Management-Oriented Upgrade and Construction of Urban Green Space Management System in Wuxi

With the widespread application of Geographic Information System (GIS) technology in urban green space management system, the refinement of greening management puts forward the demand for upgrading the system. Taking the construction of urban green space management system in Wuxi as an example, this paper reverses the conventional operation of building database before system, and puts forward the method of management-oriented system upgrading. Through the research on the status quo of urban greening management, starting from the analysis of management requirements, the management requirements are transformed into system design requirements, so that the system upgrade is guided by the urban greening management requirements. It solves the problems of large amount of and time-consuming data input during the upgrading and construction of the system, which leads to long process and data lag when it is put into use. After the rapid upgrade, along with the refinement of daily management, the system has been continuously improved, and has received good results in the depth and breadth of data.

The Decline, Fall, and Rise of a Large Urban Colonising Bird

ContextThe process of urbanisation results in dramatic landscape changes with long-lasting and sometimes irreversible consequences for the biota. Urban sensitive species can be eliminated from the landscape, while urban tolerant species can persist in or colonise the changed environment. ObjectivesHere we used historical atlas data to examine the changing distribution of the Australian Brush-turkey, a recent urban colonising species, at continental and city scales, and the changing land use in urban areas occupied by the species. MethodsWe assessed changes at the continental scale from 1839-2019. We then assessed colonisation of the cities of Sydney and Brisbane, located 900 km apart, over the period 1960-2019. At the city scale, we quantified the changing land use within Brush-turkey occupied areas over time using classification of satellite imagery. ResultsThe Brush-turkey range has shifted over the last century, with the species receding from the western and southwestern proportions of their range, while expanding in the northwest. Areas occupied in both cities have expanded, with recently colonised areas containing less vegetation and more developed land. ConclusionsOur results confirm that Brush-turkeys are successfully colonising urban areas, including major cities, and are likely to continue moving into urban areas, despite declines elsewhere in their natural range. This study highlights that species which were locally extirpated from urban areas and thought to be an unlikely candidate for recolonisation can adapt to human modified habitats; successful expansion is likely to be associated with urban greening and legal protection from human persecution.

The impact of urban policy scenarios on local climate: a multi-model intercomparison

<p>Understanding the impact of urban environments on the local climate has been a crucial topic in recent years. Changes in the cities structure are expected due to the ongoing urbanization trends and climate-aware mitigation planning. These policy implementations are expected to affect the local urban surface and its interaction with the climate system. Here, we are interested in investigating these impacts coupled to a heatwave condition, due to its adverse impact on human health. </p> <p>In the presented work, we investigate the multi-model response to different urbanization and urban greening scenarios. We employ two NWP models at the 2.1 km convection-permitting resolution: ICON-LAM (ICOsahedral Nonhydrostatic Model in Limited Area Mode)  and WRF-ARW (Weather Research and Forecasting Model). Our one-month experiments comprise the 2019 ``record-breaking'' heatwave in Western Europe and they are all a downscaling of ICON-EU (6.5km resolution).</p> <p>The urban policy scenarios are built from the CORINE land use dataset and they include two urbanization and two urban greening settings, for each model. Urbanization is represented as a sprawl of the main urban areas within the domain towards the natural surrounding areas. To increase the urban green fraction within the main cities, we increase the number of green areas within each city.</p> <p>Our analysis shows the multi-model comparison of the effects of the mentioned urban policies on the urban heat island (UHI) under heatwave conditions. Further, we quantify the effects of urban greening as an efficient tool to mitigate expected climate impacts in terms of the Discomfort Index, and not just for the UHI.<br />Further, we evaluate the similarities and dissimilarities between the two models in terms of multiple correlation decomposition accordingly to Glowienka-Hense et al. 2020.</p>

Regenerative Green Infrastructure Governance in Weak, Rebounding, and Wealthy Land Markets

