a so-called ‘solar green roof’.

CLIMATE PROTECTION AND ADAPTATION – WHAT MEASURES WILL BE IMPLEMENTED?

In terms of climate change, both measures to mitigate climate change (climate protection) and measures to adapt to the consequences of climate change (climate adaptation) are relevant.

Environmentally sustainable buildings for climate protection

The planning, construction and operation of the buildings in Fischbeker Reethen will be environmentally sustainable by design. This is ensured through IBA Hamburg’s environmental sustainability strategy, which applies to all buildings. Buildings are constructed in accordance with the requirements of the ‘Sustainable Building Quality Seal’ of the Federal Department for Housing, Urban Development and Building. The submission of a Building Resource Passport is also required. Verification of buildings that can be dismantled and/or separated as well as of the use of rainwater for façade planting and outdoor facilities also support environmental sustainability.

Rooftop planting as a climate change adaptation measure

Ecological diversity will be encouraged by using roof areas as fifth façades in the form of extensive, in-depth rooftop planting. Above all, this should be utilised to create a valuable habitat for various insects and other species through diverse planting.

The issue of rainwater retention on green roofs also plays a key role in the drainage concept for Fischbeker Reethen, with the result that 70 per cent of the roofs in the district are expected to be planted. Rooftop planting also helps with adaptation to climate change and the resulting increased planting in urban areas improves the microclimate. Furthermore, retention green roofs can collect more rainwater, which has an increased cooling effect for the district. Multiple use of the roofs through planting, retention and energy generation by solar panels is the aim and is particularly suitable for flat and gently sloping roofs.

ARE NATURE CONSERVATION MEASURES PLANNED? WHAT COMPENSATORY MEASURES WILL BE TAKEN?

So-called buffer areas are used to compensate for interventions in the ecosystem, as a result of urban development, for example. In Hamburg, as in the whole of Germany, statutory regulations are in place on interventions and compensatory measures in nature conservation that apply in Fischbeker Reethen.

The following applies to Fischbeker Reethen: Around 16.6 hectares of buffer area will be secured for nature conservation within the planning area and around 62.8 hectares outside the area.

Planting measures are specified in the development plan for the entire area, which will serve to restore and create new biotope and vegetation structures with functions for wildlife conservation. This will create new habitats for wild animals and plants.

The measures in the commercial areas include, for example, continuous strips of trees and shrubs to structure the individual building plots as well as façade planting for extended partial habitats, for breeding birds, for example. Wherever possible, retained rainwater should be used to irrigate façade planting and other private green areas.

Rooftop planting is stipulated for the development of substitute and partial habitats for animals such as insects and birds.

By stipulating open surface drainage in Fischbeker Reethen, the trench drainage system will be maintained and further developed and consequently elements typical of the landscape with much needed habitats will be safeguarded. Open surface drainage is also positive for fauna.

WHAT SPECIFIC MEASURES WILL BE TAKEN TO PROTECT NATURE?

Extensive nature conservation measures are an important part of any district development. These will be worked out very precisely for the different phases. Some measures will start before construction begins and other defined requirements will be implemented during the actual construction phase. There will be special protection for breeding birds and bats in Fischbeker Reethen. A detailed summary can be found here: Nature conservation measures in Fischbeker Reethen