Comparison the monitoring data of an on-site stormwater detention (OSD) and the results in the use of theoretical methods for its design

Drumond, Pedro de Paula; Moura, Priscilla Macedo; Coelho, Márcia Maria Lara Pinto

doi:10.1590/2318-0331.231820170149

Cited by 7 publications

(5 citation statements)

References 4 publications

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“…Improvement is needed to lower the field dataset so that no near or exceeding of maximum tank capacity to occur. This observation is similar to the finding of [15] that stresses the importance of field monitoring to validate the design data.…”

Section: Figure 6 Detention Volumes According To Observed Rainfall Dsupporting

confidence: 89%

Evaluating the Efficiency of Household Stormwater Detention System

Ngu

Mah

Taib

et al. 2021

AEJ

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This paper describes the evaluation of water storing capacity of a household stormwater detention system based on field data. Collection of field data is often sidelined due to the cost and human capital incurred. However, the true value of field data is demonstrated here by comparing the observed and design data. A field test is completed in a real-life terrace house, utilizing the house’s 95m2 side canopy as roof catchment and 4.40m x 4.70m car porch area to station a detention tank. Precast concrete modular units with 3.9m3 effective storage volume are assembled within the tank. Downpipe with 0.1m diameter is installed to connect the roof gutter to the detention tank; while pipeline with 0.05m diameter is installed as the outlet from tank to the house perimeter drain. The mentioned setup is subjected to actual rainfalls from December 2019 till February 2020 that corresponded with the peak of Northeast Monsoon season. Ten observed storm events with peak hourly total rainfall readings ranging from 22 to 48mm are selected for analysis. Rainfall and water level readings from the field test allow the derivation of roof runoff volume and detained water volume in the tank. It is found that the household stormwater detention system is able to capture about 50% of the roof runoff. However, the current setup is found to cause flooding for rainfall over 40mm. The flooding issue, however, is undetected by the design data that underestimated the water storing capacity. This is due to the use of uncommon precast concrete modular units that may not have its flow characteristics represented by existing formula and model. No matter how uncommon the modular units be, various types and forms of stormwater detention system are becoming the new normal in the industry and field test is the best tool to validate their performances.

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Section: Figure 6 Detention Volumes According To Observed Rainfall Dsupporting

confidence: 89%

Evaluating the Efficiency of Household Stormwater Detention System

Ngu

Mah

Taib

et al. 2021

AEJ

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“…In other studies Drumond et al [17], they conducted research on the water flow characteristics in an urban system in which on-site reservoirs were used. They showed that the analyses based on the common rational method differ significantly from the real flows in systems containing this type of devices.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Hydraulic Efficiency of a Steerable Detention Tank—Simulation Studies

Pochwat

Pizzo

2022

Hydrology

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The article contains the results of the first part of the research on the analysis of the operation of the retention device cooperating with the drainage system—steerable detention tank and concerns model simulation studies. The obtained results are an introduction to conducting laboratory tests. The planned research was carried out on the basis of the theory of experimental planning and hydrodynamic modelling, in which the systems of hydraulic parameters of the drainage system and hydrological of the catchment were selected. In total, over a thousand hydrodynamic simulations were carried out using SWMM 5.1. The planned analyses had two main goals. Firstly, to verify the possibility of reducing the rainwater volume flow in the drainage system by means of controllable devices enabling cooperation with the drainage system in various hydraulic conditions of the drainage system. Secondly, determining the impact of the connection method (parallel or serial) of the device enabling retention and cooperation with the sewage system on the efficiency of the system. The conducted analyses showed that the use of a retention device cooperating with the drainage system may significantly reduce the amount of sewage outfall from system, depending on the capacity of a single micro-accumulator, even up to 83% (in the analysed data range). It was also shown that the method of connecting the device to the network has an influence on the efficiency of the system in depend on hydraulic conditions.

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“…Piel et al (1999) have found that the lack of maintenance is the main cause for low performance of OSD. Drumond et al (2018) monitored two OSDs built in Belo Horizonte and compared the maximum water levels data with theoretical simulations. The results showed that theoretical simulations presented lower values than those monitored.…”

Section: Introductionmentioning

confidence: 99%

Are the current On-site Stormwater Detention (OSD) policies the best solution for source control stormwater management? A case study of Australian and Brazilian cities

Drumond

Ball

Moura

et al. 2020

Urban Water Journal

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In recent decades On-site Stormwater Detention (OSD) systems have been implemented in many cities around the world. However, a few studies have evaluated the effectiveness of OSD policies. Therefore, this paper compared the use of OSD in Australian and Brazilian cities, evaluating aspects of regulations, technical details and management matters. The results showed that Australian OSD design guidelines are a few steps ahead of Brazilian manuals. However, it is not possible to affirm that the catchment-based approach, adopted by most Australian councils, is better than the site-based approach, embraced by Brazilian cities, since neither is supported by monitoring data of real OSD performance. In general, all municipalities have the same management problems. There is no control over the number of OSDs built in the cities or even the conditions of the systems. Thus, the authors proposed some directions on how OSD performance could be better evaluated.

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Comparison the monitoring data of an on-site stormwater detention (OSD) and the results in the use of theoretical methods for its design

Cited by 7 publications

References 4 publications

Evaluating the Efficiency of Household Stormwater Detention System

Evaluating the Efficiency of Household Stormwater Detention System

Analysis of the Hydraulic Efficiency of a Steerable Detention Tank—Simulation Studies

Are the current On-site Stormwater Detention (OSD) policies the best solution for source control stormwater management? A case study of Australian and Brazilian cities

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