Quantifying mobile and immobile zones during simulated stormwater infiltration through a new permeable pavement material

We have designed a new eco-material for use in permeable pavements in view to ensuring the sustainable management of stormwater in urban areas. The specific characteristic of this material is that it allows the infiltration of rainfall, storing the infiltrated water and trapping the pollutants carri...

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Bibliographic Details
Published in:Environmental technology 2015-03, Vol.36 (5), p.628-637
Main Authors: Bentarzi, Y, Ghenaim, A, Terfous, A, Wanko, A, Poulet, J.B
Format: Article
Language:English
Subjects:
compost
composts
concrete
Construction Materials
crushed concrete
Drainage, Sanitary
environmental technology
equations
Fluid mechanics
heavy metals
Heterogeneity
Hydrodynamics
Infiltration
Mathematical analysis
Mechanics
Models, Theoretical
oils
permeable pavement
Physics
Pollutants
pollution
preferential flow
rain
Rainfall
Stormwater
stormwater management
Trapping
Urban areas
wastes
water flow
Water Purification - instrumentation
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Summary:We have designed a new eco-material for use in permeable pavements in view to ensuring the sustainable management of stormwater in urban areas. The specific characteristic of this material is that it allows the infiltration of rainfall, storing the infiltrated water and trapping the pollutants carried by runoff such as engine oil and heavy metals. This new material is composed of a mixture of crushed concrete , resulting from inert construction waste, and organic material (compost). We performed tracing experiments in view to monitor the flow of the water within this material in order to study its hydrodynamics under heavy rainfall (rain with a return period of 10 years). The experimental results revealed preferential flows due to the heterogeneity of the material and liable to act as a major vector for the mobility of the pollutants transported within the material by stormwater. The work presented in this article consists in quantifying these preferential flows by determining their water contents in mobile (θ ₘ) and immobile (θ ᵢₘ) water during infiltration. To do this, we used the (NON-EQUILIBRIUM Convection–Dispersion Equation) model, in order to evaluate mobile and stagnant zones in the framework of tracing experiments.
ISSN:1479-487X
0959-3330
1479-487X
DOI:10.1080/09593330.2014.954630