An analysis of pavement heat flux to optimize the water efficiency of a pavement-watering method

Hendel, Martin; Colombert, Morgane; Diab, Youssef; Royon, Laurent

doi:10.1016/j.applthermaleng.2014.11.060

Cited by 49 publications

(59 citation statements)

References 17 publications

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“…Street surface temperatures were investigated on rue du Louvre, near Les Halles in the 1 st and 2 nd Arrondissements in Paris, France over the summer of 2013. Measurements were collected during the same experiment as that described by Hendel et al [3]. Watered and control weather station positions are illustrated in Figure 1, however only data from the watered site will be studied.…”

Section: Methodsmentioning

confidence: 99%

“…The surface temperatures of three street areas were surveyed as illustrated in Figure 2 (left): pavement zone 1, located above the pavement sensor used in the parent analysis [3], pavement zone 2, located further towards the street's center and a sidewalk zone. All three had an emissivity of 0.97 despite different surface composition and texture.…”

Section: Instrumentsmentioning

confidence: 99%

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Improving a pavement-watering method on the basis of pavement surface temperature measurements

et al. 2014

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Published in Urban ClimatePavement-watering has been studied since the 1990's and is currently considered a promising tool for urban heat island reduction and climate change adaptation. However, possible future water resource availability problems require that water consumption be optimized. Although pavement heat flux can be studied to improve pavement-watering methods (frequency and water consumption), these measurements are costly and require invasive construction work to install appropriate sensors in a dense urban environment. Therefore, we analyzed infrared camera measurements of pavement surface temperatures in search of alternative information relevant to this goal. Firstly, surface temperature reductions of up to 4°C during shading and 13°C during insolation were found. Secondly, the infrared camera successfully detected temperature spikes indicative of surface drying and can therefore be used to optimize the watering frequency. Measurements made every 5 min or less are recommended to minimize relevant data loss. Finally, if the water retaining capacity of the studied pavement is known, optimization of total water consumption is possible on the sole basis of surface temperature measurements

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Section: Methodsmentioning

confidence: 99%

Section: Instrumentsmentioning

confidence: 99%

Improving a pavement-watering method on the basis of pavement surface temperature measurements

et al. 2014

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“…The city of Paris launched an experimental study focused on the estimation of the impact of the watering of sidewalks and roads during summer days (Hendel et al, 2015(Hendel et al, , 2016. This experiment (Fig.…”

Section: Observations Databases and Data Sharingmentioning

confidence: 99%

Integrated urban services: Experience from four cities on different continents

et al. 2020

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A B S T R A C TRapid urbanization combined with climate change necessitates new types of urban services that make best use of science and technology. The Integrated Urban Hydro-Meteorological, Climate and Environmental Services and systems are a new initiative from the World Meteorological Organization (WMO) that seeks to provide science-based integrated urban services supporting safe, healthy and resilient cities. Various cities have already started development and implementation of such Integrated Urban Services and successfully test and use them following specific requirements of local stakeholders. This paper demonstrates the novel concept and approach of Integrated Urban Hydro-Meteorological, Climate and Environmental Services (IUS) from a set of four case study cities: Hong Kong, Toronto, Mexico City and Paris, that use different IUS configurations with good existing practice. These cities represent a range of countries, climates and geophysical settings. The aggregate main joint similarities of the IUS in these cities and synergy of the cities' experience, achievements and research findings are presented, as well as identification of existing gaps in knowledge and further research needs. A list of potential criteria for identifying and classifying IUS demonstration cities is proposed. It will aid future, more detailed analysis of the IUS experience, and selection of additional demonstration cities. Introduction to urban data and services needsUrbanization is an ongoing phenomenon and a growing number of urban settings are particularly vulnerable to weather and climate events, including floods, storms, heat waves, sea-level rise and poor air quality. In addition, urban dwellers are the primary users of energy and resources, and contribute in a significant way to increasing atmospheric greenhouse gasses as well as air pollution. These alterations to the atmosphere from urban to global scales have consequent impacts on human health and the environment. But the urban setting also provides exciting opportunities for scientific advancement in the field of new observations, data assimilation, high resolution coupled modeling and user-specific systems and services for sustainable and climate smart cities.Most (90%) of the disasters affecting urban areas are of a hydro-meteorological nature and these have increased due to climate https://doi.

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“…Pavement surfaces can be modelled as semi-impervious surfaces (Dupont et al, 2006 [18]) or as impervious surfaces (Herb et al, 2008 [19]; Hendel et al, 2015 [10]). In the first case, downward infiltration should be taken into account whereas the proportion of infiltrated water in the second case is supposed negligible compared with the one that runs-off or evapourates.…”

Section: Solene-microclimat Soil Modelmentioning

confidence: 99%

“…asphalt), we will consider our surface as impervious. Overall the watering model needs to take into account two fluxes initially not considered in Equation 1: a runoff convective heat flux density exchanged between the surface and the water (Q wat´pav ) and a latent heat flux density (LE) between the water and the atmosphere (Herb et al, 2008 [19]; Hendel et al, 2015 [10]). The resulting surface energy balance is then given by Equation (2).…”

Section: Solene-microclimat Soil Modelmentioning

confidence: 99%

A pavement-watering thermal model for SOLENE-microclimat: Development and evaluation

et al. 2018

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In a dense urban area, pavement watering could be a solution to mitigate the Urban Heat Island. So far, mainly experimental studies have been used to evaluate watering techniques. In this study, a soil model dedicated to pavement watering has been developed within the urban climate model SOLENE-Microclimat. This watering model is presented and evaluated via a measurement campaign performed on an asphalt car park during warm days. The measurement campaign reveals that the surface cooling is mainly due to evaporation (80%). However, under warm conditions, the heat flux exchanged between the runoff water and the surface should also be modelled. Indeed, watering events are modelled through a runoff convective heat flux and a latent heat flux. The mean daily RMSE between estimated and observed surface temperature is 1.04 o C, 0.86 o C, 0.66 o C, 0.35 o C and 0.21 o C

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An analysis of pavement heat flux to optimize the water efficiency of a pavement-watering method

Cited by 49 publications

References 17 publications

Improving a pavement-watering method on the basis of pavement surface temperature measurements

Improving a pavement-watering method on the basis of pavement surface temperature measurements

Integrated urban services: Experience from four cities on different continents

A pavement-watering thermal model for SOLENE-microclimat: Development and evaluation

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