Living walls in indoor environments

© 2018 The warming climate, projected increase in frequency and severity of extreme heat events, and the long-established heat island phenomenon are all expected to exacerbate urban environmental thermal loading. Active means used for addressing such risks are likely to increase energy consumption and emission trends to create a positive feedback loop that could threaten the health and wellbeing of urban citizens. In response, passive approaches such as green infrastructure enhancements are widely advocated, and to meet the challenges of implementing enhancements in dense cities, attention has been directed toward encouraging surface greening. This paper recognises this trend and considers vertical greening as a developing interest with application opportunity in both exterior and interior urban environments. A review of available studies and interviews with experts found most observations available to be derived from exterior applications. Interior applications consequently have yet to be investigated to determine relative value to indoor environments where most of human habitation is typically concentrated. The integration of plant science studies in this regard is highlighted as essential to develop a balanced evidence base for the enthusiasm observed for promoting indoor living wall installations.EPSR

Adaptive comfort assessments in urban neighbourhoods: Simulations of a residential case study from London

A warming climate, increasing frequency and severity of extreme heat events, and the heat island effect are cumulatively expected to exacerbate climate thermal loading on urban buildings. This in turn could lead to increased summertime overheating risk, with any active means for addressing this likely to influence future energy consumption and CO2 emission patterns. This paper examines how the microclimatic loading presented by the heat island (UHI) effect influences summertime adaptive comfort in traditional urban residential buildings.Funding: this work was partly supported by the Cambridge Commonwealth, European and International Trust, University of Cambridge

Urban living walls: reporting on maintenance challenges from a review of European installations

In response to the need to mitigate urban heat risks, green infrastructure enhancements have been widely advocated in recent times. To meet the challenges of implementing enhancements in dense cities, surface greening approaches such as vertical living walls have gained increased prominence. This paper reports on the principal challenges and drivers influencing the sustainable maintenance of such installations, identified through the inspection of ten European case studies and interviews with their management authorities. The study reports on key maintenance areas highlighted by installation managers as requiring attention. Furthermore, it reports on human engagement behavioural aspects as being a significant motivator, with installation managers assigning value to building occupant and public perception of an installation’s flourishing state. The evidence reported, therefore, is beneficial to key decision-makers and designers when considering the inclusion and sustainable maintenance of such greening installations.EPSRC Studentshi

Living wall influence on microclimates: An indoor case study

Abstract To address the call for developing passive climate resilience strategies, the project examines the influence and effectiveness of utilising vertical greening for reducing space-conditioning loads of urban buildings and surrounding microclimates. By examining this focus, the project aims to improve the design of urban built environments that would in turn lead to health and wellbeing enhancements of their growing populations. The purpose of this paper is to present preliminary findings from a monitoring campaign carried out at an indoor atrium case study in Cambridge, UK. Key parameters monitored included soil, surface, and air temperature; relative humidity; and surface air movement. Results obtained show relatively lower air temperature and higher relative humidity levels proximate to the living wall. Wintertime monitoring has also indicated a surface flow pattern that demonstrates the presence of a modest downdraught effect. Although these modifications are modest in magnitude, they could still offer significant localised thermal comfort benefit to building occupants, as well as potential for contributing to a reduced space-conditioning load.</jats:p

Simulation pathway for estimating heat island influence on urban/suburban building space-conditioning loads and response to facade material changes

© 2019 Elsevier Ltd Environmental thermal loading on urban buildings is expected to increase owing to the combined influence of a warming climate, increasing frequency and severity of extreme heat events, and the urban heat island (UHI) effect. This paper presents how a computationally efficient estimation pathway could be utilised to understand UHI influence on building energy simulations. As an example, this is examined by considering UHI influence on the space-conditioning loads of office buildings within urban and suburban conditions, and how the trend of replacing heavyweight facades with lightweight alternatives could affect their surrounding microclimates, as well as building energy use. The paper addresses this through simulations of street canyons based on the urban Moorgate and suburban Wimbledon areas of London. Results show that with all scenarios including the UHI within a dynamic thermal simulation presents between 2.5 and 9.6% net increase in annual space-conditioning. The study also demonstrates that the trend in urban centres to replace heavyweight facades with lightweight insulated alternatives increases space-conditioning loads, which in turn increases UHI intensity to create a warming feedback loop. The study therefore stresses the significance of including microclimate loading from the UHI in estimating urban and suburban energy use, and the combined simulation approach is presented as a computationally efficient pathway for use by built environment designers

Simulation pathway for estimating heat island influence on urban/suburban building space-conditioning loads and response to facade material changes

