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The influence of façade colour, glazing area and geometric configuration of urban canyon on the spectral characteristics of daylight
Nataša Šprah, Jaka Potočnik, Mitja Košir, 2024, original scientific article

Abstract: Since the non-image-forming (NIF) effect of daylight on the human circadian system is widely accepted, adequate exposure to daylight is now considered one of the elements of a healthy life. In urban environment, one of the prerequisites for adequately lit indoor spaces is the amount and quality of daylight reaching the window, which is highly dependent on the characteristics of the urban environment. The aim of the study was to determine whether there are correlations between urban density (i.e., distance between buildings, building height), façade surface characteristics (i.e., colour and Window-to-Wall Ratios – WWR) and NIF potential of daylight. The study was conducted on a parametric geometric model of a street canyon covering a wide range of characteristics. Simulation results were interpreted using the Relative Melanopic Efficacy coefficient and Sky View Factor. The results indicate that the colour of the opposite façade can substantially impact the resulting NIF potential, especially for orange-red or blue hues. The results of the study show that this influence for building heights between 3 and 8 storeys becomes significant when the width of the urban canyon is less than 25 m and becomes substantially smaller at WWRs above 30 %.
Keywords: urban planning, daylight, non-image forming effects of light, circadian light, urban canyon, façade colour
Published in DKUM: 19.01.2024; Views: 315; Downloads: 13
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Daylight provision requirements according to EN 17037 as a restriction for sustainable urban planning of residential developments
Nataša Šprah, Mitja Košir, 2020, original scientific article

Abstract: The attempt at a more sustainable land use by increasing urban density may have a negative effect on the daylighting of residential buildings. In densely built areas, obstructions generated by the surrounding buildings can substantially reduce the available amount of daylight, causing poorly daylit spaces and a less healthy indoor environment with higher electricity consumption as a consequence of artificial lighting. European standard EN 17037, Daylight in Buildings, was established in 2018 to ensure appropriately daylit spaces. In this paper, a three-step methodology was developed to investigate the relationship between certain urban planning parameters and the daylighting of a typical room defined by specific (Slovenian) legislative restrictions about its geometry and minimum required window to floor area ratio, in order to establish the maximum densities of residential developments still fulfilling the minimum requirements for daylight provision defined by EN 17037. The results show that a relatively low urban density is required to fulfil the stipulations for minimum daylight provision for the deepest permissible room according to the Slovenian legislation. The impact of the development floor area ratio on the daylighting potential of buildings was identified as significant, followed by the site coverage, development layout, and building typology. Furthermore, the developed methodological approach clearly demonstrates a substantial potential for application in urban planning, with indoor daylight environmental conditions being linked to the planning of residential developments in the earliest stages of the project.
Keywords: sustainable urban planning, daylighting, vertical daylight factor, residential developments, solar potential
Published in DKUM: 14.07.2023; Views: 432; Downloads: 43
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The significance of regional planning
Andrej Černe, 2008, review article

Abstract: The article is a short summary of lectures at the 1st International Summer School GEOREGNET held at Faculty of Arts, University of Maribor in Maribor 23 September, 2008. The aim of the lecture was to discuss some of the basic dilemmas about the role of regional planning in a contemporary society within the context of market economy.
Keywords: regional planning, urban planning, regional development
Published in DKUM: 13.03.2018; Views: 1048; Downloads: 109
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Designing a strategic mobility plan for small and medium sized cities using a multi-stage methodology : case of Celje
Uroš Kramar, Tina Cvahte Ojsteršek, Marjan Sternad, Darja Topolšek, 2015, original scientific article

Abstract: Urban mobility is one of the crucial factors of quality of life in cities. Therefore, an effective mobility system and its holistic planning are of utmost importance for sustainable and quality development of urban centres. This paper focuses on holistic and integrated strategic planning of a mobility system. The used multi % step methodology was tested on a case of a city of Celje, Slovenia. With the first round of focus groups, information about the specific urban mobility system was gathered which was used to develop a SWOT matrix. This was the foundation for the execution of a second round of focus groups, where the output was a proposition for a strategic plan for mobility development in small and medium sized cities.
Keywords: urban mobility, strategy, planning, multi-stage methodology
Published in DKUM: 03.08.2017; Views: 1269; Downloads: 163
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