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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An Opportunity for Renewals: : The Participatory Process and Social and Income Diversity in Brownfield Development

Reardon, Mitchell January 2010 (has links)
<p>Reardon, Mitchell. (2010) <em>An Opportunity for Renewal: The Participatory Process and Social and Income Diversity in Brownfield Developments</em></p><p>Urban and Regional Planning, advanced level, master thesis for master exam in Urban and Regional Planning, 30 ECTS credits.</p><p>Supervisor: Dr. Thomas Borén</p><p>Language: English</p><p> </p><p>Participatory planning and the redevelopment of brownfield locations have both figured prominently in urban and regional planning strategies in recent decades. Despite their growing importance, these trends have rarely been analysed in concert however. Further, the issues of social and income diversity within this context have received less attention. In recognizing this void, this paper explores the use of participatory planning in brownfield developments, with an emphasis on social and income diversity. Through a review of the participatory planning theories of communicative action and the just city, strategies for promoting participatory planning and social and income diversity, are identified. A case study of Norra Djurgårdsstaden, a brownfield development in Stockholm, Sweden is employed to analyse these strategies. In undertaking the case study, data was collected through interviews and planning documents. This study found that the inherently high cost of redeveloping brownfield locations inhibits social and income diversity and requires an overt response to mitigate it. Participatory planning offers the possibility of engaging stakeholders who may otherwise be ignored, providing the opportunity to create a more inclusive development. It is also clear that an inclusionary goal must be part of a wider strategy, or is otherwise likely to be ignored.</p>
2

An Opportunity for Renewals: : The Participatory Process and Social and Income Diversity in Brownfield Development

Reardon, Mitchell January 2010 (has links)
Reardon, Mitchell. (2010) An Opportunity for Renewal: The Participatory Process and Social and Income Diversity in Brownfield Developments Urban and Regional Planning, advanced level, master thesis for master exam in Urban and Regional Planning, 30 ECTS credits. Supervisor: Dr. Thomas Borén Language: English   Participatory planning and the redevelopment of brownfield locations have both figured prominently in urban and regional planning strategies in recent decades. Despite their growing importance, these trends have rarely been analysed in concert however. Further, the issues of social and income diversity within this context have received less attention. In recognizing this void, this paper explores the use of participatory planning in brownfield developments, with an emphasis on social and income diversity. Through a review of the participatory planning theories of communicative action and the just city, strategies for promoting participatory planning and social and income diversity, are identified. A case study of Norra Djurgårdsstaden, a brownfield development in Stockholm, Sweden is employed to analyse these strategies. In undertaking the case study, data was collected through interviews and planning documents. This study found that the inherently high cost of redeveloping brownfield locations inhibits social and income diversity and requires an overt response to mitigate it. Participatory planning offers the possibility of engaging stakeholders who may otherwise be ignored, providing the opportunity to create a more inclusive development. It is also clear that an inclusionary goal must be part of a wider strategy, or is otherwise likely to be ignored.
3

NATIONAL SCALE IMPACT OF THE STOCKHOLM ROYAL SEAPORT PROJECT : Demand Response and Load-shift for Swedish Apartment Customers

