OFF‐LINE STORMWATER DETENTION SYSTEMS<sup>1</sup>

Nix, Stephan J.; Durrans, Stéphanie

doi:10.1111/j.1752-1688.1996.tb03501.x

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…In addition, it makes sense from the results that the detention pond algorithm describing multiple outlets (weirs with 2 or more stages) pass more water through the structure at a given time than single stage weir outlet (Figure 4 and Figure 5). In addition, the pattern of detention pond outflow results looks similar to some of the published results from previous studies [12][13][14][15][16]. Therefore, it appears that the developed algorithm for the detention pond is working well.…”

Section: Resultssupporting

confidence: 84%

Hydrologic Modeling of Detentioin Pond

Kannan¹

2014

IJRET

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Urban watersheds produce an instantaneous response to rainfall. That results in stormwater runoff in excess of the capacity of drainage systems. The excess stormwater must be managed to prevent flooding and erosion of streams. Management can be achieved with the help of structural stormwater Best Management Practices (BMPs). Detention ponds is one such BMP commonly found in the Austin, TX, USA. The City of Austin developed a plan to mitigate future events of flooding and erosion, resulting in the development and integration of stormwater BMP algorithms into the sub-hourly version of SWAT model. This paper deals with the development of a physically based algorithm for detention pond. The algorithm was tested using a previously flow-calibrated watershed in the Austin area. From the test results obtained it appears that the detention pond algorithm is functioning satisfactorily. The algorithm developed could be used a) to evaluate the functionality of individual detention pond b) to analyze the benefits of such structures at watershed or higher scales and c) as design tool.

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Section: Resultssupporting

confidence: 84%

Hydrologic Modeling of Detentioin Pond

Kannan¹

2014

IJRET

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“…Triangular inflow hydrograph was used to derive general design equations for detention reservoirs and outlet configurations. [27] proposed an off-line detention pond so that only a portion of the runoff is directed to the basin; the results demonstrated that off-line systems require considerably less storage than in-line systems to achieve the same management goal. [28] used the mathematical model to evaluate alternative storm water detention policies for Montgomery country.…”

Section: Methods Of Sizing the Detention Pondmentioning

confidence: 99%

Mitigating Post Development Flood Using Best Management Practices: A Study of Detention Pond

2018

International Journal of Research in Geography

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The main objective of this study is to analyze and calculate the hydrological benefit of providing onsite detention pond for sub catchment Mahiminside Mithi River watershed. The Mithi River watershed is one of the most developed regions in India with the rapid urbanization which serves as an excellent case study site for proving the benefit of detention pond. SWMM 5.1 software has been used to simulate the model and to evaluate the result. The detention pond was found very effective to reduce the peak of flood and to postpone its time of occurrence. The size of detention pond with varying configuration of weirs/orifice plays vital role in flood management. The result obtained shows that (1) the onsite detention of rainwater can reduce the peak flood and can increase its time to occurrences; (2) peak flow is approximately reduced by 52% and its time of occurrence increase by 180 minutes, respectively; (3) analysis of results shows that successive events of rainfall can exaggerate the flood. In conclusion, detention pond with other best management practices will be very useful. The study suggested that more attention must be given for flood mitigation and water resources management in planning future urban development in the region.

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“…As shown, these standard deviations tended to be higher with respect to Sump C removals, corresponding to the higher absolute values of sampled concentrations and standard deviations at the outfall stations in Sump C. Nevertheless, the results illustrate the contrast between the variable hydraulic characteristics of the respective sumps, and suggest that the relatively simple methodologies proposed here provide a rational approach for estimating difficult-to-measure nonpoint source pollutant transport in urban watersheds. The performance of flood control sumps can be evaluated alongside other alternatives for stormwater detention to facilitate formulation of an integrated strategy for local or regional stormwater management (Nix and Durrans, 1996). Attending issues for which the proposed approach may also prove useful include estimating reaction rate parameters for pollutant loss processes in the sumps, acquiring estimates of stormwater pollutant loads per unit area for specific pollutants, and determining whether these can be meaningfully correlated with system parameters such as the nature of the runoff event and land use patterns for predictive purposes.…”

Section: Nonpoint Pollutant Analysismentioning

confidence: 99%

MANAGEMENT OF FLOOD CONTROL SUMPS AND POLLUTANT TRANSPORT¹

Smith¹,

Abumaizar²,

Skipwith³

2001

J American Water Resour Assoc

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Levee sump systems are used by many riverine communities for temporary storage of urban wet weather flows. The hydrologic performance and transport of stormwater pollutants in sump systems, however, have not been systematically studied. The objective of this paper is to present a case study to demonstrate development and application of a procedure for assessing the hydraulic performance of flood control sumps in an urban watershed. Two sumps of highly variable physical and hydraulic characteristics were selected for analysis. A hydrologic modeling package was used to estimate the flow hydrograph for each outfall as part of the flow balance for the sump. To validate these results, a water balance was used to estimate the total runoff using sump operational data. The hydrologic model calculations provide a satisfactory estimate of the total runoff and its time-distribution to the sump. The model was then used to estimate pollutant loads to the sump and to the river. Although flow of stormwater through a sump system is regulated solely by flood-control requirements, these sumps may function as sedimentation basins that provide purification of stormwater. A sample calculation of removals of several conventional pollutants in the target sumps using a mass balance approach is presented. (KEY TERMS: flood-control sumps; modeling; nonpoint source pollution; stormwater management; urban hydrology; water quality.)

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OFF‐LINE STORMWATER DETENTION SYSTEMS¹

Cited by 6 publications

References 7 publications

Hydrologic Modeling of Detentioin Pond

Hydrologic Modeling of Detentioin Pond

Mitigating Post Development Flood Using Best Management Practices: A Study of Detention Pond

MANAGEMENT OF FLOOD CONTROL SUMPS AND POLLUTANT TRANSPORT¹

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OFF‐LINE STORMWATER DETENTION SYSTEMS1

Cited by 6 publications

References 7 publications

Hydrologic Modeling of Detentioin Pond

Hydrologic Modeling of Detentioin Pond

Mitigating Post Development Flood Using Best Management Practices: A Study of Detention Pond

MANAGEMENT OF FLOOD CONTROL SUMPS AND POLLUTANT TRANSPORT1

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Product

Resources

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OFF‐LINE STORMWATER DETENTION SYSTEMS¹

MANAGEMENT OF FLOOD CONTROL SUMPS AND POLLUTANT TRANSPORT¹