Too often scholars valorize green infrastructure without critically examining the dynamic and multi-faceted ways that greening impacts urban environments. Cities are complex, evolving forces of their own, which grow and shrink according to time and place. Governance strategies in different economic conditions powerfully shape the impacts of specific green infrastructure installations. They determine the value, quality, quantity, and spatial arrangement of green infrastructure. However, most scholarship focuses on the psychological, social, economic, and environmental benefits of urban greening. Green infrastructure is overwhelmingly studied as apart from historical urban governance trajectories, and it largely fails to consider the role of greening within the process of urban regeneration. This disconnect constitutes a significant gap that constrains understanding of green infrastructure for regenerative cities, and it limits our ability to strategically deploy it in beneficial rather than harmful or irrelevant ways. In this article, I argue that green infrastructure lays fundamentally different roles in poor and wealthy parts of cities, and that these roles change as the overall rank and status of the cities change over time. These changing meanings cause city governments to treat green infrastructure as fundamentally different targets of management. These conclusions are based on an ethnography of the public policy processes surrounding urban greening in three cities with different land markets. In the strong land market, the emphasis is placed firmly on revenue-generating projects, and the major players are private firms in conjunction with city departments. Greening is conceived as a byproduct of large-scale development projects, and rarely apart from them. In the weak land market city, in contrast, the environmental and civic organizations play major roles, and they conceive of green infrastructure apart from development projects. Weak land markets seem to create the possibility for increased political participation of environmental actors and for the installation of green infrastructure for the primary purpose of community health and well-being. However, the increased strength of environmental civic coalitions appears negatively correlated with the city's economic capacity to fund greening projects without support from the business community. These dynamics suggest a counter-cyclical relationship between the political will for urban greening and the investment capacity to pay for it. The analysis of green infrastructure in different land markets demonstrates that green infrastructure is deeply embedded in the historical and geographical legacies of cities.

Socio-Ecological Conflicts in a Global South Metropolis: Opportunities and Threats of a Potential Greenway in the São Paulo Metropolitan Region

Greenways are a measure of environmental remediation within a broad framework aimed at promoting urban greening and adaptation to climate change. The typical characteristics of large urban agglomerations, including land use (such as commercial, industrial, and residential areas) with few public spaces and fragmented landscapes, make it difficult to apply these solutions to the urban fabric, forcing decision-makers and planners to act in informal settlements, highways, and industrial parks. One proposed area is an enclave with unused or underutilized lots, where fragments of the Atlantic Forest, parks, landfills, and rapidly expanding informal settlements can be found. This manuscript examines the socioeconomic and environmental processes that shaped this potential urban greenway between Santo André, Mauá, and Ribeirão Pires, which are part of the São Paulo Metropolitan Region (SPRM), the largest in South America. A survey was conducted based on municipal and regional plans, the environmental and urban laws of Brazil, and the socioeconomic history of this part of the SPRM. In addition, satellite images were used to analyze land use evolution through geotechnologies. Finally, we prepared land use recommendations, considering opportunities and threats, highlighting the possibilities of protection and expansion of the Atlantic Forest. To this end, we examined the literature on environmental urban planning and design, green infrastructure, and other concepts. This study intends to stimulate researchers, planners, and decision-makers regarding the urban greening process in the Global South. According to the recommendations, this stimulus would develop these concepts according to the real situation of the region, which would combine the protection of wild habitats and urban environmental amenities. However, this effort makes no sense if one of the defining Global South characteristics not addressed is social inequality. Therefore, we recommend that an effort be made to develop and incorporate processes from urban greening in slum upgrading.

