Author(s)

G. Becciu & A. Raimondi

Abstract

Stormwater detention facilities are important tools for flood control in modern urban drainage systems, since they reduce uncontrolled discharges into receiving water bodies and improve the efficiency of stormwater treatment plants. In their modelling it is important to limit the number and the amount of spills to ensure the maximum efficiency of the storage capacity. In this paper, the overflow probability distribution function from a stormwater detention facility is derived; the possibility of pre-filling of the storage capacity from previous runoff events, that can strongly influence spilled volumes, is considered. Effects of the control variables and of two different regulation rules on resulting expressions are investigated and discussed. Finally, an application to a case study is presented. Keywords: probabilistic analysis, stormwater detention facility, spilled volume, pre-filling, management rule.

Keywords

probabilistic analysis, stormwater detention facility, spilled volume, pre-filling, management rule.