The redevelopment of the Jätkäsaari harbour area in Helsinki will create housing space for 15000 inhabitants and provide 6000 jobs. The main project goal is to create a high-standard, pleasant and safe urban environment. It is a solution to the growing need of new dwellings around Helsinki.
The area has been created by filling the sea with soil. Since it is a perfectly flat area, the only shield from sea winds, blowing from three directions, is represented by the buildings. This has been an important consideration in planning the buildings’ height and the location of buildings and parks. Due to the low temperatures reached during the winter, even low winds can be very uncomfortable for residents.
For the detailed plan of the Jätkäsaari, WSP Wind Engineering conducted rigorous wind mapping study using wind-tunnel tests and local wind records. Pedestrian level winds were assessed using the both mean and gust wind speed data. WSP delivered a new method to map wind chill temperature index (WCTI) in analogy to wind mapping studies.
Challenges in the project originate from the creation of new methods and comprehensive statistical analysis needed for wind and temperature records.
Client’s benefits from WSP’s solution included:
- verification of the effectiveness of design solutions affecting wind-comfort
- obtaining new objective information of wind effects; the interaction of wind and low temperature; and the significance of possible additional improvements.