Open space concept

The inner courtyard is a semi-public area dedicated to the residents, shielded from the play promenade by shrubs. Surrounded by trees, the large meadow offers space to play and relax. The play equipment is grouped together as long linear play equipment and positioned on the west side facing the promenade so that it takes up as little space as possible. The areas for the youngest and older children are discreetly separated from each other. They each have seating – some with tables – for the parents. Further table/bench combinations are positioned away from the play sculpture so that children can withdraw.

In addition, an area for urban gardening has been integrated into the inner courtyard as an option to give interested residents the opportunity to grow vegetables and herbs on a communal plot, but on their own raised bed.

The private patio areas are separated from the inner courtyard by a planting area with a mixture of low flowering shrubs and tall, robust grasses and perennials, so that privacy is maintained at all times without the need for hedges. An upstand between the semi-public courtyard and the planting of the private terrace areas also ensures a clear separation of the areas.

The private access routes are designed in such a way that they not only provide access to the flats, but can also serve as fire service access and set-up areas.

A central element of the structural design is the generous greening of the façades, in which – depending on the exposure – a selected range of robust climbing plants is used to improve the microclimate and contribute to the natural cooling of the buildings through both the shading and the evapotranspiration of the climbing plants. The greening of the façades also creates an attractive, green appearance and supports biodiversity.

To promote natural water circulation and prevent flooding, the roof surfaces are designed as retention roofs. The focus of this greening is on optimising biodiversity for the site. The degree of sealing of the open spaces was deliberately kept as low as possible. Permeable surfaces enable efficient infiltration, and the play area is modelled accordingly so that it can also serve as a temporary retention area.

Outdoor facilities / outdoor play concept
The concept of different levels of experience is taken up again in the outdoor facilities. The open space is divided into two clearly defined zones with different play and recreational opportunities. In the south, in contrast to the railway embankment, a green fringe of trees and shrubs, an adventure jungle of shrubs and hedges is created, which takes up the topography of the site and slopes slightly from south to north. A clear edge defines the remaining height difference of approx. 1 metre and the transition to the adjacent experience level, which is at building level. An outdoor catering area and three play bubbles are created here, which are clearly recognisable thanks to their uniform circular shape and offer an intimate play atmosphere. Climbing, bouldering and trampoline jumping facilities are located here and complement the informal appropriation and play opportunities of the adventure jungle with further cross-generational offers.

A sculptural climbing frame accentuates the central play bubble in the centre of the open space. As a connecting element between the outdoor catering area, adjacent to the building, and the play area, it also assumes a guiding function for visitors. A viewing tower on the boundary between the upper and lower experience levels picks up on the special theme of stairs and ups and downs for the cinema. Exciting views of the railway and the Saale river are provided here, creating a visual link between the different experience levels. Steps and seating elements offer the opportunity to linger, while new tree plantings provide shade and a spatial organisation of the outdoor area. A paved path surface in the outdoor catering area and in the north-eastern access route does justice to the high frequency of use of the site. EPDM as a fall protection surface marks the play bubbles. The colour of the paved surfaces supports the special effect of the green façade of the Lichtspielhaus. The high proportion of otherwise unpaved surfaces ensures a pleasant microclimate and meets the current requirements for a sustainable and climate-friendly open space.

The new small stone paving made of natural stone connects the square areas across the street and draws them together into a single unit. Motorised traffic is guided across the square and sensitised to the use of the square by the visual and tactile change in material.
By slightly reducing the width of the carriageway in favour of the open space, a large, appropriate area is created in front of the organ museum. The space can be used as a place to stay and for catering. Large benches, some with backrests, will be placed around the existing tree in the centre of the square to create a spacious recreation area. The tree is integrated into the paved square with an open tree disc. A space for markets and festivals will be created around the central element to enliven the city centre square. The square will be furnished discreetly and appropriately for the location.

The furniture is made from certified wood and regionally produced materials to avoid long delivery routes. Passing the organ museum on the side, you reach the third area. The green frame also surrounds this area with a lush green back. The square will have a water-bound path surface with light-coloured litter, setting it apart from the central town square in terms of design and giving it its own identity. The existing trees will also be integrated into the new square in order to create large crowns with appropriate shade. A fountain enlivens the small square and provides a pleasant soundscape. The catering facilities are distributed around three sides of the organ museum and thus enliven the adjacent open spaces.

Modelling ❘ The entire park area is modelled according to these demands and uses, with the principal aim of ensuring all materials remain on site. Excavated spoil from the depression will be employed to form small hills for play and relaxation, or landscaped with plants. The new island will also use this spoil to form it and build it up. Here, intensive greening complete with nesting and nourishing shrubs and insect hotels provides a refuge for animals.

