Although urban green infrastructure [UGI] is increasingly characterized as an asset because it simultaneously serves critical social and environmental functions, few planning tools or research approaches exist where multiple functions are integrated into a systemic spatial analysis. Accordingly, this report examines the utility of ergonomics as a methodological approach to integrate the natural and social sciences and forge a deeper understanding of UGI multifunctionality. Five administrative districts in Dresden [Germany] were selected as a study area to carry out this analysis. Mixed methods were used to categorize and measure various social and environmental functions of UGI cases, and outcomes analyzed for spatial clustering in GIS. Results from this study provide strong evidence that combining social and environmental variables can significantly inform the way UGI networks are perceived and valued. / text

As the planet rapidly urbanizes and demand for locally-produced ecosystem services grows, the effective management of urban green infrastructure is increasingly important. A number of digital tools have recently been developed and released that share information and incite citizen participation in the governance, management and planning of urban green infrastructure. In this paper, I analyse six different e-tools within the context of New York City with a focus on the types of knowledge they share and the forms of participation they incite in relation to urban green infrastructure. I explore how e-tool knowledge exchange and participation relate to civic stewardship of urban green spaces, as stewards play a significant role in the local production of urban ecosystem services. The findings indicate that most e-tools are designed to share a large amount of data describing social-ecological systems. In many cases, the tool developers hope that through gaining knowledge about the system, users will develop an ethical consideration for the environmental resource and even take action as environmental stewards. Additionally, while many of the e-tools present complex, exploratory digital learning environments, many also combine virtual experiences with in-person trainings, workshops and coaching. These hybrid approaches harness the power of digital platforms to organize diverse social networks and share large amounts of data while employing more traditional on-the-ground organizing techniques and offer a way forward in an age of increasing dominance of digital data. Further research on these types of hybrid digital approaches is warranted. Future research on e-tool usership and connections to stewardship outcomes could enrich the understanding of how e-tools operate as well as their social-ecological potential and impact.

Cities are growing at unprecedented rates and are expected to be home to 70% of the world’s population in 2050. In this process, they face challenges such as densification, rapid population growth and loss of land and ecosystem services. Cities also have to remain livable and accessible to all. In 2014, the Swedish Public Health Agency declared that it would aim to close all avoidable health inequalities within one generation. In order to reach these objectives while also complying with the Sustainable Development Goals, urban green infrastructure (UGI) has been increasingly viewed as a powerful instrument that cities can utilize to help them meet their sustainability and human health targets. As nature-based solutions, UGI can greatly contribute to building resilience in urban areas by providing a number of ecosystem services. Simultaneously, UGI have also been shown to possess equigenic functions – the capacity to support the health of the least advantaged population groups equally or more so than the most privileged. This study has therefore aimed to operationalize a methodology to help identify optimal locations for developing and managing UGI in Stockholm with the aim of prioritizing health and minimizing impacts on existing ecosystems. This was done by drawing on 3 spatial datasets (land-cover, health and healthcare consumption, socioeconomics) and combining them using a GIS. The resulting maps are made for individual as well as aggregated health indicators. They display multiple optimal location clusters that were often located in the outer parts of the city, notably in the north-western and south-eastern boroughs. The inner-city however, showed little need for equigenic UGI improvements. The results and the implications of this methodology are discussed in relation to several aspects of UGI, including quality, quantity and accessibility, gentrification and UGI’s role in the smart city. Suggestions for future research building on this methodology are also provided.

