The project will propose water retention and bioretentive, nature-friendly measures – infiltration systems to capture rainwater and replenish greenery resistant to climate change. These measures will be implemented in the public area of the Kaskady in the Municipality Bratislava – Karlova Ves in Dlhé Diely housing estate, which is one of the most vulnerable parts of the Municipality Bratislava-Karlova Ves from the point of view of climate change.
This area is mainly visited by families with children and the elderly. The activity is focused on model adaptation measures with the help of green infrastructure to solve problems associated with the negative effects of climate change – alternating periods of extreme drought with heavy torrential rains. For the first time (not only in Bratislava, but throughout Slovakia) we are testing a comprehensive approach, because we have developed a precipitation model of runoff routes and a dynamic simulation of the extent of floods, water depth and flow rates in Karlovy Vary. In accordance with this model, we chose the public space of the Kaskady, where the model shows great potential for the implementation of water retention measures (over 35 cm of rainwater in modeled precipitation of 31 mm / 30 min).
For this reason, several retention tanks and seepage beds will be built, integrated into the existing surrounding green space, which will be planted with various ornamental and at the same time resistant plants, which will improve the visual appearance of the park, improve the microclimate and provide support for biodiversity. The proposed measures provide for the irrigation of trees and shrubs with automatic drip irrigation with trapped rainwater from underground reservoirs and with jet irrigation of lawns. In addition, 21 trees and trusses will be planted in the area to help cool the site and reduce CO₂ emissions.
Project activity indicators: reduction of emissions by 59.66 tCO₂ per life from 21 planted trees. Calculation: Robinia pseudoaccacia ´Umbraculifera´ – 45 years 1.45 t CO₂ / tree, Acer platanoides ´Crimson King´ – 45 years 1.02 t CO₂ / tree, Platanus occidentalis – 60 years 4.5 t CO₂ / tree.