Evaluating urban greening scenarios for urban heat mitigation: a spatially explicit approach

Urban green infrastructure, especially trees, are widely regarded as one of the most effective ways to reduce urban temperatures in heatwaves and alleviate the adverse impacts of extreme heat events on human health and well-being. Nevertheless, urban planners and decision-makers are still lacking methods and tools to spatially evaluate the cooling effects of urban green spaces and exploit them to assess greening strategies at the urban agglomeration scale. This article introduces a novel spatially explicit approach to simulate urban greening scenarios by increasing the tree canopy cover in the existing urban fabric and evaluating their heat mitigation potential. The latter is achieved by applying the InVEST urban cooling model to the synthetic land use/land cover maps generated for the greening scenarios. A case study in the urban agglomeration of Lausanne, Switzerland, illustrates the development of tree canopy scenarios following distinct spatial distribution strategies. The spatial pattern of the tree canopy strongly influences the human exposure to the highest temperatures, and small increases in the abundance of tree canopy cover with the appropriate spatial configuration can have major impacts on human health and well-being. The proposed approach supports urban planning and the design of nature-based solutions to enhance climate resilience.

Assessing the ecological impact of urban greening: A case study of roadside planting in Wellington, New Zealand

<p>Roadside reserves in Wellington, New Zealand have been the target of a government-led, community-implemented urban greening initiative for the past 25 years. Prior studies of urban greening have shown numerous benefits to neighbourhoods and communities through increased engagement and stewardship, yet there remains a need for research into the ecological effects these programmes have on individual urban landscapes. This research conducted site surveys to determine the variation in ecological functioning and biodiversity within 36 reserves involved in the Wellington Free Plants Programme (FPP). These measures were compared to historical planting data for each site retrieved from council records. Candidate models were constructed based on novel and classical ecological theory, which sought to explain observed variation between physical and ecological measures across study sites and the relationship between these variables and biodiversity. Sites were small with an area ranging from 5.9m² to 246.5m² (mean = 37.8 ±49.5m²), and biodiversity levels (assessed using a Shannon-Weiner Index) ranged from 0.1 to 2.9 (mean = 2.1 ±0.7). The top performing candidate models to predict biodiversity included area, shape, and seedbank density. An examination of the effect of varying urban greening efforts across these sites utilised a multivariate analysis which included measures of ecological functioning, biodiversity, the number of years a site had been planted, and the number of individual plants provided over those years. A significant negative relationship was found between site disturbance and the number of planting years (F33.1 = 4.092, p = .051) while a somewhat significant positive relationship was found between biodiversity and the number of individual plants provided (F33,1 =3.536 , p = .069). These results indicate that current urban greening efforts contribute to the ecological health of roadside reserves and that the patterns and processes governing the biological composition of these reserves may be partially explained with traditional ecological theory.</p>

Assessing the ecological impact of urban greening: A case study of roadside planting in Wellington, New Zealand

<p>Roadside reserves in Wellington, New Zealand have been the target of a government-led, community-implemented urban greening initiative for the past 25 years. Prior studies of urban greening have shown numerous benefits to neighbourhoods and communities through increased engagement and stewardship, yet there remains a need for research into the ecological effects these programmes have on individual urban landscapes. This research conducted site surveys to determine the variation in ecological functioning and biodiversity within 36 reserves involved in the Wellington Free Plants Programme (FPP). These measures were compared to historical planting data for each site retrieved from council records. Candidate models were constructed based on novel and classical ecological theory, which sought to explain observed variation between physical and ecological measures across study sites and the relationship between these variables and biodiversity. Sites were small with an area ranging from 5.9m² to 246.5m² (mean = 37.8 ±49.5m²), and biodiversity levels (assessed using a Shannon-Weiner Index) ranged from 0.1 to 2.9 (mean = 2.1 ±0.7). The top performing candidate models to predict biodiversity included area, shape, and seedbank density. An examination of the effect of varying urban greening efforts across these sites utilised a multivariate analysis which included measures of ecological functioning, biodiversity, the number of years a site had been planted, and the number of individual plants provided over those years. A significant negative relationship was found between site disturbance and the number of planting years (F33.1 = 4.092, p = .051) while a somewhat significant positive relationship was found between biodiversity and the number of individual plants provided (F33,1 =3.536 , p = .069). These results indicate that current urban greening efforts contribute to the ecological health of roadside reserves and that the patterns and processes governing the biological composition of these reserves may be partially explained with traditional ecological theory.</p>