Technological

A class of thirty students of a preschool "Jeanne Hachette of Rouen built, in the playground, an overgrown plant wall where climb non-toxic plants blooming from June to August (Ref. 1). Students engaged in a six-week educational module prior to planting the wall (Ref. 1). Engineering students from engineering school ESIGELEC assisted in delivering the program which taught students about the importance of plants and respecting the environment (Ref. 1).

The Molenvlietpark is a large park in the Viletzoom area of The Hague which will serve as an ecological corridor and stormwater storage. Beside flowery grasslands, the park has several interconnected ponds serving as water storing facilities that can temporarily collect a large amount of water during heavy rainfall. The green and blue areas with diverse vegetation provide habitat for a large variety of species and a fish spawning ground supporting biodiversity (1,5,6,7). It will also include paths for cyclists and pedestrians. (1) The first phase of the park construction has been completed, while the second phase is planned to be executed in 2021-2022.

The project aims at realizing a large urban park to link the city and the sea coast. It is a project of significant social value, as it takes place in a neighbourhood which has been in a state of decay for 50 years. The intervention includes new facilities for recreation and sport, but first of all new plantations and the creation of rooftop gardens. It would be the second-largest park of the city, by linking the city and the sea. (Ref.1.)

The aim of the project was to extend and cover one of Germany’s busiest highways, the south-north highway (A7). The highway had divided neighborhoods from each other and had had negative environmental effects like noise and air pollution. The new green roof will have three parts that connect the existing green surfaces to each other, these parts constitute the three phases of the construction. The urban areas in the vicinity of the noise-reduced motorway will be developed for residential construction. The project also includes the reconstruction of the Langenfelder Brücke in a way which makes the bridge wider, and also provides better noise protection for locals. (Reference 10) In September 2020, only the first phase has been completed, and the final completion is planned for 2028. (Reference 1, 3, 12).

The first external green wall in the public space in Poland was installed on the surface of a 30 square meters wall of the Infobox building in Gdynia [1,2]. The project serves aesthetic purposes and aims to improve air quality. The wall was composed of the plants suitable for the Polish climate conditions [3].

The project was implemented in the eastern coast of Poland in the Pomeranian Voivodship. A 5.98 km of the current sea coast within the administration of the Maritime Office in Gdynia was secured and fortified until 2015. The purpose of the initiative is to increase the number of marine shore sites restored to a former state by recultivating degraded areas, securing landslides, and securing marine shores from erosion [1].

The project is a part of a larger initiative to revitalize this neglected district of the city and involves redevelopment and expansion of rain drainage system in Gdynia Chylonia. It resulted in the construction of rainwater retention systems and rainwater sewage systems with safe rainwater discharge to the Chylonka River. The aim of the wider initiative is to ensure a more decent standard of living and social cohesion by revitalizing the neglected areas of Gdynia [1,2,4].

Paljassaare peninsula hosts the Paljassaare special conservation area and is partly a nature reserve and partly used to accommodate a wastewater treatment facility (ref 3). The leftovers from the treatment facility, processes of urbanisation and cyanobacteria blooms from the Baltic sea are largely influencing the fragile ecosystem of the peninsula through eutrophication. By this, the different cycles and ecosystems (both natural and urban) got more and more intertwined. ‘Perpetuum Mobile’ project aims to rebalance the urban metabolism of Tallinn city with the ecological processes on the Paljassaare peninsula through natural de-eutrophication of the area (ref 4).

Tondiraba is a green urban area located in Lasnamäe, it is a valuable area with a diverse landscape which at the start of the initiative was severely overgrown and randomly used. The city planned to build an eco-golf course where the diverse and species-rich landscape and protected species are preserved. The architecture of the golf course is based on the advantages of the natural location and an ‘eco-golf course' concept. These landscapes and their flora were generated with landscape maintenance methods, which results in ‘micro-communities’ in which the ecosystems characteristic of the given area would start developing (ref 1, 5).

The main problem of Lake Ülemiste is high phytoplankton biomass, which increases the cost of water treatment (ref 1). Improving the water quality of Lake Ülemiste by biomanipulation has been considered as a management alternative. Lake Ülemiste was bio-remediated after reduction of external loading and the shifts in water quality were studied during the active-phase of the measure. (ref 1). Tallinn obtains 88% of the water it needs from Lake Ülemiste. Pine forest in the sanitary protection zone surrounding Lake Ülemiste offers several ecosystem services that help to improve the quality of the city’s drinking water (ref 4).