abstract: The combination of rapid urban growth and climate change places stringent constraints on multisector sustainability of cities. Green infrastructure provides a great potential for mitigating anthropogenic-induced urban environmental problems; nevertheless, studies at city and regional scales are inhibited by the deficiency in modelling the complex transport coupled water and energy inside urban canopies. This dissertation is devoted to incorporating hydrological processes and urban green infrastructure into an integrated atmosphere-urban modelling system, with the goal to improve the reliability and predictability of existing numerical tools. Based on the enhanced numerical tool, the effects of urban green infrastructure on environmental sustainability of cities are examined. Findings indicate that the deployment of green roofs will cool the urban environment in daytime and warm it at night, via evapotranspiration and soil insulation. At the annual scale, green roofs are effective in decreasing building energy demands for both summer cooling and winter heating. For cities in arid and semiarid environments, an optimal trade-off between water and energy resources can be achieved via innovative design of smart urban irrigation schemes, enabled by meticulous analysis of the water-energy nexus. Using water-saving plants alleviates water shortage induced by population growth, but comes at the price of an exacerbated urban thermal environment. Realizing the potential water buffering capacity of urban green infrastructure is crucial for the long-term water sustainability and subsequently multisector sustainability of cities. Environmental performance of urban green infrastructure is determined by land-atmosphere interactions, geographic and meteorological conditions, and hence it is recommended that analysis should be conducted on a city-by-city basis before actual implementation of green infrastructure. / Dissertation/Thesis / Doctoral Dissertation Civil and Environmental Engineering 2016

abstract: The world has been continuously urbanized and is currently accommodating more than half of the human population. Despite that cities cover only less than 3% of the Earth’s land surface area, they emerged as hotspots of anthropogenic activities. The drastic land use changes, complex three-dimensional urban terrain, and anthropogenic heat emissions alter the transport of mass, heat, and momentum, especially within the urban canopy layer. As a result, cities are confronting numerous environmental challenges such as exacerbated heat stress, frequent air pollution episodes, degraded water quality, increased energy consumption and water use, etc. Green infrastructure, in particular, the use of trees, has been proved as an effective means to improve urban environmental quality in existing research. However, quantitative evaluations of the efficacy of urban trees in regulating air quality and thermal environment are impeded by the limited temporal and spatial scales in field measurements and the deficiency in numerical models. This dissertation aims to advance the simulation of realistic functions of urban trees in both microscale and mesoscale numerical models, and to systematically evaluate the cooling capacity of urban trees under thermal extremes. A coupled large-eddy simulation–Lagrangian stochastic modeling framework is developed for the complex urban environment and is used to evaluate the impact of urban trees on traffic-emitted pollutants. Results show that the model is robust for capturing the dispersion of urban air pollutants and how strategically implemented urban trees can reduce vehicle-emitted pollution. To evaluate the impact of urban trees on the thermal environment, the radiative shading effect of trees are incorporated into the integrated Weather Research and Forecasting model. The mesoscale model is used to simulate shade trees over the contiguous United States, suggesting how the efficacy of urban trees depends on geographical and climatic conditions. The cooling capacity of urban trees and its response to thermal extremes are then quantified for major metropolitans in the United States based on remotely sensed data. It is found the nonlinear temperature dependence of the cooling capacity remarkably resembles the thermodynamic liquid-water–vapor equilibrium. The findings in this dissertation are informative to evaluating and implementing urban trees, and green infrastructure in large, as an important urban planning strategy to cope with emergent global environmental changes. / Dissertation/Thesis / Doctoral Dissertation Civil, Environmental and Sustainable Engineering 2019

En milieu urbain, la concurrence entre les enjeux de préservation de la biodiversité et de la densification du territoire est particulièrement développée. Dans une optique d’aide à la décision, une meilleure connaissance des zones les plus conflictuelles est requise. Face au constat d’insuffisance et d’inadéquation des données et des méthodes nécessaires à la cartographie des Trames vertes urbaines, notre travail s’intègre en premier lieu dans une démarche technique. Celle-ci est centrée sur la mise en place d’une méthode de traitement d’images satellitaires Très Haute Résolution Spatiale Pléiades (THRS) pour l’extraction de la végétation arborée et herbacée à l’échelle fine d’une emprise urbaine. D’abord appliquée à des données fictives, cette méthode est ensuite déployée sur quatre territoires (Toulouse, Muret, Pierrefite-Nestalas et Strasbourg). Bien que fondée sur une approche pixel, la simplicité de la méthode, qui s’appuie sur des outils libres, et les résultats obtenus (indice Kappa supérieur à 85 %) garantissent sa reproductibilité sur de vastes territoires plus ou moins urbanisés. Cette donnée de végétation est ensuite exploitée pour modéliser les connectivités écologiques potentielles du paysage urbain et périurbain toulousain. L’approche mobilise la théorie des graphes et permet d’évaluer l’impact d’un aménagement urbain sur la biodiversité. Le cas du Boulevard Urbain Nord de Toulouse est étudié. La cartographie proposée des réservoirs de biodiversité, hiérarchisés à l’aide de métriques de connectivité, est avant tout indicative. Elle est finalement confrontée à des documents d’urbanisme (Plans Locaux d’Urbanisme) afin d’obtenir une meilleure visibilité des territoires à enjeux environnementaux et urbanistiques. En fonction des enjeux fixés par les acteurs du territoire et à travers le filtre applicatif, cette thèse propose un outil robuste d’analyse et d’aide à la décision pour la gestion et la planification du territoire. / In urban areas, competition between land development and ecological conservation is intense. To assist decision making, a better knowledge of those areas of interest is required. Regarding inadequacy data and methods needed for ecological network mapping in urban areas, the aim of our study is to develop a method for semi-automatic vegetation extraction with Very High Spatial Resolution Pleiades imagery (VHSR). Initially applied to training samples, the process is then be deployed to four French study areas (Toulouse, Muret, Pierrefite-Nestalas and Strasbourg). The reproducibility of this method over large urbanized areas is ensured by its simplicity and the results of a pixel-based classification (kappa coefficient higher than 85 %). This extraction workflow uses free or open-source software. This vegetation data is then used in order to model potential ecological connectivity in Toulouse’s urban and peri-urban areas. Impacts on biodiversity due to urban planning are assessed using graph theory. The “Boulevard Urbain Nord de Toulouse” project, a road infrastructure, is studied. Graph metrics have been calculated to assess the level of connectivity at habitat patches and landscape scales. We classified the importance of the patches which is cross-tabulated with planning documents (PLU, a local town planning) in order to locate conflict urban areas: between biodiversity preservation and urbanization. Depending on the issues set out by local actors and through the application filter, this thesis proposes a robust analytical tool and decision-making aid for landscape management and land planning.

