Abstract
The conventional practices of urbanization significantly increase the flooding and water pollution. This is due to reduction in pervious areas. To minimize the problem, various concepts of low impact development have been implemented such as underground bioretention cells. The main intention of this research was to review different aspects of Low Impacts Developments (LIDs) especially bioretention cells and develop a hydraulic model to predict the distribution of runoff throughout the bioretention cell under different scenarios. In this study, the hydraulic simulation model was developed in Matlab in order to attain better understanding of bioretention systems. The hydraulic model was used to investigate the impacts of different design options on the distribution of flows over the entire bioretention cell. Understanding the effect of design options can be beneficial to improve the performance of bioretention systems and improving the water quality and quantity in developed areas.
Highlights
Development in urban areas is a concern in stormwater management and it is well known that urbanization affects the natural processes such as rainfall and runoff
In order to prevent the problems caused by increased imperviousness after urbanization, Low Impacts Developments (LIDs) techniques are implemented which are relatively new and not comprehensively studied
A very important fact about bioretention practices is that they are unlike the traditional and conventional best management practices, which collect the volume of runoff to the end of pipe treatment facilities
Summary
Development in urban areas is a concern in stormwater management and it is well known that urbanization affects the natural processes such as rainfall and runoff. Precipitation from rain and snowmelt generates stormwater runoff over land, parking lots, building rooftops and other impervious surfaces in urbanized areas. These surfaces do not allow water to percolate into soil and will increase the discharge rate and volume of stormwater runoff. All the input parameters and design variables considered in the hydraulic modelling are discussed in detail using a case study located at Queensway Ave. The intensity and duration of a rainfall event happening in an area is relatively indeterminate and unknown until it has been measured locally by a rain gauge.
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