Gebro, Per January 2013 (has links)
The Swedish electrical power system faces many challenges. Stricter environmental and economic demands require a more efficient use of both the transmission and distribution grids as well as the production capabilities. Since the Swedish national demand of electricity is fluctuating, the system has always been dimensioned to meet the periods of high demand, resulting in a low utilization of the system. To meet these challenges, the concept of a “Smart Grid” has been phrased. One of the most important goals of a Smart Grid is to enable end-consumers to participate more actively in the energy market. One way to do this is through “load-shifting” where consumption (or loads) are moved from hours of high demand (peak hours) to hours of low demand (off-peak hours). Load-shifting is a part of a set of intentional consumption modifications denoted “Demand Response” (DR) and is deemed to be one of the most important tools of the Smart Grid. In Sweden, a Smart Grid project called the Stockholm Royal Seaport (SRS) project is currently taking place. The project have phrased a hypotheses regarding load-shifting called the “Active customer” scenario, in which a customer load-shifts 5-15 % of his electricity consumption. To facilitate this scenario, the SRS project uses an end-consumer price model for electricity, called the SRS price model, as well as technological and market solutions not yet available on a national scale.   This study investigates what impact the results from the SRS pilot project might have if implemented for private apartment end-consumers on a Swedish national scale. The study is divided into three parts. The first part investigates the challenges of a national scale implementation of private apartment end-consumer DR and the SRS price model. The second part investigates what the impact would be if the entire Swedish private apartment end-consumer sector where to act in accordance with the Active customer scenario. The third part consists of a sensitivity analysis. Four challenges for a national private apartment end-consumer load-shift implementation have been elicited. They are; the lack of easily moveable loads in a foreseeable future, the heterogeneous cost of distribution, the suggested price models low peak to off-peak price ratio and the comparatively small cost of electricity of the private apartment end-consumers. The SRS price model is deemed to give a clear economic incentive for load-shift of private apartment end-consumer without electric heating. However, the incentive might be considered too weak with yearly savings of 48-165 SEK for a 15 % load-shift, depending on apartment consumption. This corresponds to yearly savings of 124 to 429 million SEK for the entire customer segment. These challenges are deemed to be of a non-technical character, but rather of a marketing and communication nature. The impact of a fully implemented national private apartment end-consumer load-shift in accordance with the Active customer scenario and the SRS price model is deemed to be beneficial from an overall power system point of view. However, the impact on the private apartment end-consumer national demand is small in comparison with other plausible system developments, such as energy demand reductions due to more efficient lighting solutions. The sensitivity analysis of private apartment end-consumer cost savings when acting in accordance with the Active customer scenario indicates that the percentage savings may increase in the future when considering more volatile prices for electric energy or the implementation of a time differentiated energy tax.
4

