Long Term Monitoring of Detention Tanks - Final Report
ISBN: 1 84057 067 9
Detention tanks are used to upgrade sewer systems and offer several benefits. Present design guidance on these tanks is largely based on theoretical work, laboratory modelling and short- term tank monitroing. There is little information regarding the long- term operation of these structures, even though this information is essential to check the accuracy of current design methodology. Improved design can decrease both construction and operational costs. A number of different types of tank were monitored between November 1992 and February 1996 in order to determine how each serves its catchment, and to provide an archive of data for future assessment. For each tank, information was collected on: depth of fill; sediment depth; catchment rainfall; catchment changes; maintenance, and control device verification. The report gives a number of conclusions on the performance of the tanks which were monitored, and recommends that this data be used to review methods for the hydraulic design of sewer tanks.