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Water Science & Technology Vol 67 No 3 pp 675–681 © IWA Publishing 2013 doi:10.2166/wst.2012.614

Laboratory analysis of the infiltration capacity of interlocking concrete block pavements in car parks

Luis A. Sañudo-Fontaneda, Jorge Rodriguez-Hernandez, Angel Vega-Zamanillo and Daniel Castro-Fresno

Construction Technology Research Group (GITECO), Dept of Transport, Project and Process Technology, ETSICCP, Universidad de Cantabria, 39005 Santander, Spain E-mail: sanudola@unican.es
Highways Research Group (GCS), Dept of Transport, Project and Process Technology, ETSICCP, Universidad de Cantabria, 39005 Santander, Spain


ABSTRACT

Interlocking concrete block pavements (ICBPs) have been widely used in car parks to reduce runoff. Researches have demonstrated that clogging is the most influential factor in the reduction of the infiltration capacity of this type of permeable pavement. Nevertheless, there is no laboratory study of the infiltration performance of ICBPs that combines clogging levels with variables related with the topography of car parks such as runoff surface length (RSL) and surface slope (SS). This paper studies the infiltration behaviour of ICBP during their operational life in a car park using an improved version of the Cantabrian Fixed (CF) Infiltrometer. This laboratory device simulates direct rainfall and runoff from adjacent impervious areas over an ICBPs surface of 0.25 m2 for different slopes (0, 3, 5, 7 and 10%) and three scenarios of clogging (surface newly built, surface clogged and surface clogged with maintenance). This paper presents the results of the tests and a statistical analysis based on three regression models (corresponding to each clogging scenario) depending on the RSL and SS variables. All models passed a confidence level of 95%, presenting high R2 values and showing that RSL is a more influential variable than the SS for all clogging scenarios.

Keywords: best management practice; clogging; permeable surfaces; statistical analysis; stormwater; sustainable urban drainage systems


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