Environmental thermal loading on urban buildings is expected to increase owing to the combined influence of a warming climate, increasing frequency and severity of extreme heat events, and the urban heat island (UHI) effect. This paper presents how a computationally efficient estimation pathway could be utilised to understand UHI influence on building energy simulations. As an example, this is examined by considering UHI influence on the space-conditioning loads of office buildings within urban and suburban conditions, and how the trend of replacing heavyweight facades with lightweight alternatives could affect their surrounding microclimates, as well as building energy use. The paper addresses this through simulations of street canyons based on the urban Moorgate and suburban Wimbledon areas of London. Results show that with all scenarios including the UHI within a dynamic thermal simulation presents between 2.5 to 9.6 % net increase in annual space-conditioning. The study also demonstrates that the trend in urban centres to replace heavyweight facades with lightweight insulated alternatives increases space-conditioning loads, which in turn increases UHI intensity to create a warming feedback loop. The study therefore stresses the significance of including microclimate loading from the UHI in estimating urban and suburban energy use, and the combined simulation approach is presented as a computationally efficient pathway for use by built environment designers

The role of Social Capital in Education Literature: A Critical Synthesis

This critical synthesis incorporates both theoretical and empirical literature on social capital. A primary role of social capital is to enable a child to gain access to human, cultural, and economic capital, as well as to school resources and support. The focus of the review is on educational literature that studies social capital and educational equity. After outlining the approach, next, the study undertakes a critical review of the literature by first examining emphatical literature, trends in conceptualization, theoretical base, method and then assessing empirical support for claims that social capital is positively linked to education equity. Finally, discuss gaps in the conceptualization, measurement, and analysis of social cultural, economic and human capital in educational literature. Keywords: educational equity, literature reviews, social, economic, cultural and human capita

Small irrigation tanks as a source of malaria mosquito vectors: a study in north-central Sri Lanka

Watersheds / Tank irrigation / Rehabilitation / Malaria / Waterborne diseases / Disease vectors / Sri Lanka / Yan Oya

Current distribution and abundance of slender lorises (Loris tardigradus and L. Iydekkerianus) in Sri Lanka

Two species of slender lorises are currently recognized in Sri Lanka. They are Sri Lanka red slenderloris (Loris tardigradusj and Grey slender loris (L. lydekkerianus i, with four currently recognizedsub-species; viz. Western red slender loris (L. t. tardigradus), Montane slender loris (L. t.nycticeboidesi, Northern grey slender loris (L. 1.nordicusi, and Highland slender loris (L. 1.grandis).The objective of this survey was to map the distribution and estimate the abundance of lorises in SriLanka. The study was initiated in 2002 and continues to date. Thus far forty-five sites across all ofthe ecological zones have been surveyed covering approximately 400 krn-. In six of these sites, loriseswere not recorded. Of the other 39 sites, 223 sightings of slender loris (L. t. tardigradus (n = 86), L.t. nycticeboides (n = 3), L. 1. nordicus (n = 122), and L. l. grandis (n = 12). Abundance estimates, 'base on sightings of animals krn', were: L. t. tardigradus (0.5-8), L. t. nycticeboides (0.03), L. I.nordicus (0.7-13). and L. 1. grandis (0.3-4) were recorded. The abundance of lorises varied indifferent habitat types with the highest abundance oflorises occurring in the dry zone monsoon forests.The least abundance of lorises was recorded in the cloud forest

AGRO·FORESTRY HOME·GARDENS IN KALUTARA DISTRICT A PARTICIPATORY RURAL APPRAISAL (PRA)

Promotion of agro-Iorestry in home-gardens has been greatly emphasized as a nationalpriority. in the new amendments of forest-policy in Sri Lanka. Further, development ofhomestead gardens is one of the major component or the Participatory Forestry Project ofthe Forest Department. Evidently, the home gardens contribute a substantial amount offood, timber, fuel-wood, fodder etc., of the country. In most of these home-gardens, thecanopy cover is dense with a closure of over 75 percent.The total extent of land under the home-gardens in Kalutara District has significantlydecreased during the last decade. However, the remaining home-gardens are a majorsource of food. timber, and fuel-wood required for household consumption. Moreover,exportable products of the perennial agricultural crops, and fruits required to cater theincreasing demand in the tourism are becoming attractive sources of income from the agroforestryhome-gardens in the district. To improve sustainable agro-Iorcstry home-gardens,an assessment of the present agro-forestry home-gardens in the district is essential.Home centred spatial arrangement in agro-Iorestry reflects different interactions amonghousehold, garden. and gardening as well as socio-economics and indigenous resourcemanagement strategies. Hence, the paper discusses the agro-Iorcstry home-gardens inKal utara district based on the data and information collected through Participatory RuralAppraisal (PRA). The PRA administered the main steps and methods: discussions groupmaps. aggregate maps. wealth runkings, transect walks, participatory transects. venndiagrams. direct matrix, pair-wise ranking and scoring.