Extending Retention Times in a Stormwater Pond with Retrofitted Baffles

Matthews, R.R.; Watt, W. E.; Maršálek, Jiří; Anderson, Bruce; Crowder, Adèle A.

doi:10.2166/wqrj.1997.006

Cited by 17 publications

(2 citation statements)

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“…Despite natural succession towards decreased efficiency, changes can be made to the physical components of the wetland to influence flow, increase effective treatment volume and therefore improve wetland performance (Matthews et al 1997, Dierberg et al 2005, Su et al 2009. Exclusion zones are arguably the easiest factor to control, through the manipulation of wetland morphology.…”

Section: Discussionmentioning

confidence: 99%

Calculating the hydraulic efficiency of a constructed wetland

Harrington¹

2019

Water e-journal

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Measurement of the efficiency of constructed wetlands is critical for maintenance of their functions and contribution to improving water quality in urban areas. A fluorescent dye tracer, Rhodamine-WT, was used to track water flow through a stormwater-reliant, free water surface (FWS) constructed wetland in a Mediterranean climate. The mean hydraulic residence time (HRT) was calculated and compared to the design HRT, in order to gain an appreciation of the hydraulic efficiency of the wetland system. The actual HRT (4.0 days) was calculated to be less than the design parameters (7.0 days), giving the system a hydraulic efficiency of 0.57. Water movement was also tracked across the wetland profile to determine movement patterns within the system and identify any areas of short circuiting. A remediation design was then implemented and tested under experimental conditions. The remediation design increased the HRT from 4.0 to 5.6 days. This equates to a hydraulic efficiency of 0.80, which indicates good performance. Improvement to the flow patterns within the wetland was also demonstrated, with the influence of short circuits reduced. Nonetheless, further changes need to be implemented within the wider wetland area to encourage even distribution of water. Wetland processes are highly time dependent, therefore the ability to measure and maintain the efficiency of constructed wetlands is essential. This study demonstrates it is possible to improve the hydraulic residence time of a constructed wetland through changes to vegetation and obstructions to flow. It also demonstrates the benefits of dye tracer studies in tracking the lateral movement of water through the constructed wetland. The use of dye tracers is a costeffective and valuable method to measure the hydraulic parameters of a constructed wetland and should be incorporated into the ongoing management plan for stormwater-reliant free water surface constructed wetlands.

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Section: Discussionmentioning

confidence: 99%

Calculating the hydraulic efficiency of a constructed wetland

Harrington¹

2019

Water e-journal

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“…BMPs engineering practices are defined as such practices which build sediment pond, infiltration pond, porous road, water detention pond and other buildings to control pollution. These methods are effective to control runoff pollution [20][21]. Infiltrating urban rainfall with soil is one of pollution control practices in developed countries.…”

Section: Bmps Of Nps Pollution From Surface Runoffmentioning

confidence: 99%

Loads and Control Methods of Non-Point Source Pollution from Urban Runoff: A Case Study of Xiamen Island

Chen¹

2019

dteees

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Urbanization is the dominant form of land-use change in terms of impacts on water quality, the hydrology, other physical properties of watersheds as well as their potential NPS pollution at present. Urban runoff pollution is a hotspot research on NPS. Urbanization has changed the source, process and sedimentation of urban NPS pollution, especially increased the load of urban runoff NPS in receiving water. This study will analyze the pollutants' type, source and harm of urban runoff NPS pollution and its influence on the receiving water in Xiamen island. While, it analyzes that annual loads of BOD 5, SS, PO 4 -P and TN from urban non-point sources are 56.49 t/yr, 784.12 t/yr, 1.61 t/yr, 7.60 t/yr by USEPA model. The result shows that NPS pollution load of residential area is heavier than any other area in old district. Total NPS pollution load of commercial area is the heaviest except SS of residential area in new district.Through estimating urban runoff NPS pollution load and summarizing the laws and characteristics of urban runoff NPS systemically, the studies of management and control on urban runoff NPS pollution will be focused on application of BMPs (best management practices). It is a new methodology in which the management and control on urban runoff NPS pollution are analyzed by the method of landscape ecology, environmental economics and environmental management. It supplies a scientific reference to mitigate the press-ure of city environment in Xiamen island, and an effective method to manage and control the urban runoff NPS pollution in other cities. 1

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The Kingston Pond: A Case Study of Stormwater Pond Upgrading

Watt¹,

Maršálek

Anderson³

Enhancing Urban Environment by Environmental Upgrading and Restoration

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Extending Retention Times in a Stormwater Pond with Retrofitted Baffles

Cited by 17 publications

References 0 publications

Calculating the hydraulic efficiency of a constructed wetland

Calculating the hydraulic efficiency of a constructed wetland

Loads and Control Methods of Non-Point Source Pollution from Urban Runoff: A Case Study of Xiamen Island

The Kingston Pond: A Case Study of Stormwater Pond Upgrading

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