Dynamic pricing and carbon intensity in demand response functions

Ekman, Oskar January 2014 (has links)
The European power sector is facing significant challenges related to investments in grid infrastructure and generation capacity. The continued deployment of intermittent renewables also puts pressure on current grid conditions. Smart grids is seen as a cost-efficient way to overcome these challenges through a more efficient use of current capacity. Demand response is a corner-stone in smart grid development,  and is implemented to introduce flexibility on the demand side. Most demand response programs have used dynamic pricing to incentivize consumers to shift consumption from peak to off-peak hours. In Stockholm Royal Seaport, where a sustainable energy system is envisioned, it has been proposed that dynamic pricing should be complemented with an indicator depicting carbon intensity of purchased electricity. This indicator is based on average emissions, which is one of two fundamental perspectives on assessing environmental impacts of electricity consumption.  The aim of this study was to evaluate whether the approach used to quantify carbon intensity in Stockholm Royal Seaport is appropriate in the context of demand response. To achieve this, a literature review has been conducted regarding potential benefits of demand response, power system dynamics and carbon dioxide allocation methods. A quantitative analysis has also been conducted, where the signal proposed for Stockholm Royal Seaport has been modeled under different timeframes. The results show that the CO2-signal in Stockholm Royal Seaport is constructed in such a way that it is largely affected by hydro generation, which in turn makes it correlate negatively with price. As a result, the CO2-signal would counteract many of the predicted long-term benefits of demand response. Furthermore it seems unlikely that the signal would result in significant short-term emission reductions, since hydro generally is used to balance supply and demand in the Swedish and Nordic systems.  Based on the literature review, it was concluded that marginal emissions would be a more appropriate environmental indicator than average emissions. However, it remains a difficulty to construct a day-ahead control signal based on this perspective because of system complexity and lack of data. Historical marginal carbon intensity was nevertheless modeled in this study using a linear regression model. The results indicate that price itself might be a sufficient indicator of marginal emissions. Finally, a model for a signal based on prognoses of intermittent renewable generation is proposed, where the rationale is that consumers should decrease consumption during hours of low renewable generation. This signal was modeled using data on renewable generation from Denmark since corresponding data in Sweden is not yet available. Results show that it would be possible to construct a rather accurate control signal in this way. There are also reasons to believe that demand response based on this type of signal would result in long-term environmental benefits. / Den europeiska energisektorn står inför stora utmaningar, bland annat i form av investeringsbehov i nätinfrastruktur och produktionskapacitet för att säkra framtida leveranssäkerhet. Den fortsatta utbyggnaden av intermittent förnybar kraftproduktion ställer också nya krav på nätet och på aktörernas flexibilitet. Smarta nät ses som ett kostnadseffektivt sätt för att övervinna dessa utmaningar genom en mer effektiv användning av nuvarande kapacitet. En viktig del i detta är efterfrågerespons, som syftar till att minska belastningen på nätet under höglasttimmar genom att i högre grad än tidigare involvera konsumenten. De flesta initiativ inom efterfrågerespons har använt dynamisk prissättning för att uppmuntra konsumenter att flytta konsumtion från höglast- till låglasttimmar. I Norra Djurgårdsstaden, där visionen är att bygga ett hållbart och mer flexibelt energisystem, har det föreslagits att dynamisk prissättning bör kompletteras med en indikator som visar den inköpta elens koldioxidintensitet. Denna indikator är baserad på medelel, vilket är ett av två fundamentala sätt att miljövärdera el. Syftet med denna studie var att utvärdera om den metod som används för att kvantifiera koldioxidintensiteten i Norra Djurgårdsstaden är lämplig i samband med efterfrågerespons. För att uppnå detta har en litteraturstudie genomförts gällande potentiella fördelar med efterfrågerespons, hur kraftsystemet fungerar samt olika metoder för att miljövärdera el. En kvantitativ analys har också genomförts, där CO2-signalen i Norra Djurgårdsstaden har modellerats utifrån olika tidsperspektiv. Resultaten visar att CO2-signalen i Norra Djurgårdsstaden är konstruerad på ett sådant sätt att den till stor del påverkas av vattenkraftens produktionsvariationer, vilket i sin tur gör att signalen generellt rör sig i motsatt riktning mot prissignalen. Resultatet av detta är att CO2-signalen motverkar många av de långsiktiga fördelarna med efterfrågestyrning. Dessutom ter det sig osannolikt att signalen skulle leda till signifikanta utsläppsminskningar på kort sikt, eftersom lasten i Sverige främst balanseras av variationer i vattenkraft. Utifrån litteraturstudien kan man dra slutsatsen att marginalelens koldioxidintensitet skulle vara en lämpligare miljöindikator än genomsnittliga utsläpp i samband med efterfrågestyrning. Det är dock svårt att i praktiken konstruera en styrsignal baserat på detta perspektiv på grund av systemets komplexitet och brist på data. Historiska marginella utsläpp modellerades emellertid med hjälp av linjär regression. Resultaten från detta indikerade att priset kan vara en tillräcklig indikator även för variationerna i koldioxidintensitet utifrån ett marginalperspektiv. Slutligen föreslås en modell för en signal baserad på dagenföreprognoser om intermittent förnybar produktion, där budskapet skulle vara att användaren minskar sin konsumtion under timmar med låg förnybar produktion. Denna signal modellerades med hjälp av uppgifter om förnybar produktion från Danmark eftersom motsvarande uppgifter om Svensk produktion inte finns tillgängliga ännu. Resultaten visar att det skulle vara möjligt att konstruera en relativt träffsäker styrsignal på detta sätt. Det finns också skäl att tro att efterfrågerespons baserat på denna typ av signal skulle leda till miljömässiga fördelar på längre sikt.
5

National scale impact of the Stockholm Royal Seaport project : Demand response and load-shift for Swedish apartment customers

