Roadside gully pots are the connecting points between surface runoff and the underground drainage network; therefore they can be considered as the most superficial component of urban drainage systems. Gully pots are supposed to trap particulate matter washed off the catchment surface, but also to collect and convey stormwater into the network. The continuous accumulation of particulate matter results in a progressive loss of the gully pot hydraulic conveyance, thereby increasing the probability of urban flooding during rainstorm events. This study has therefore the objective to determine which variables influence the gully pot capability of retaining solids (efficiency), both experimentally and analytically. Several laboratory tests have been performed on a simple plastic gully pot, with different inflow rates and using both mono and hetero-disperse particle samples. Particular attention has been given to the influence exerted by the way particle settling velocity is expressed: efficiency has been analytically determined by means of multiple settling velocity formulas proposed by various authors and eventually compared to experimental data. Results deriving from the adoption of each single settling velocity formula have been extensively analysed, showing fairly different outcomes.
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Research Article|
January 01 2012
The role of settling velocity formulation in the determination of gully pot trapping efficiency: comparison between analytical and experimental data Available to Purchase
Annalisa Ciccarello;
Annalisa Ciccarello
1DICAM - Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
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Andrea Bolognesi;
1DICAM - Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
E-mail: [email protected]
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Marco Maglionico;
Marco Maglionico
1DICAM - Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
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Sandro Artina
Sandro Artina
1DICAM - Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
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Water Sci Technol (2012) 65 (1): 15–21.
Article history
Received:
April 15 2011
Accepted:
July 18 2011
Citation
Annalisa Ciccarello, Andrea Bolognesi, Marco Maglionico, Sandro Artina; The role of settling velocity formulation in the determination of gully pot trapping efficiency: comparison between analytical and experimental data. Water Sci Technol 1 January 2012; 65 (1): 15–21. doi: https://doi.org/10.2166/wst.2011.775
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