Editorial: Urban runoff of pollutants and their treatment
Abstract
Editorial on the Research Topic Urban runoff of pollutants and their treatmentFloods are one of the most common natural disasters worldwide.Their increasing incidence in the past years is mainly due to the consequences of climate change coupled with a general trend of the increase of surface impermeabilization in the cities.In particular, the past years' rapid urbanization and human land use originated environment modification, with consequent surface modification: in the urban area, most of the surface is covered by buildings and impermeable pavements, which strongly limits snowmelt and rainwater infiltration into the subsurface.However, floods are sometimes predictable events (Enríquez et al., 2022).To account for the vulnerability of a territory, due to extreme events, patterns of development coupled with demographic studies are considered.As a result, the score of flood risk is available as a risk index, evaluated by a dedicated committee of the European (European Commission, 2022).The 2022 flood risk is shown in Figure 1.It appears that only a few countries have a relatively low risk (less than 5), and Vietnam and Bangladesh are the countries with the higher flood risk (the index score is 10).Urban runoff is water deriving from rain and outdoor water usage, comprising stormwater and snowmelt, which drains from roofs, roads, car parks sidewalks, driveways, and other surfaces, and does not soak into the ground.It is widely recognised as a major carrier for the pollutants…
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