Gebro, Per January 2013 (has links)
The Swedish electrical power system faces many challenges. Stricter environmental and economic demands require a more efficient use of both the transmission and distribution grids as well as the production capabilities. Since the Swedish national demand of electricity is fluctuating, the system has always been dimensioned to meet the periods of high demand, resulting in a low utilization of the system. To meet these challenges, the concept of a “Smart Grid” has been phrased. One of the most important goals of a Smart Grid is to enable end-consumers to participate more actively in the energy market. One way to do this is through “load-shifting” where consumption (or loads) are moved from hours of high demand (peak hours) to hours of low demand (off-peak hours). Load-shifting is a part of a set of intentional consumption modifications denoted “Demand Response” (DR) and is deemed to be one of the most important tools of the Smart Grid. In Sweden, a Smart Grid project called the Stockholm Royal Seaport (SRS) project is currently taking place. The project have phrased a hypotheses regarding load-shifting called the “Active customer” scenario, in which a customer load-shifts 5-15 % of his electricity consumption. To facilitate this scenario, the SRS project uses an end-consumer price model for electricity, called the SRS price model, as well as technological and market solutions not yet available on a national scale.   This study investigates what impact the results from the SRS pilot project might have if implemented for private apartment end-consumers on a Swedish national scale. The study is divided into three parts. The first part investigates the challenges of a national scale implementation of private apartment end-consumer DR and the SRS price model. The second part investigates what the impact would be if the entire Swedish private apartment end-consumer sector where to act in accordance with the Active customer scenario. The third part consists of a sensitivity analysis. Four challenges for a national private apartment end-consumer load-shift implementation have been elicited. They are; the lack of easily moveable loads in a foreseeable future, the heterogeneous cost of distribution, the suggested price models low peak to off-peak price ratio and the comparatively small cost of electricity of the private apartment end-consumers. The SRS price model is deemed to give a clear economic incentive for load-shift of private apartment end-consumer without electric heating. However, the incentive might be considered too weak with yearly savings of 48-165 SEK for a 15 % load-shift, depending on apartment consumption. This corresponds to yearly savings of 124 to 429 million SEK for the entire customer segment. These challenges are deemed to be of a non-technical character, but rather of a marketing and communication nature. The impact of a fully implemented national private apartment end-consumer load-shift in accordance with the Active customer scenario and the SRS price model is deemed to be beneficial from an overall power system point of view. However, the impact on the private apartment end-consumer national demand is small in comparison with other plausible system developments, such as energy demand reductions due to more efficient lighting solutions. The sensitivity analysis of private apartment end-consumer cost savings when acting in accordance with the Active customer scenario indicates that the percentage savings may increase in the future when considering more volatile prices for electric energy or the implementation of a time differentiated energy tax.
6

Prospects of a sustainable transport system : the case of Stockholm Royal Seaport in 2030. Scenarios of travel behaviour and technological change for a fossil fuel free transport system

Rytterbro, Jon January 2011 (has links)
The transport system is acknowledged as one of the most difficult sectors for sustainable development today. Stockholm Royal Seaport has expressed the ambitious target of developing a fossil free transport system by 2030. This report evaluates several individual measures for carbon dioxide emission reductions and thereafter uses the backcasting approach to investigate how the combination of these can meet the target for the transport system. The results show that a broad range of measures, regarding both behaviour change and technological systems, must be implemented to their maximal potential for the target to be realised.
7

Power quality in low voltage grids with integrated microproduction

Einarsson, Mårten January 2010 (has links)
This report seeks to evaluate and predict possible power quality issues regarding Fortums engagement in the project of Stockholm Royal Seaport. Stockholm Royal Seaport is a city district planned by Stockholm Municipality to be constructed based on sustainable urban city principles. Fortum has, together with additional partners, engaged in the challenge to create a sustainable energy system. This is thought to be achieved through several measures. Energy saving actions are incorporated at several levels and there is a plan to create a “smart grid” for the electricity supply. A smart grid has no strict definition but in this case a key feature is “demand-response” which effectively means a way to optimize the consumption to have a more balanced consumption over the 24 hours of a day. One of the key components in the smart grid is the “active house” which is planned to have several specific features separating it from an ordinary house. It is planned to have its own contribution to electricity production using solar cells and an energy storage using batteries. Another feature is thought to be both automation and economic incentives measures to achieve peak load reduction. This thesis has taken the perspective of the end customer in the active house and has tried to evaluate the power quality to be experienced. An investigation regarding the different components has been carried out to get an overview from the mentioned perspective and identify possible problems or issues that may require attention in the realization of Stockholm Royal Seaport. It has been found that no major problems are to be expected but some smaller issues has arisen that might be worthwhile giving some attention.
8

