Hydrodynamic modeling of the impact of residential rainwater harvesting systems on stormwater runoff and drainage networks

Agnieszka Stec

doi:10.1051/e3sconf/20184500089

Abstract

This paper presents the results of hydrodynamic modeling of urbanized catchment, where rainwater harvesting systems (RWH) was applied. The catchment model was developed in the Storm Water Managment Model program and RWH was simulated as one of the LID practices available in this program - rain barrels (RB). The research was carried out for various rain barrels implementation scenarios (50% -100%) in a single-family housing estate. However, the results of the research showed that the use of rain barrels (RB) to capture rainwater discharged from the roof of buildings was not effective in significantly reducing the outflow of water from the catchment, and thus reducing the occurrence of pressure flows in the analyzed sewage system.

Highlights

The transformation of natural areas into residential, service and industrial ones causes large environmental and hydrological changes [1,2]
The district of Zasanie model developed in the Storm Water Management Model (SWMM) is shown in fig
When analyzing the change in hydrological conditions in the basin, depending on the number of rain barrels used (50% -100%), it was noted that the peak runoff was reduced in the range from 9,7% to 19,8% for scenarios 1 and 3 respectively, in relation to scenario 0

Summary

Introduction

The transformation of natural areas into residential, service and industrial ones causes large environmental and hydrological changes [1,2] These changes have a negative impact primarily on the quantity and quality of rainwater causing an increase in the speed and volume of runoff, a reduction in infiltration, an increased risk of flooding [3], and the hydraulic overload of sewer systems [4]. In order to limit these negative changes, some actions are taken that consist of applying the principle of sustainable development in the aspect of spatial planning and rainwater management These include, primarily objects and devices that reduce and delay the time of outflow of water from the basin through their infiltration and retention [6,7,8,9].

Methods

Findings

Discussion

Conclusion