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Thesis document - Jana Milosovicova - Urban Design English

Thesis document - Jana Milosovicova - Urban Design English

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Appendix 1 Climatic effects of various urban land use categories(After Sukopp and Wittig 1998, p. 321-351, amended and completed)Type of landuseDirect impact and effects on climate,as well as the impact on water cycle,soils and vegetation (with consequencesfor climate)PrimaryclimaticfunctionMain CSUD action categories (for newdevelopments). 1Building areas with housing and/or commercial and mixed-use buildingsDensely builtupurban coresHighly influenced ventilation processes(regional winds don’t impinge in theiroriginal extent; however turbulences andstrong local winds possible on the streetlevel – depending on urban form, geometryand density); increased temperaturesdue to the concentration of human activitiesanthropogenic surface characteristicsof built areas; high levels of pollution(SO 2, dust). Almost total rate of soil sealing,very low vegetation to built structuresratio, very low evapotranspiration rate,almost all rainwater flows into sewerage.ImpactareaAim at mixed-use; keep the buildingdimensions down to the necessary extent;create small-scale open spaces for enhancinglocal ventilation conditions between thebuildings; create openings in buildings andbuilding blocks for the purpose of ventilation;green the roofs and façades to alleviatethe anthropogenic heat exhausts; usepermeable pavements, implement waterbasins, collect rainwater in water basinsan cisterns (on buildings if no space on thestreet level) and re-use it for green roofsand façade irrigation, for adiabatic cooling,for use in buildings.Closed urbanblock developmentsHighly influenced ventilation processes(mostly negatively, due to the closedblock structure), high temperatures, highlevels of pollution (SO 2, dust). Very highrate of soil sealing, low vegetation to builtstructures ratio, low evapotranspirationrate, high rate of rainwater flows intosewerage.ImpactareaCreate small-scale open spaces forenhancing local ventilation conditionsbetween the buildings; create openings inbuildings and building blocks for the purposeof ventilation; green the courtyardsand use permeable pavements; green theroofs and façades to alleviate the anthropogenicheat exhausts; collect rainwaterin water basins and cisterns (on buildingsif no space on the street level) and re-useit for green roofs and façade irrigation, foradiabatic cooling, for use in buildings.Exclusive residentialareas(villa quarters)If well greened-through, favourable microclimate,however lower population densityand thus likely to take over more landthan a denser urban form, with negativeconsequences for climate; to some extentretention of air pollutants, no significanttemperature increase due to greenery andsufficient ventilation. Variable rate of soilsealing; a balanced vegetation to builtstructures ratio and thus higher evaporationrate; considerable amount of rainwaterflows into sewerage unless collectedfor garden irrigation.Climateneutraleffect/ImpactareaGreen the courtyards and use permeablepaving; green the roofs and façades; implementwater bodies, collect rainwater inwater basins and re-use it for green roofsand façade irrigation, for adiabatic cooling,for use in buildings.Row houseresidentialareas withvast greenseparatorsThe greenery has mostly an undefinedopen space function, enabling windpenetration into the settlement – ventilationprovides microclimatically positiveenvironments; to some extent retention ofair pollutants.Climateneutraleffect/ImpactareaGreen the spaces between buildings and,where paving unavoidable, use permeablepaving; green the roofs and façades;implement water bodies; collect rainwaterand re-use it for green roofs and façadeirrigation, for adiabatic cooling, for use inbuildings.Appendices77

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