Dagsljus i stadsplaneringen : En fallstudie i Norra Djurgårdsstaden / Daylight in Urban Planning : A Case Study in Stockholm Royal Seaport

Höglund, Jonathan January 2018 (has links)
Daylight has, since the mid 1900’s, been controlled in Swedish construction when Sweden achieved prosperity in society. Since then, the issue in how you plan for the best daylight conditions has had a number of major changes for it to become today’s functional requirement, controlled by Boverket and its building regulations BBR. The requirement has although been questioned lately as the building process has become much more complex which has renewed an interest of the issue during the 2000’s. That humans need daylight to feel good and to stay healthy is commonly known while it also can enable great savings in the energy use. The purpose of this study is therefore to study if the daylight issue is an important urban planning aspect and how good daylight conditions could be achieved when planning new residential areas. The goal is to evaluate the daylight conditions in Norra Djurgårdsstaden (Stockholm Royal Seaport), Stockholm’s environmentally-friendly urban development project, and its segments Västra, Norra 1 and 2. The goal is also to study how the issue was dealt with during the planning and building process. As a result, I hope that the study will generate interest and knowledge in how the daylight issue may be handled in the early stages of urban planning. The study is designed as a case study in order to, in an explorative way, investigate and briefly evaluate the daylight conditions of Norra Djurgårdsstaden. The study has embraced the method Vertical Sky Component, VSC, in order to provide a first indicator about the daylight conditions and to, in the early stages of urban planning, show upon possible improvements. As complementary work, studies of planning documents and interviews was made in order to investigate if and how the daylight issue was dealt with during the planning and building process. The results showed that the studied segments of Norra Djurgårdsstaden achieves relatively good daylight conditions and the problem lies within the limited daylight access where the segment Västra has the worst conditions. However, the current daylight conditions on the facades was improved in a later stage during the building process to reach the national requirement. The VSC-study alone can’t therefore investigate the actual daylight conditions in houses. The municipality has rarely brought up daylight as an issue in current planning documents but more frequently in later ones. This is also the trend in how the issue has been prioritized over time. The reasons behind this proved to be current urban planning trends and tough energy requirements along with new environmental certifications for buildings. Knowledge is also a key factor for the increasing interest in the daylighting issues, mostly brought up by builders. No discussions about the issues has occurred for the segment Västra in the early stages of urban planning as it is controlled in the latter permit process. This study shows that this is problematic and the issue needs to be discussed earlier in order to create better conditions to fulfil the national requirements. Yet again, knowledge and also awareness of the daylight issue is important. Today’s requirement set by Boverket has proven to be complicated to relate to during the urban planning and building process. Therefore, a development with clearer demands, directives, better interpretations and to some extent new calculation methods is needed. VSC could here be lifted as a possible method in order to easily and comprehensively analyse daylight conditions in early planning stages. The results from this studies’ VSC calculations highlighted some lack of sufficient daylight conditions and that it is possible to improve it and maintain the same degree of exploitation depending on how