Infiltration capacity of cracked pavements

Abstract

Understanding the hydrological behaviour of urban surfaces is imperative in the design of surface water drainage systems and flood mitigation strategies, as well as for the modelling of groundwater recharge and pollution. This study has examined the hydrological behaviour of cracked impervious surfaces through field infiltration testing and image analysis of the cracks themselves. Infiltration tests were undertaken on a section of concrete slab pavers paving. The results showed that cracks in impervious surfaces allow significant volumes of water to infiltrate through them, with infiltration rates comparable to those found in sands and gravels. Using a regression model, infiltration rates were related directly to crack characteristics obtained from image processing software, thereby enabling the first published quantitative link between percentage cracked area and infiltration capacity. The implications of accounting for this infiltration for surface water management systems are estimated to be in the order of £20 million annually for the construction industry in England.

Accounting for soil moisture in rainfall-runoff modelling of urban areas

“…Through field experiments Wiles and Sharp (2008) showed that infiltration rates were approximately 2 21% for paved surfaces. While Salt and Kjeldsen (2018) demonstrated that infiltration though cracked surfaces can be considerable, with infiltration rates ranging from 0% to 90% values depending on the age of the pavement.…”

Approaches for assessing flows, concentrations, and loads of highway and urban runoff and receiving-stream stormwater in southern New England with the Stochastic Empirical Loading and Dilution Model (SELDM)

“…KTRLine statistics for runoff coefficient statistics, using the impervious fraction runoff coefficient values are lower than the commonly used values, which can be as high as 0.96 for completely impervious areas (Granato, 2010(Granato, , 2013. Field studies show that evaporation and infiltration from paved surfaces commonly reduce the average runoff from such areas by 20 to 30 percent (Ragab and others, 2003;Mansell and Rollet, 2006;Ramier and others, 2006;Wiles and Sharp, 2008;Wanielista and others, 2010;Redfern and others, 2016;Timm and others, 2018;Salt and Kjeldsen, 2019;Rammal and Berthier, 2020). Therefore, the default average values used by SELDM (0.785 or 0.769) are more representative of measured runoff results than higher average runoff coefficient values commonly used in the literature (Granato, 2010(Granato, , 2013.…”

Geotechnical Hazards from Large Earthquakes and Heavy Rainfalls

“…En esta investigación se estudió la influencia de las grietas en la capacidad de infiltración de superficies impermeables, debido a que los pavimentos fisurados tienen una conductividad hidráulica comparable con la de las arenas y otros materiales granulares, ya que las grietas en las superficies impermeables aumentan las tasas de infiltración. [15] Los resultados obtenidos en este artículo de investigación demuestran que las fisuras en superficies impermeables permiten infiltrar a través de ellas volúmenes significativos de agua.…”

“…En el desarrollo de esta investigación se demostró que, al aumentar el ancho de las grietas y el porcentaje de superficie agrietada, la capacidad de infiltración de la superficie aumenta, sin embargo, en hecho de no evaluar el material a colocar en las grietas y el pavimento subterráneo, no se puede establecer el comportamiento definitivo de la estructura de pavimento. [15] c. Influencia de los sedimentos en el rendimiento hidrológico de un pavimento permeable En el análisis realizado en esta investigación, se evalúo la influencia de los sedimentos en el rendimiento hidrológico de un pavimento permeable-Esta investigación se desarrolló en Reino Unido para un periodo de diseño de 10 años. [16] Se considera que los pavimentos desempeñan una función importante entre los sistemas de drenaje urbano sostenible, debido a que, mitiga la escorrentía superficial en las zonas urbanas, además de aportar a la filtración de algunos materiales contaminantes que trae consigo la escorrentía.…”