engleski

Protection of Zagreb Zoo from Road and Railway Traffic Noise

Due to an increased number of vehicles and increased traffic intensity in urban areas, transportation noise is a growing issue of many cities. The paper elaborates a comprehensive procedure for implementation of noise protection measures (measuring, calculation, protection) of the Zagreb Zoo. The Zoo is located close to a road exceptionally burdened with road and tramway traffic. The measurements of the traffic noise levels were carried out within the Zoo grounds and on the outer side of its fence immediately next to the road. The measured levels of noise and carefully analysed traffic flows were used for verification of the acoustic calculation, elaboration of the noise propagation model, and production of noise maps for the existing noise levels. After the verification of the model, production of noise maps of the future state - with implemented protection measures - was approached. During design and optimization process the influence of the position, length, height and type of the walls and surrounding vegetation on noise reduction has been simulated using precise computer models. The fact that the protected area is a monument of park architecture and a protected cultural good has also been taken into account. The combination of noise protection walls and carefully positioned vegetation led to an optimal solution from the aspect of noise reduction, construction procedure, functionality as well as the architectural design suitable for such an institution.

Zagreb ZOO; noise protection; concrete bariers; noise maps

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