you plan. / Dagsljus har reglerats i svenskt byggande sedan mitten av 1900-talet då Sverige uppnått välstånd i samhället. Sedan dess har frågan om hur man bäst planerar för goda dagsljusförhållanden genomgått flera större förändringar till att idag vara ett funktionskrav reglerat utav Boverket i deras byggregler, BBR. Kravet har dock blivit ifrågasatt samtidigt som planeringsprocessen blivit allt mer komplex vilket väckt ett förnyat intresse av dagsljusfrågan i stadsplaneringen under 2000-talet.Att människan behöver dagsljus för att må bra och för att hålla sig frisk är allmänt känt samtidigt som det kan möjliggöra stora besparingar i energianvändningen. Syftet med denna studie är således att studera om dagsljusfrågan är en prioriterad planeringsfråga och hur goda dagsljusförhållanden som kan uppnås vid planering av nyproducerade bostadsområden. Målet är att utvärdera dagsljusförhållandet på fasader i Norra Djurgårdsstaden, Stockholms nya miljöprofilerade stadsutvecklingsprojekt, och dess etapper Västra, Norra 1 och 2 samt hur dagsljusfrågorna hanterats i plan- och byggprocessen. Som resultat hoppas jag att studien väcker intresse och ökar kunskapen om hur dagsljusfrågor hanteras i planeringens tidiga skeden. Studien är utformad som en fallstudie för att explorativt utforska och översiktligt utvärdera dagsljusförhållandena i Norra Djurgårdsstaden. Studien har anammat beräkningsmetoden Vertical Sky Component, VSC, för att i ge en första indikator om dagsljusförhållandet och för att i tidigt planeringsskede visa på att det går att förbättra förhållandena. Som komplement har dokumentstudier samt intervjuer gjorts för att utröna om och hur dagsljusfrågan hanterats i plan- och byggprocessen. Resultatet visade på att de berörda etapperna i Norra Djurgårdsstaden uppnår relativt goda dagsljusförhållanden där problemet ligger i att en stor andel svarar för en begränsad tillgång och att etapp Västra svarar för det sämsta resultatet överlag. Dock har de befintliga dagsljusförhållandena på fasader förbättrats i ett senare skede under byggprocessen till att uppfylla dagsljuskravet, och att VSC-studien inte ensamt kan utvärdera den faktiska dagsljustillgången i bostäder. Under planprocessen har kommunen sällan tagit upp dagsljus i gällande plandokument men desto mer i senare dokument. Detta är även en trend sett till hur dagsljusfrågan allmänt varit prioriterad över tid. Anledningarna visade sig vara att rådande byggnadstrender och höga energikrav samt nya sätt att miljöcertifiera byggnader lett till att problematiken och således prioriteringen kring dagsljus ökat. Kunskap är även en nyckelfaktor till att dagsljusfrågan blivit allt mer aktuell där det främst är byggherren som lyfter frågan. I etapp Västra har diskussioner om dagsljusfrågan inte förekommit i tidiga skeden utan kontrollerats i senare skeden under bygglovsprocessen och anmälandelen. Denna studie visar på att detta är problematiskt där dagsljusfrågan behöver lyftas tidigare för att skapa bättre förutsättningar till att klara kravet. Även kunskap och medvetenhet och dagsljusfrågan är viktig. Dagens dagsljuskrav som ställs av Boverket har visat sig vara problematiskt att förhålla sig till under plan- och byggprocessen och att det således behöver utvecklas och bli tydligare med direktiv, bättre tolkningar och i viss mån nya beräkningsmetoder. Det är här VSC kan lyftas som en möjlig metod för att enkelt och översiktligt analysera dagsljusförhållandena i tidigt planeringsskede. Resultatet från studiens VSC-beräkning belyste en viss brist på goda dagsljusförhållanden och att det är möjligt att förbättra det och behålla samma exploateringsgrad beroende på hur man väljer att planera.
9

A physical accounting model for monitoring material flows in urban areas with application to the Stockholm Royal Seaport district / En fysisk räkenskapsmodell för övervakning av materialflöden i urbana områden med applikation i Norra Djurgårdsstaden