Resources and planting ❘ In selecting materials, emphasis has been placed on the responsible use of resources. Great importance is attached to ensuring short supply routes, using local materials and CO2-neutral forms of production. The extent of paved areas is deliberately kept to a minimum. It is only the meandering paths and the access routes through the park that have a water-permeable surface, whereby the top layer is strewn with a local gravel mix. The area next to the lake will be paved in keeping with the overall plan for the lake promenade. The steps in front are made of prefabricated concrete elements, providing an attractive place to linger right by the water. Furniture and play equipment in the park will be manufactured from certified, durable wood. Planting in the park is deliberately varied, with intensively planted areas alternating with open lawns and meadows. Towards the periphery, areas become more intensively planted. Not only do the various tree types stand closer together, they are also underplanted with shrubs. These are nourishing shrubs and thus provide habitats for animals. In selecting the plants, careful thought has been given to species diversity and sustainability, with a view to increasing biodiversity in the park.

Walkway

A path leads along the existing wall over steps, which serves as a new north-south connection and leads directly to Judengasse. A barrier-free path starts further east and also leads via the central square to the connecting path. The average gradient is 4.5%, creating a comfortable, intergenerational place to pass through and spend time.

The small Moritzplatz on Bertholdstrasse serves as the entrance to the new green area in the Moritz neighbourhood. Seating on benches and steps will be created here, inviting people to linger and meet.

Residence

A pavilion can be erected below the police building with two sides directly adjacent to the central square. This pavilion offers sufficient space for outdoor seating for café use and provides a limited view of the police building and the car park behind it. Instead, it directs the view towards the new connection to Judengasse.

Planting

The intensive greening creates a small urban oasis that meets both the requirements of modern city centre open spaces and the challenges of the changing climate. Rainwater can seep away and evaporate directly on the large green areas, while large trees provide shade and thus prevent the paved areas from heating up. These trees are carefully selected to ensure that they can withstand long dry spells in summer.

Squares and streetscapes

The boulevard, which runs through the entire neighbourhood, connects all areas with each other and represents the inner development axis. The space is flanked on both sides by green spaces that extend from the buildings into the boulevard to varying degrees. This gives the entire space a green appearance. The carriageway meanders through these green spaces.

The four neighbourhood squares lined up along the boulevard have different functions. Osramplatz forms the prelude to the neighbourhood. This is an urban square with cafés, benches and open spaces for markets and events. In the evening, the planted areas here shine in a special light and form circles on the ground. Further south is the smaller Ledvance neighbourhood square. Neighbourhood get-togethers take place here. LED panels in the ground shine here when the square is in use. Wolframplatz will have a special highlight. An illuminated wire spans between the existing trees, creating a special atmosphere in the evening hours. Another square is being created between the workshops in the north. Here, craftsmanship takes centre stage. Small exhibitions and markets will be held here.

Trees and plants

All existing trees in the neighbourhood will be preserved in order to use the quality of the already established trees. The existing trees will be supplemented by planting climatic trees. These are characterised by the fact that they can cope with extreme rainfall and waterlogged soils, but also with longer periods of drought. To avoid having to replace the soil for each tree planting, the site is partially backfilled with the existing material. This gives the trees sufficient root space without having to completely remove the old backfill. When selecting the plants, attention is paid to shallow-rooted species. A species-rich planting of shrubs in front of the residential buildings offers both protection for residents and a habitat for many bird and insect species. The green axes are accompanied at the edges by plantings of shrubs and grasses, which require little maintenance due to their lush and dense growth.

Resilient perennials and grasses are planted within the infiltration troughs, which recover quickly even after long periods under water and also survive longer dry periods well.

Rainwater management

In order to create a sustainable neighbourhood, it is primarily important to unseal the surfaces as extensively as possible. This can create a natural climate with infiltration and evaporation directly on site. However, due to the pollution of the soil in the neighbourhood, this is associated with high costs. The design envisages directing rainwater from the neighbourhood into the designated troughs, where the water can collect and seep away. In these areas, the soil is replaced down to below the layers of backfill so that the rainwater can seep unhindered to the groundwater. In order to channel the rainwater into these troughs, the rest of the site will be partially raised.

Raingardens will be created in front of the buildings facing Berliner Allee. The rainwater from the footpaths and cycle paths and the excess rainwater from the roof areas will be channelled into these areas. Thanks to the revitalised soil layers, the cleaned water can seep into the groundwater or evaporate again on the surface. In the event of heavy rainfall, the trough formation allows water to accumulate and gradually seep away.

The roofs are greened and designed as low retention roofs. This means that rainwater can be retained on the roofs and is available for plants and evaporation.

Open space concept

Opposite the large traffic area of the bus station, the new station forecourt acts as a green link between the unvegetated functional area – the new station and office building and Rialtoboulevard. The interplay between paved surfaces, tree-covered areas of grasses and shrubs and a water feature means that the square not only fulfills its function as a high-traffic transit space, but – equipped with robust street furniture – also becomes an attractive place for waiting people, strollers and visitors to the restaurant. As the adjacent traffic areas are expected to become even hotter in the future, the station forecourt outside the movement areas will be covered with large-crowned, shady trees, which, in combination with the evaporative cooling effect of the fountain, promise a significant cooling effect. The roadway for the buses in the square area will be made of in-situ concrete with the same aggregates and the same color nuances as the pavement in order to ensure a consistent, uniform overall impression.