Design and routing of storm flows in an urbanized watershed without surface streams

Schaad, David E.; Farley, J.T.; Haynes, Criss

doi:10.1016/j.jhydrol.2009.06.028

Cited by 3 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main objective of designing the storage facility is to reduce the peak fl ow [1,3] and volume of runoff generated as a result of land use modifi cation and to provide water quality treatment. The basic policy that guides the stormwater management design is the peak fl ow, after development, is required not to exceed the pre-development level for one or more design storms with a given return period and storm duration [4,5]. The guideline of many regulatory agencies for a pond located in a closed basin is even more stringent and requires retaining all runoff within the basin [6].…”

Section: Introductionmentioning

confidence: 99%

“…The effi cient sizing of wet detention ponds using design curves (that relates capture volume and treatment effi ciency) generated by extended simulation results using the SWMM4 model were examined [2]. Design and fl ow routing of ponds or depressions in karst geologic formations were analyzed [4,9]. These studies examined the fl ow routing of ponds and the attenuated fl ow is fi nally discharged either in downstream watercourse, streams or in sinkholes that are assumed to have unlimited available storage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Minimizing pond size using an off-site pond in a closed basin: a storm flow mitigation design and evaluation

Ahmad¹,

Miller²,

George³

2014

Int. J. SDP

View full text Add to dashboard Cite

Construction of large on-site detention pond to manage the stormwater runoff in the project area is not only expensive, but also a waste of developable land. To minimize the pond size, a systematic design of storm fl ow routing followed by model verifi cation is necessary. This study presents a challenging stormwater management design for a site located in a complex urban setting at Tallahassee, Florida, USA. The site, a 4.6-hectare (11.4 acre) wooded area, was developed into a swimming pool complex resulting in increased post-development runoff. This increased runoff was managed by designing an on-site pond, minimized by placing it in series with an existing downstream off-site pond of a closed basin. The available storage of the downstream pond was effi ciently used to reduce the upstream pond size. To minimize the on-site pond, the design considered rearrangement and re-sizing of pre-development basins that allowed releasing some portion of post-development runoff below its pre-development level in the directions where it was allowed to drain. The excess runoff generated from the area was routed through the on-site pond and discharged into the existing off-site pond, where all runoff was retained to meet the guidelines of a closed basin. The short duration simulation results (8-hr and 24-hr design storms) confi rmed signifi cant off-site runoff reduction for the postdevelopment condition. Besides short duration simulations, the extended simulation results (for the entire 1-yr period) also revealed that the on-site and off-site ponds can jointly manage all extreme runoff including the runoff of a historical extreme wet year.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Minimizing pond size using an off-site pond in a closed basin: a storm flow mitigation design and evaluation

Ahmad¹,

Miller²,

George³

2014

Int. J. SDP

View full text Add to dashboard Cite

show abstract

“…Therefore, urban storm water management models are widely recognized as useful tools for urban planning and design to avoid any adverse impact at the downstream of the project area [5]. Many state or regulatory agencies require the design to attenuate the post-development peak flow to predevelopment level for one or more design storms with a given return period and storm duration [6]. The guideline for closed basin is even stricter and requires the basin to retain all runoff.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a storm flow management design to contain runoff within the watershed using ponds in series

Ahmad¹,

Miller²

2011

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

In a closed basin, where runoff is not allowed to discharge outside the watershed, a systematic design of storm water routing with retention facility is necessary to manage the runoff. This article presents a successful design to route the excess runoff generated due to the change in land-cover from an 11.4 acre site in Tallahassee, Florida, USA. The site development involved conversion of a wooded area to an aquatics complex with pools, buildings, parking lots, and driveway access etc. creating 2.4 acre impervious area. A pond with adequate storage capacity was not feasible to construct within the site due to site constraints and high-cost. The runoff generated from the new impervious area was designed to route through the newly designed small onsite dry-detention pond and discharged to an existing offsite pond, located within a closed basin. The analysis showed successful design of an onsite pond that retains as much water as possible within the site and safely releasing excess volume downstream to the offsite pond. The results confirmed that the offsite pond in the closed basin can retain all runoff without any discharge and the two ponds in series can handle any extreme storm in an integrated manner.

show abstract

Stormwater Management Modelling for Ungauged Watershed in Matara Municipality

Harshani¹,

Wijesekera

2011

Engineer

View full text Add to dashboard Cite

Most urban areas are having flood problems due to human activities. It is not easy to model urban watersheds since very often they are ungauged. This paper describes the modelling of an ungauged watershed in the Matara Municipal Council Area of Southern Sri Lanka using the free SWMM5 model of the EPA. Several field visits were conducted to capture the model parameters and flood scenario for model development and calibration. The watershed delineation was done using 1:10,000 topographic maps and canal slopes etc were determined using the elevation data of these maps. This watershed with an area of 1.12 km 2 was modelled and calibration was done for the order of magnitude of the outputs. The model shows reasonable results with the actual conditions in the absence of gauge data This work demonstrates that urban stormwater model SWMM5 can be used in Matara Municipal Council area to a satisfactory level with adequate field data collection. However, for accurate results, it is necessary to suitably gauge the stream flows and carry out field and engineering surveys for the measurement of physical parameters. The model demonstrated the capability to identify engineering and stormwater management options. Model outputs revealed that cleaning of canals was one option for reducing the flooding at nodes. For the considered storm, a reduction of canal roughness from 0.2 to 0.015 reduced the flood peak by 56% and no flood is happening after introducing a rectangular detention unit which is having 200m 2 floor area.

show abstract

Design and routing of storm flows in an urbanized watershed without surface streams

Cited by 3 publications

References 14 publications

Minimizing pond size using an off-site pond in a closed basin: a storm flow mitigation design and evaluation

Minimizing pond size using an off-site pond in a closed basin: a storm flow mitigation design and evaluation

Evaluation of a storm flow management design to contain runoff within the watershed using ponds in series

Stormwater Management Modelling for Ungauged Watershed in Matara Municipality

Contact Info

Product

Resources

About