Search

Copyright of Raumforschung und Raumordnung is the property of Oekom Verlag GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Raumforschung und Raumordnung is the property of Oekom Verlag GmbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article aims to analyse the development and use of allotment gardens (AGs) and plots in Westphalia and Lippe (Germany) and Wielkopolska (Poland) to assess what functions are feasible in their current stage, thus, contributing to an ongoing discussion on the role of AGs in contemporary urban space. The analysis considered ecosystem services, green infrastructure and urban agriculture. Characteristic features of AGs were identified by means of a survey of plot-holders, in-depth interviews with representatives of allotment associations, and exploratory walks. The management and use of AGs differs in both regions in terms of accessibility, common areas, impact on the landscape and plots development. AGs in Westphalia and Lippe are accessible and developed in a way which meets needs of external users. They fit harmoniously into the surrounding landscape. However, AGs in Wielkopolska are not as accessible, prioritise internal users, and do not always blend in with their surroundings. In Westphalia and Lippe, in addition to recreational and edible plant-growing plots, there are also educational and integration ones, while in Wielkopolska main categories of plots were more numerous and varied; from recreational with a predominance of ornamental plants to fully-cultivated. However, the considerable freedom that Polish plot-holders enjoy gives rise to the gradual marginalisation of edible-plant growing. [ABSTRACT FROM AUTHOR]

By 2050, two-third of the world's population will live in cities. In this study, we develop a framework for analyzing urban growth-related imperviousness in North Rhine-Westphalia (NRW) from the 1980s to date using Landsat data. For the baseline 2017-time step, official geodata was extracted to generate labelled data for ten classes, including three classes representing low, middle, and high level of imperviousness. We used the output of the 2017 classification and information based on radiometric bi-temporal change detection for retrospective classification. Besides spectral bands, we calculated several indices and various temporal composites, which were used as an input for Random Forest classification. The results provide information on three imperviousness classes with accuracies exceeding 75%. According to our results, the imperviousness areas grew continuously from 1985 to 2017, with a high imperviousness area growth of more than 167,000 ha, comprising around 30% increase. The information on the expansion of urban areas was integrated with population dynamics data to estimate the progress towards SDG 11. With the intensity analysis and the integration of population data, the spatial heterogeneity of urban expansion and population growth was analysed, showing that the urban expansion rates considerably excelled population growth rates in some regions in NRW. The study highlights the applicability of earth observation data for accurately quantifying spatio-temporal urban dynamics for sustainable urbanization and targeted planning. [ABSTRACT FROM AUTHOR]