Les infrastructures vertes urbaines (IVU) fournissent de nombreux bénéfices aux citoyens. L’évaluation des Services Écosystémiques (SE) permet de rendre compte de leur valeur. Le cadre conceptuel des SE valorise la nature de manière instrumentale ou intrinsèque, ce qui est inadapté pour évaluer tous les SE culturels (SEC). La notion de valeur relationnelle permet de combler les lacunes de cette vision dichotomique. Des difficultés demeurent pour opérationnaliser le concept, notamment pour les distinguer des autres valeurs environnementales dû au peu d’études empiriques sur le sujet. S’appuyant sur un cadre théorique de co-construction des SEC, les théories de l’embodiment, puis sur la construction des valeurs relationnelles, cette étude a exploré de manière qualitative les valeurs relationnelles des usagers envers les jardins de rue à Montréal. Puisqu’il s’agit d’une IVU publique en bordure de rue et partagée entre voisins, le rapport à l’espace des usagers est intéressant à étudier. Quatre jardins de rues au profil similaire ont été sélectionnés à cet effet. L’analyse des entrevues semi-dirigées réalisées avec les usagers a démontré leurs valeurs relationnelles envers les jardins de rue. Ceux-ci nourrissent l’identité des usagers, leur fait vivre des expériences valorisées, augmentent leurs capacités et leurs connaissances, accroissent leur sens des responsabilités envers la nature et envers les autres, puis alimentent leur bien-être. Leur rôle social est significatif. L’étude donne des perspectives pour opérationnaliser le concept de valeurs relationnelles en identifiant des indicateurs discursifs de ces valeurs. Les facteurs influençant les valeurs relationnelles des usagers envers les jardins de rue ont été explorés. / Urban green infrastructure (UGI) provides numerous benefits to citizens. Valuation of Ecosystem Services (ES) is a way of accounting for their value. The conceptual framework of ES values nature instrumentally or intrinsically, which is unsuitable for valuing all cultural ES (CES). The notion of relational value can fill the gaps in this dichotomous vision. Difficulties remain in operationalizing the concept, particularly in distinguishing it from other environmental values, due to the paucity of empirical studies on the subject. Drawing on a theoretical framework for the co-construction of CES, embodiment theories, and then on the construction of relational values, this study qualitatively explored users' relational values towards street gardens in Montreal. Since this is a public UGI located on street verge and shared between neighbours, users' relationship to space is interesting to study. Four street gardens with similar profiles were selected for this purpose. Analysis of the semi-structured interviews conducted with users demonstrated their relational values towards street gardens. These gardens nourish users' identity, provide them with valued experiences, increase their skills and knowledge, heighten their sense of responsibility towards nature and others, and fuel their well-being. Their social role is significant. The study provides perspectives for operationalizing the concept of relational value by identifying discursive indicators of these values. Factors influencing users' relational values towards street gardens were explored.