Papageorgiou, Asterios January 2018 (has links)
There is a plethora of methods and tools that can be used for the assessment of Urban Metabolism. Nevertheless, there is no standardized method for accounting of material flows within and across the boundaries of urban systems. This thesis aims to provide a physical accounting model for monitoring material flows in urban areas that could potentially become the basis for the development of a standardized accounting method in the long term. The model is based on a Physical Input Output Table framework and builds upon the strengths of existing accounting methods but at the same time it demonstrates new features that can address their limitations. The functions of the model were explored and evaluated through its application to an urban neighbourhood in the Stockholm Royal Seaport. Bottom-up data were used for the application of the model in the case study. The application of the model provided a preliminary description of the material flows in the neighbourhood and most importantly provided information that underpinned the assessment of the strengths and limitations of the model. It was deduced, that on the one hand the model can describe successfully the physical interactions between the urban socioeconomic system and the environment or other socioeconomic systems and at the same it has the potentials to illustrate the intersectoral flows within the boundaries of the system. In addition, it can be used to structure available data on material flows and promote the study of an urban system with a life cycle perspective. On the other hand, the process of compiling the tables of the model can be considered as complex and moreover the data requirements for the compilation of the tables are significant. Especially, the compilation of the tables of the model with bottom-up data may require a laborious data collection and analysis process, which however may not address all data gaps. Thus, the combination of bottom-up data with top-down data is recommended. Moreover, it is recommended the development of integrated databases for data collection and management at the municipal level and the fostering of collaboration between stakeholders within the municipalities to facilitate dissemination of data and information. / Mer än hälften av den globala befolkningen bor numera i urbana områden och denna andel uppskattas öka under de kommande årtiondena. Urbana system förbrukar fysiska resurser och genererar stora mängder av rester vilket innebär påfrestningar på miljön samt hindrar en hållbar utveckling. Således kan förståelse av Urban Metabolism (UM) stödja insatserna för att effektivisera resursförbrukningen och avfallshanteringen. I detta sammanhang har en stor mängd av metoder och verktyg utvecklats och tillämpats i UM-studier, såsom Materialflödeanalys (Material Flow Analysis - MFA) och Input-output Analys (Input Output - IOA) baserat på fysiska input-output tabeller (Input Output Tables – PIOTs). Ändå saknas en standardiserad metod för redovisning av materialflöden inom och över gränserna av urbana system. I samband med detta examensarbete utvecklades en fysisk räkenskapsmodell för övervakning av materialflöden i urbana områden. Denna modell kan potentiellt bli grunden för en enhetlig metod för beräkning av materialflöden i urbana system. Modellen utvecklades i en stegvis process och baserades på litteraturgranskning. Grunden för modellen är ett omfattande PIOT ramverk som kan användas för registrering av materialflöden i urbana system. PIOT ramverket är annorlunda än de typiska PIOT-systemen. Det ger en tydligare avgränsning av systemgränserna, det visar tydligt ursprung och destination för materialflöden, och dessutom kan det erbjuda ett livscykelperspektiv på materialflödena. Modellen består av en uppsättning identiska PIOT. Varje deltabell innehåller materialflöden som tillhör i en specifik klass, medan huvudtabellen aggregerar materialet som strömmar för alla material från deltabellerna. Därigenom kan modellen avbilda materialflödena i ett aggregat-perspektiv och samtidigt ge fysiska räkenskaper för specifika materialtyper. Modellen användes i en nybyggd stadsdel i Norra Djurgårdsstaden (NDS), för att utforska och bedöma dess funktioner. För att kartlägga och kvantifiera flödena i stadsdelen genomfördes en MFA baserad på “bottom-up-data”. Insamlingen och analysen av data var emellertid en besvärlig process och dessutom kunde flera materialflöden inte kvantifieras på grund av databrister. Därför kunde modellens tabeller inte fyllas fullständigt och ett flödesdiagram skapades med både kvantitativa och kvalitativa flöden. Trots att det fanns databrister lyckades tillämpningen av modellen att avbilda UM i det avgränsade urbana systemet på ett adekvat sätt. Det visade tydligt att nästan 96% av de materiella insatserna är ackumulerade i lager. Dessutom fastställde modellen kvalitativt den fysiska växelverkan mellan det urbana systemet och den naturliga miljön, det nationella socioekonomiska och det globala socioekonomiska systemet. Emellertid var det inte möjligt att bedöma modellens fullständiga potential eftersom det inte var möjligt att upprätta intersektorala kopplingar. Dessutom beräknades indirekta flöden av flera importerade material baserat på koefficienterna för materialintensitet. Detta tillvägagångssätt kan erbjuda insikt om de uppströms påfrestningar som orsakas av materialproduktionen. Dock finns det endast koefficienter för specifika material. Därför kan de inte användas för att uppskatta de indirekta flödena för varje materialinflöde. Dock framhöll deras partiella tillämpning att indirekta flödena var 38% högre än direktflödena, vilket indikerar att påfrestningar som utövas till miljön på grund av produktion av importerade material är betydande. Tillämpningen av modellen möjliggjorde en bedömning av både styrkor och svagheter hos modellen. Å ena sidan kan modellen fastställa fysiska interaktioner mellan det urbana socioekonomiska systemet och naturmiljön, det nationella socioekonomiska systemet och det globala socioekonomiska systemet. Dessutom har det potential att beskriva intersektorala flöden inom gränserna för det urbana systemet och det kan erbjuda insikt om materialinflödenas ursprung och materialutflödenas destination. En annan styrka i modellen är att den erbjuder livscykelperspektiv genom att ta hänsyn till indirekta flöden av importerade material. Å andra sidan demonstrerades att sammanställningenav modellens tabeller kräver en stor mängd data, speciellt när data erhålls med ett ”bottom-up” tillvägagångssätt. Ändå är bottom-up data inte alltid tillgängliga för urbana områden. En annan svaghet är att sammanställningenav tabellerna i modellen med bottom-up-data kräver en mödosam process för datainsamling och analys. Dessutom kräver analysen av data många antaganden som ökar osäkerheten i resultaten. Ovanstående svagheter i modellen kan hindra tillämpningen av modellen för räkenskap av materialflöden på urbana områden. Således rekommenderas kombinationen av bottom-up-data med top-down data för tillämpning av modellen. Dessutom föreslås utvecklingen av integrerade databaser för datainsamling om materialflöden i urbana områden.
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Exploring stakeholder perceptions of nature-based solutions to provide resilience against heatwaves in the Stockholm Royal Seaport: A mental mapping approach

