Abstract
Over the past 20 years, a large number of studies have been published on reducing storm runoff by various types of green roofs. This article analyzes the results of experimental studies presented in 39 publications on green roof runoff reduction in a climate similar to the climate of Russia: in Canada, the USA, Finland, Norway, France. An analytical review found that the ability of green roofs to retain rainfall varies from 20 to 99.5% depending on climatic conditions (duration and intensity of rains, duration of dry periods, solar radiation, temperature and humidity, wind conditions), the properties of green roof layers (moisture capacity of the substrate and a drainage layer, the substrate thickness), the type of vegetation, the geometry of a green roof (slope and orientation). Green roofs can be a useful tool for reducing urban storm water runoff. However, in order to ensure high efficiency, it is necessary to use green roof technology with other measures to reduce runoff.
Highlights
The process of urbanization leads to an increase in artificial impermeable surfaces in cities: roofs and roadways, thereby disrupting the natural hydrological cycle
Wear of sewer systems in most cities of Russia is extremely high, this is due to the discrepancy between the performance of the sewer systems, the vast majority of which were created at the end of the XX century, and the loads during intense rains
It was found that the green roofs stormwater retention rate varies from 20 to 99.5% for the selected countries
Summary
The process of urbanization leads to an increase in artificial impermeable surfaces in cities: roofs and roadways, thereby disrupting the natural hydrological cycle. Wear of sewer systems in most cities of Russia is extremely high, this is due to the discrepancy between the performance of the sewer systems, the vast majority of which were created at the end of the XX century, and the loads during intense rains (e.g., wear of sewer systems in Irkutsk - 48% [3]; Kaliningrad-20-100% [4]). It is necessary to carry out measures for effective management of rain and meltwater in areas with overloaded sewer systems. To solve this problem, in addition to the reorganization of worn-out engineering
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