Mångfunktionell grön infrastruktur har en betydande roll för städers resiliens tackvare de ekosystemtjänsterna de bidrar med. På grund av den snabba expansionen avstäder skapas ofta målkonflikter gällande markanvändning vilket har lett till att dengröna infrastrukturen i många fall bortprioriterats. För att motverka denna utvecklingär det viktigt att beakta den gröna infrastrukturen och dess ekosystemtjänster tidigt iplaneringsskedet. Syftet med arbetet är att skapa en modell för att utvärderamångfunktionalitet samt hur ekosystemtjänster påverkas vid förändring i urban miljö.Metoden som legat till grund för arbetet har varit analyser av öppna rumsliga datakombinerat med multikriterieanalys. Arbetet har avgränsats till endast inkluderamiljömångfald, konnektivitet, klimatreglering, samt rekreation. Resultatet av arbetetvisar att genom kombinationen av rumsliga analyser och multikriterieanalys kan fleraekosystemtjänster och ekologiska funktioner analyseras samtidigt. Vidare kanmodellen användas som planeringsunderlag för att identifiera styrkor och utmaningarvid förändring av den gröna infrastrukturen i urbana miljöer. / Multifunctional green infrastructure (GI) is central for the resilience of cities, due tothe ecosystem services (ES) it provides. The rapid expansion of cities often createsconflicting interests regarding the land use, which has led to the undermining of theurban green infrastructure (UGI). It’s, therefore, important to consider GI and ES inthe early stages of urban planning. The aim of this study is to develop a model for GImultifunctionality and ES evaluation. The method used to accomplish this is acombination of a multi-criteria analysis (MCA) and spatial analyses. This study’sscope only incorporates environmental variety, connectivity, climate regulation andrecreation. The results of this study show that the combination of MCA and spatialanalyses allow the evaluation of several ES and ecological functions simultaneously.Furthermore, the model can be used as a basis for the urban planning process throughthe identification of strengths and challenges of the UGI.

[ES] La infraestructura verde urbana ha surgido como un instrumento de excelencia del campus, que puede mejorar la calidad de las funciones y servicios suministrados, y fortalecer las relaciones entre el campus y la comunidad universitaria, y entre el campus y la ciudad. Los miembros de la comunidad universitaria interactúan a menudo con el paisaje del campus y experimentan un cierto nivel de satisfacción con los beneficios derivados de la gestión de los espacios abiertos. En la literatura, estos beneficios se conocen como servicios del paisaje. El perfil del usuario y los parámetros físicos del espacio juegan un papel crucial en la determinación de las funciones y servicios percibidos, lo que se refleja en la preferencia y en el uso del espacio por parte del público. Esta tesis contribuye al conocimiento de las relaciones entre las personas y su entorno exterior cercano en el contexto del paisaje del campus universitario de la Universitat Politècnica de València. El objetivo del estudio es evaluar la funcionalidad de la infraestructura verde urbana en el entorno del campus. Además, la tesis tiene como objetivo comprender cómo la percepción y la satisfacción están mediadas por el perfil de los miembros de la comunidad universitaria, y cómo se relacionan los servicios con la satisfacción. Esta investigación examina si las tipologías actuales de los espacios abiertos del campus satisfacen las preferencias de los miembros de la comunidad universitaria. Para llevar a cabo esta investigación, se ha diseñado una encuesta online. Se ha construido un modelo de ecuaciones estructurales para identificar las relaciones entre la oferta percibida de servicios del paisaje, el perfil de los encuestados y la satisfacción. Se han realizado regresiones lineales y análisis de rutas para analizar las preferencias de los encuestados por los espacios abiertos y explorar las relaciones entre los servicios del paisaje. Los resultados revelan que los encuestados perciben los espacios abiertos del campus principalmente por sus beneficios como proporcionar un espacio para relajarse, socializar con amigos y transitar. La edad, el género, la rama de conocimiento, la frecuencia de uso y la preferencia por el espacio abierto son factores que influyen en la calidad percibida de los servicios de paisaje. Los miembros de la comunidad universitaria prefieren usar espacios abiertos más grandes que se encuentren cerca de las áreas comunes y que brindan fácil acceso a los servicios e instalaciones del campus. Las características que principalmente condicionan la preferencia del espacio son la topografía variada del espacio, la diversidad de árboles y el mobiliario urbano bien equipado. Este trabajo contribuye al conocimiento sobre cómo las variables psicosociales, como la preferencia, la percepción y el uso, se pueden aplicar de manera efectiva en la planificación y el diseño de espacios abiertos. Además, los resultados son útiles no solo para las universidades, sino también para todos los elementos de la infraestructura verde urbana que aún no tienen un diseño de paisaje multifuncional y se están adaptando a las necesidades de sus usuarios. / [CA] La infraestructura verda urbana ha sorgit com un instrument d'excel·lència del campus, que desitja millorar la qualitat de les funcions i serveis subministrats, i enfortir les relacions entre el campus i la comunitat universitària, i entre el campus i la ciutat. Els membres de la comunitat universitària interactuen sovint amb el paisatge del campus i experimenten un cert nivell de satisfacció amb els beneficis