Detention tanks

Detention tanks

Water Resources Engineering

Published in P.K. Jayasree, K Balan, V Rani, Practical Civil Engineering, 2021

In many areas, detention tanks are required to be installed inside a property and are used to temporarily hold rainwater runoff during heavy rains and restrict the outlet flow to the public sewer. This reduces the risk of the public sewer being overburdened during heavy rain. An overflow outlet may also be utilized which connects higher on the outlet side of the detention tank. This overflow would prevent the detention tank from completely filling up. By restricting the flow of water in this way and temporarily holding the water in a detention tank public sewers are far less likely to become surcharged.

Peak flow reduction from small catchments using smart inlets

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Journal Information

Published in Urban Water Journal, 2020

Nils Kändler, Ivar Annus, Anatoli Vassiljev, Raido Puust

For the second option, peak flow reduction by utilising detention tanks needs an additional tank volume up to 1803 m3. This volume is divided between seven sub-catchments. Detention tanks are calculated on the basis of modelling results, setting the objective peak outflow to 0.5 m3/s and calculating consequent volumes needed for excess flow storage. The volumes per catchment are presented in Table 3.

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Peak flow reduction from small catchments using smart inlets