Dimensioning of Required Volumes of Interconnected Detention Tanks Taking into Account the Direction and Speed of Rain Movement

Abstract

This article is aimed at defining the impact of the direction and velocity of waves of rainfall as they pass over interconnected stormwater detention tank systems. The simulations were conducted for a real urban catchment area as part of the Storm Water Management Model (SWMM) 5.1 programme. The results permit us to conclude that the direction and velocity of a moving wave of rainfall have a significant influence on the required volumes of interconnected stormwater detention tank systems. By comparing the modelling test results for stationary rainfall and rainfall moving over the urban catchment area, it has been demonstrated that differences in the required volume of the detention tank located at the terminal section of a stormwater drainage system are inversely proportional to the adopted value of the diameter of the outfall channel for upstream storage reservoirs. In extreme cases, the differences may be up to several dozen percentage points. Furthermore, it has been proven that the arrangement of the stormwater detention tanks in relation to one another and the adopted diameter of the outfall channel are key factors in identifying the degree to which the detention tanks are hydraulically dependent on one another.

Multi-Objective Optimization for Urban Drainage or Sewer Networks Rehabilitation through Pipes Substitution and Storage Tanks Installation

“…The solution to Scenario 3 shows that some pipes connected to downwards tanks have a reduced diameter, meaning that those pipes act as a hydraulic control device. This confirms what was stated by Starzec et al [4], and opens up the possibility of including hydraulic controls in the optimization process. In this figure, all scenarios provide the same damage costs for no investment.…”

“…• The design storm is supposed to be static and the same for the whole network. Some authors [4] state that static rainfall may produce undersized detention tanks. The design storm and its evolution are beyond the scope of this work.…”

“…The evolution of rainfall also affects the efficiency of drainage networks. Starzec et al [4] suggest that omitting the evolution of Water 2019, 11, 935 2 of 14 storms can led to undersizing the network. Mailhot and Duchesne [5] suggest that the probability of the occurrence of intense rainfall will increase in the future due to the effects of greenhouse gases.…”

An Analysis of the Effectiveness of Two Rainwater Harvesting Systems Located in Central Eastern Europe

“…Besides meeting demand, rainwater harvesting systems can improve rainwater management in urban areas, and a reduction of drained volume and peak flow in sewage systems [21][22][23]. It is very important because the drainage systems are the most capital-intensive type of sewage system [24], and it is necessary to reduce the costs of their construction and functioning by implementing LID (Low Impact Development) practices. Low impact development techniques include mainly decentralized devices and objects, whose operation is to imitate natural hydrological processes, such as infiltration, evaporation, and retention of rainwater, which take place in the catchment.…”

Modelling of StormPav Green Pavement System Using Storm Water Management Model and SolidWorks Flow Simulation

“…By providing an outlet to the container [8], the velocity at the outlet increases, the pressure at the vicinity of the outlet decreases [9]. Thirdly, fluidity of water could flow through wide and tight spaces alike [10]. The multi-compartment nature of StormPav is not a hinder to water flow.…”