Detention tanks as a means of urban storm water management

Abstract

Urban storm sewers, be itfor separate or combined systems, are designed (dimensioned) for a specific rainfall intensity, duration and frequency. But, during the life of these sewers, rainfall of different intensities, duration and frequency can occur. Besides new settlements may develop. All these result in exceeding the design discharges of the sewers causingj/ooding. Thus, in this paper, some means of reducing -such risks are indicated. In particular, the application and design principles of storm water detention tanks is presented. The general principles of dimensioning sewers is also described. In order to elaborate and for better understanding, a simplified illustrative example of dimensioning a storm water detention tank is worked out.