que brinda la gestió dels espais oberts. En la literatura, aquests beneficis es coneixen com a serveis del paisatge. El perfil del públic i els paràmetres físics de l'espai juguen un paper crucial en la determinació de les funcions i serveis subministrats percebuts, la qual cosa es reflecteix en la preferència i en l'ús de l'espai per part del públic. Aquesta tesi contribueix al coneixement de les relacions entre les persones i el seu entorn exterior pròxim en el context del paisatge del campus universitari de la Universitat Politècnica de València. L'objectiu de l'estudi és avaluar la funcionalitat de la infraestructura verda urbana a l'entorn del campus. A més, la tesi té com a objectiu comprendre com la percepció i la satisfacció estan mediades pel perfil dels membres de la comunitat universitària, i com es relacionen els serveis amb la satisfacció. Aquesta investigació examina si les tipologies actuals dels espais oberts del campus satisfan les preferències dels membres de la comunitat universitària. Per a dur a terme aquesta investigació, s'ha dissenyat una enquesta en línia. S'ha construït un model d'equacions estructurals per a identificar les relacions entre l'oferta percebuda de serveis del paisatge, el perfil dels enquestats i la satisfacció. S'han realitzat regressions lineals i anàlisis de rutes per a analitzar les preferències dels enquestats pels espais oberts i explorar les relacions entre els serveis del paisatge. Els resultats revelen que els enquestats perceben els espais oberts del campus principalment pels seus beneficis com proporcionar un espai per a relaxar-se, socialitzar amb amics i passar. L'edat, el gènere, la branca de coneixement, la freqüència d'ús i la preferència per l'espai obert són factors que influeixen en la qualitat percebuda dels serveis de paisatge. Els membres de la comunitat universitària prefereixen usar espais oberts més grans que es troben prop de les àrees comunes i que brinden fàcil accés als serveis i instal·lacions del campus. Les característiques rellevants per a la preferència de l'espai són la topografia variada de l'espai, la diversitat d'arbres i el mobiliari urbà ben equipat. Aquesta investigació contribueix al coneixement sobre com les variables psicosocials, com la preferència, la percepció i l'ús, es poden aplicar de manera efectiva en la planificació i el disseny d'espais oberts. A més, els resultats són útils no sols per a les universitats, sinó també per a tots els elements de la infraestructura verda urbana que encara no tenen un disseny de paisatge multifuncional i s'estan adaptant a les necessitats dels seus usuaris. / [EN] Urban green infrastructure has emerged as a campus excellency instrument, which is desired to improve the quality of provided functions and services, and strengthen the relationships between campus and university community, and between campus and city. The university community members often interact with the campus landscape and experience a certain level of satisfaction with the benefits provided by the management of open space. In the literature, these benefits are known as landscape services. The public¿s profile and space physical parameters play a crucial role in determining the functions and perceived supplied services, which echoes in the public¿s preference and use of space. This thesis contributes to the knowledge of the relationships between people and their close outdoor environment in the context of the university campus landscape of Universitat Politècnica de València. The aim of the study is to assess the functionality of urban green infrastructure within the campus setting. Furthermore, the thesis aims to understand how perceptions and satisfaction are mediated by the university community profile, and how services and satisfaction are related. This research examines whether the current typologies of campus open spaces meet the preferences of university community members. To conduct this research, an online survey has been designed. A structural equation model has been built to identify the relationships between the perceived supply of landscape services, respondents¿ profile and satisfaction. Linear regression and path analysis have been conducted to analyse respondents' preferences for open space and explore the relationships among landscape services. Results highlight that respondents perceive campus open spaces mainly for its benefits such as providing a space for relaxation, socialising with friends and passing through. Age, gender, branch of knowledge, frequency of use and preference for open space are factors influencing the perceived quality of landscape services. University community members prefer using larger open spaces that are placed close to common areas and provide easy access to campus services and facilities. When it comes to preference, varied space topography, diversity of trees and well-equipped urban furniture, are relevant features. This research contributes to the knowledge on how psychosocial variables such as preference, perceptions and use, can be effectively applied in open space planning and design. Moreover, the results are helpful not only for universities, but also for all elements of urban green infrastructure that have yet to have a multifunctional landscape design and are adapting to the needs of their users. / I am grateful for the support of the Universitat Politècnica de València and the European Commission through the funding provided for the H2020 GrowGreen Project / Tudorie, CA. (2024). Perceptions of Landscape Services Provided by Urban Green Infraestructure. The Case Study of a Campus Open Space [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/206193