“Optimisation of canyon orientation and aspect ratio in warm-humid climate: Case of Rajarhat Newtown, India”

De, Bhaskar; Mukherjee, Mahua

doi:10.1016/j.uclim.2017.11.003

Cited by 56 publications

(25 citation statements)

References 42 publications

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“…Canyon axis orientation is one of the important factors affecting the thermal environment of a street as observed in several studies in warm humid and other climates (De and Mukherjee 2018;Kakon et al 2010;Ndetto and Matzarakis 2013;Rodríguez-Algeciras et al 2016Zhang et al 2017). A simulation study by in Colombo, Sri Lanka, showed that for H/W ratios below 0.6, the influence of street orientation is marginal.…”

Section: Effect Of Canyon Axis Orientation On Outdoor Thermal Comfortmentioning

confidence: 99%

“…Since high H/W ratios decrease the daytime temperature but increase the nocturnal air temperature, Johansson and Emmanuel (2006) pointed out that appropriate H/W ratios depend on the type of the neighbourhood, as a higher nocturnal temperature may be more acceptable in commercial areas than in residential ones. Several studies (De and Mukherjee 2018;Kakon et al 2010;Zhang et al 2017) have found that an increase in aspect ratio leads to a reduction of PET and consequently a decrease of thermal discomfort although it is difficult to bring it down within the comfort range at 2:00 pm.…”

Section: Effect Of Aspect (H/w) Ratio On Outdoor Thermal Comfortmentioning

confidence: 99%

“…concluded that to achieve a noticeable improvement in outdoor thermal comfort in the climate of Colombo, east-west streets would need to be very deep, at least H/W = 4, whereas north-south-oriented streets would need to have an H/W ratio of at least 2. In Rajarhat Newtown, India, De and Mukherjee (2018) found that optimizing the orientation and canyon aspect ratio might reduce the thermal discomfort by a reduction of PET values of 5-10°C during the most critical period of the day.…”

Section: Effect Of Canyon Axis Orientation On Outdoor Thermal Comfortmentioning

confidence: 99%

“…In the humid subtropical regions, for example, studies by Assis and Frota (1999), Johansson et al (2013), Kakon et al (2009), Kakon et al (2010), Lin et al (2010), Sharmin et al (2015), Tan et al (2017), Yang et al (2011) and Yang and Lin (2016) are available. In the tropical rainforest regions, examples of studies include those of Emmanuel and Johansson (2006), Emmanuel et al (2007), Johansson and Emmanuel (2006) and Qaid and Ossen (2015), and, in the tropical savannah regions, studies of De and Mukherjee (2018), Ndetto and Matzarakis (2013), Rodríguez-Algeciras et al (2016) and Yahia et al (2018) exist. Most of these studies investigate the formal urban fabric of the cities characterised by a designed and coordinated pattern of streets that are different from the informal urban fabric.…”

Section: Introductionmentioning

confidence: 99%

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Review of studies on outdoor thermal comfort in warm humid climates: challenges of informal urban fabric

2019

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In warm humid climate regions where majority of the population spend most of the time outdoors, an adequate outdoor thermal environment is crucial. A number of studies on outdoor thermal comfort in warm humid climates were carried out in the past decade. However, most of these studies focused on the formal urban fabric and left the informal urban fabric, where typically 30 to 85% of the population in developing countries resides, unattended. Theoretically, the informal urban fabric structure of towns/ cities poses many outdoor thermal environmental challenges, such as lack of air movement, high thermal stress and discomfort. This paper reviews previous research on outdoor thermal comfort in warm humid climates, and, particularly, it focuses on the relationship between outdoor thermal comfort and urban fabric as well as human thermal perception. Regarding the formal urban fabric, this review asserts that the thermal comfort range is higher in warm humid climates than in temperate climates and that thermal indices alone cannot predict thermal comfort; behavioural and psychological adaptation have proven to have a big impact on thermal perception. As for the informal urban fabric, only few studies have investigated the influence of the urban geometry and none has studied people's thermal perception of the outdoor thermal environment. To conclude, the article highlights practical challenges posed by the informal urban fabric in contrast to the formal urban fabric in terms of structure (morphology). Keywords Outdoor thermal comfort. Warm humid climates. Thermal indices. Informal urban fabric. Informal settlements. Acceptable index temperature limits * Modest Maurus Baruti

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Section: Effect Of Canyon Axis Orientation On Outdoor Thermal Comfortmentioning

confidence: 99%

Section: Effect Of Aspect (H/w) Ratio On Outdoor Thermal Comfortmentioning

confidence: 99%

Section: Effect Of Canyon Axis Orientation On Outdoor Thermal Comfortmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Review of studies on outdoor thermal comfort in warm humid climates: challenges of informal urban fabric

2019

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“…Canyon geometry can always be defined by several parameters, such as the basic value of the aspect ratio or height-to-width ratio (H/W), street orientation, the influence of Sky View Factor (SVF), and other descriptive indicators (building layout, and so on). Building orientation and street orientation can effectively improve the urban thermal environment [26,27,28]. Urban space height composition and agglomeration development mode have an important impact on residential daytime temperature [29,30].…”

Section: Introductionmentioning

confidence: 99%

Microclimatic Impact Analysis of Multi-Dimensional Indicators of Streetscape Fabric in the Medium Spatial Zone

Jiang

Han

Shi

et al. 2019

IJERPH

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Different historical backgrounds and planning ideas have created different urban streetscape fabrics. The patterns of the streetscape fabric have affected urban microclimate factors and formed a unique local microclimate. This paper simulated the microclimatic effects in four study areas with different streetscape fabrics in Shanghai to compare the microclimatic conditions with a system of multi-dimensional street morphological indices using ENVI-met 4.3 software. At the street network fabric level, the results showed that streets with a south–north orientation, a small junction spacing, and a street network with better connectivity were conducive to mitigation of the air temperature heating intensity in the street space and improving the ventilation effect; at the street-site level: The indices of Build-to-line ratio (BL), Height-width ratio (H/W), and Sky view factors (SVF) played different roles that affected the distribution characteristics of the microclimate factors. The BL value of the streets between 0.5 and 0.8 generally had a positive relationship with the air temperature. The SVF value of the streets was positively correlated with the microclimate index, while the H/W values were negatively correlated with them. The morphological indicators of different levels also had a synergistic effect on the microclimatic impact of the street space fabric. This comparative analysis of microclimatic characteristics at the medium spatial scale will provide useful suggestions for urban climate adaptability in urban spatial morphology optimization in future urbanization development.

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Improving Accessibility to Urban Blue-Green Spaces: A Case of Howrah, India

Dey,

Gupta,

et al. 2024

Sustainable Development and Geospatial Technology

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“Optimisation of canyon orientation and aspect ratio in warm-humid climate: Case of Rajarhat Newtown, India”

Cited by 56 publications

References 42 publications

Review of studies on outdoor thermal comfort in warm humid climates: challenges of informal urban fabric

Review of studies on outdoor thermal comfort in warm humid climates: challenges of informal urban fabric

Microclimatic Impact Analysis of Multi-Dimensional Indicators of Streetscape Fabric in the Medium Spatial Zone

Improving Accessibility to Urban Blue-Green Spaces: A Case of Howrah, India

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