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Hydrodynamic Characterization of Sustainable Urban Drainage Systems (SuDS) by Using Beerkan Infiltration Experiments

1
UMR5023 Ecologie des Hydrosystèmes Naturels et Anthropisés, Université de Lyon, 3 rue Maurice Audin, 69518 Vaulx-en-Velin, France
2
Laboratory of Wastes Waters Environment and Pollutions (DEEP), University of Lyon, INSA Lyon, 69621 Villeurbanne, France
*
Author to whom correspondence should be addressed.
Water 2019, 11(4), 660; https://doi.org/10.3390/w11040660
Received: 8 February 2019 / Revised: 27 March 2019 / Accepted: 27 March 2019 / Published: 30 March 2019
(This article belongs to the Special Issue Soil Hydrology for a Sustainable Land Management. Theory and Practice)
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Abstract

Stormwater management techniques in urban areas, such as sustainable urban drainage systems (SuDS), are designed to manage rainwater through an infiltration process. In order to determine the infiltration capacities of different SuDS and to identify their unsaturated hydraulic properties, measurements with the Beerkan method (i.e., single ring infiltration tests) were carried out on four types of common infiltration structures in an urban zone of Lyon (France): A drainage ditch with an underlying storage structure, a parking lot with a waterproof pavement that transfers runoff water toward the ditch, a vegetated hollow core slab, and an embankment of a grass-covered garden that was used as a reference for rainwater infiltration capacity. The novelty of this study lies in the use of three Beerkan estimation of soil transfer parameters (BEST) algorithms: BEST-slope, BEST-intercept, and BEST-steady to analyze infiltration data. The BEST methods are based on the analysis of the infiltration rate from transient to steady-state flow. They allow the determination of both shape and scale parameters of the soil water retention curve h(θ) and the hydraulic conductivity curve K(θ). The three BEST methods are efficient and simple for hydraulic characterization of SuDS. The study of the hydrodynamic behavior of the four structures revealed the infiltration inefficiency of some of them. Their average infiltration rates are considerably lower than the reference infiltration rain garden. The results confirmed the impact of some physical conditions, such as pore structure modification due to invasive vegetation colonization and the presence of soil organic matter, on soil hydrodynamic behavior degradation. View Full-Text
Keywords: infiltration; SuDS; urban runoff; Beerkan; BEST algorithm infiltration; SuDS; urban runoff; Beerkan; BEST algorithm
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bouarafa, S.; Lassabatere, L.; Lipeme-Kouyi, G.; Angulo-Jaramillo, R. Hydrodynamic Characterization of Sustainable Urban Drainage Systems (SuDS) by Using Beerkan Infiltration Experiments. Water 2019, 11, 660.

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