399
14.4.2 Development Areas
The aim of the research was to examine the benefits of the different scenarios
compared with alternative urban studies proposing different urban structures and
larger park areas.
The simulations have shown that the block structure offers better day time conditions than the loose urban structure. However further research should explore the
cooling effect of the parks during the night time.
14.4.3 Green Belt
The assessment of the effect of a proposed green belt as a scenario for UHI mitigation in Prague was focused on the issue of modelling of meteorological fields and
air quality in conditions of conurbation with regard to presence of urban heat island
phenomenon.
Within the project framework, modelling tools for air quality evaluation were
tested while meteorological parameters and chemistry of the atmosphere were taken
into account.
In terms of UHI, the most important was evaluation of green belt scenario,
i.e. state when the transport concept and vehicle fleet composition corresponds to
the year 2020 and areas defined as green belt are assumed to be changed into forest
area or forest park.
The method used for modelling of transport of chemical substances required to
include a large territory in which boundary conditions were modelled, influencing
meteorological quantities and concentrations of pollutants within the area of
interest
The project assessed the following scenarios: baseline state, fulfilment of the
land use plan, low-emission zone and implementation of a green belt.
The presented project practically verified the potential use of chemical transport
models for air quality and UHI assessment in a small scale. The fine resolution that
reaches up to 333 m for the innermost domain allows assessing air quality and UHI
effect in cities in detail.
As a result of the recent modelling, the influence of the green belt showed to be
rather small; it affects only few sites by small decrease in temperature and consequent change in concentrations of pollutants caused by a change in biogenic emissions production and by a change in chemical reactions in the atmosphere. Further
simulations with traffic modifications are needed. It should be pointed out, that the
effect of climate change for the year 2020 is negligible compared to the effects by
changes in land-use and transport concepts with vehicle fleet changes.
14 Pilot Actions in European Cities – Prague
14.4.2 Development Areas
The aim of the research was to examine the benefits of the different scenarios
compared with alternative urban studies proposing different urban structures and
larger park areas.
The simulations have shown that the block structure offers better day time conditions than the loose urban structure. However further research should explore the
cooling effect of the parks during the night time.
14.4.3 Green Belt
The assessment of the effect of a proposed green belt as a scenario for UHI mitigation in Prague was focused on the issue of modelling of meteorological fields and
air quality in conditions of conurbation with regard to presence of urban heat island
phenomenon.
Within the project framework, modelling tools for air quality evaluation were
tested while meteorological parameters and chemistry of the atmosphere were taken
into account.
In terms of UHI, the most important was evaluation of green belt scenario,
i.e. state when the transport concept and vehicle fleet composition corresponds to
the year 2020 and areas defined as green belt are assumed to be changed into forest
area or forest park.
The method used for modelling of transport of chemical substances required to
include a large territory in which boundary conditions were modelled, influencing
meteorological quantities and concentrations of pollutants within the area of
interest
The project assessed the following scenarios: baseline state, fulfilment of the
land use plan, low-emission zone and implementation of a green belt.
The presented project practically verified the potential use of chemical transport
models for air quality and UHI assessment in a small scale. The fine resolution that
reaches up to 333 m for the innermost domain allows assessing air quality and UHI
effect in cities in detail.
As a result of the recent modelling, the influence of the green belt showed to be
rather small; it affects only few sites by small decrease in temperature and consequent change in concentrations of pollutants caused by a change in biogenic emissions production and by a change in chemical reactions in the atmosphere. Further
simulations with traffic modifications are needed. It should be pointed out, that the
effect of climate change for the year 2020 is negligible compared to the effects by
changes in land-use and transport concepts with vehicle fleet changes.
14 Pilot Actions in European Cities – Prague