Rieger, Jorinde-Marie January 2024 (has links)
Urban areas worldwide, including Stockholm, face increasing environmental challenges such as rising temperatures and heatwaves exacerbated by climate change and urban heat island effects. In response, nature-based solutions (NBS) have been proposed as a planning tool for enhancing urban resilience. However, evidence on the fine-scale effectiveness of NBS in addressing extreme events, such as heatwaves remains limited. Furthermore, the inclusion of subjective measures to enrich objective measures for increased NBS benefits and thermal comfort assessments is needed. This study investigates the cooling effectiveness of NBS, hence strengthening the resilience of the Stockholm Royal Seaport against heatwaves. Mental mapping interviews were used to explore residents' and expert advisors' perceptions of the cooling effects of NBS. Key findings reveal the significant cooling effects of large natural areas such as parks and waterbodies, notably the Royal National City Park. However, smaller NBSs, while contributing to the green aesthetic and climate regulation of the neighborhood, were not perceived by residents as cooling. The study emphasizes the importance of the proximity and size of NBS to residential areas and highlights the subjective nature of neighborhood boundaries that influence residents' perceptions of NBS cooling effects. A comparison of residents’ and advisors’ perceptions reveals differences between theoretical expert and experience-based knowledge. These differences highlight the need for participatory planning processes that have the potential to complement advisor knowledge with resident perception and contribute to user-based planning. Overall, the study contributes to understanding the role of NBS in urban resilience, advocates for participatory approaches to urban planning, and demonstrates the value of mental mapping in capturing nuanced community perspectives for future planning efforts by revealing experiential knowledge that may remain hidden in a dialogue.

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