Wojciech Skórzewski

The application of the same global legal regulations to areas with different climates, landscapes, and cultural and urban conditions may ultimately lead to decisions that are unsuitable for the region, which could result in poor investment and development decisions for the municipality. This article examines how sustainability regulations established locally, in response to local conditions, differ from global regulations created without considering the differences between the areas to which they apply. Selected criteria were assessed in relation to global and local regulations, and then, based on these criteria and their weights, rankings of the strengths and weaknesses of municipalities were proposed in relation to the selected criteria, the weights of which were evaluated depending on the adopted global or local regulations. The AHP method was used to conduct this multi-criteria assessment, based both on expert group opinions and artificial intelligence tools. The aim of this analysis was to demonstrate differences in the hierarchies of sustainable development aspects implemented globally and locally, as well as local conditions. The assessment results indicate discrepancies between expert knowledge, which takes into account local conditions, and the priorities resulting from general legal regulations. Some areas important from a local perspective, such as building density or mixed-use development, are insufficiently addressed in legal regulations, both under Polish and EU law and local law. This also contradicts current trends in urban planning theory, which advocates a shift away from zoning. Others, such as energy efficiency in buildings and renewable energy sources, are strongly present in both national and EU law but are not implemented in local regulations.

The increasing frequency of extreme weather events, combined with the historic degradation of urban water systems, has prompted cities worldwide to reconsider the role of water in urban planning. This study examines the restoration and integration of historical watercourses into contemporary urban environments through blue and green infrastructure (BGI). Focusing on three case study cities—Poznań (Poland), Milan (Italy), and Beijing (China)—this research explores both spatial and regulatory conditions for reintroducing surface water into cityscapes. Utilizing historical maps, contemporary land use data, and spatial planning documents, this study applies a GIS-based multi-criteria decision analysis (GIS-MCDA) to assess restoration potential. The selected case studies, including the redesign of Park Rataje in Poznań, canal daylighting projects in Milan, and the multifunctional design of Beijing’s Olympic Forest Park, illustrate diverse approaches to ecological revitalization. The findings emphasize that restoring or recreating urban water systems can enhance urban resilience, ecological connectivity, and the quality of public space.

This article discusses the impact of urban layout on the energy performance of residential buildings. A comparative analysis of multiple variants of land development differing in building layout only, with all other features being the same, including the building envelope properties and technical equipment, was carried out. The research was conducted in two selected locations in Poznań metropolitan area (Poland), which is located in the Dfb climate zone (humid continental—warm summer subtype). For each location, the following variants of building layout were considered: parallel buildings (12 variants with an orientation towards the sides of the world rotated in steps of 15 degrees), perimeter frontage buildings, and comb-shaped buildings with semi-open courtyards (4 variants with courtyards open to each side of the world). The calculation of annual end uses for heating and cooling was conducted as well as the peak values. All calculations were performed using OpenStudio Application Release v. 1.2.1 software with the SketchUp plugin. The results showed that the proper arrangement of buildings on the urban plot may result in significant energy savings. The considered variants differed in terms of annual end uses for heating and cooling even by approx. 15%, and the peak values on the hottest days were 4–10 times lower in comparison with the least advantageous variants. The results show the slight advantage of compact development over free-standing development in terms of total end uses as well as the south and north orientation of facades over the east and west in terms of peak solar heat gain values.

Local spatial development plans, are one of the most important urban landscaping tools. Their goal is, on the one hand, to protect urban space including, inter alia, prevention of creation of illconsidered developments, that are bad to the urban landscape, the environment or the local communities. For this purpose, there is a number of restrictions introduced into local spatial development plans. On the other hand, the role of local plans is also creating the space, so they should be conducive to projects with high-quality architecture, that are often unconventional and innovative, adding new value to the architectural landscape of the city, which could be blocked by too strict regulations. The trick is to create regulations in a way that can help reconcile that two goals.

The issue of overheating the buildings gives great opportunities for the use of greenery, that can affect the amount of passive solar gains through the glazed parts of façades. Restricting the access of the sunlight to the façades helps to reduce the energy usage for the cooling purposes, but, on the other hand, may cause reduction of solar gains in winter. The aim of the research is to determine the potential of using greenery to reduce energy demand of buildings by achieving the optimal balance between solar energy gains and losses in polish climate conditions.