Opin vísindi

Impact of Wind on Stormwater Pond Particulate Removal

Impact of Wind on Stormwater Pond Particulate Removal


Titill: Impact of Wind on Stormwater Pond Particulate Removal
Höfundur: Andradóttir, Hrund Ólöf
Útgáfa: 2017-08
Tungumál: Enska
Umfang: 04017027
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Umhverfis- og byggingarverkfræðideild (HÍ)
Faculty of Civil and Environmental Engineering (UI)
Birtist í: Journal of Environmental Engineering;143(8)
ISSN: 0733-9372
1943-7870 (eISSN)
DOI: https://doi.org/10.1061/(ASCE)EE.1943-7870.0001221
Efnisorð: Particle size; Resuspension; Settling; Short-circuiting; Stormwater pond; Treatment efficiency; Wash loads; Wind mixing; Tjarnir; Umhverfisverkfræði; Vindar
URI: https://hdl.handle.net/20.500.11815/581

Skoða fulla færslu

Tilvitnun:

Andradóttir, H. Ó. (2017). Impact of Wind on Stormwater Pond Particulate Removal. Journal of Environmental Engineering, 143(8), 04017027. doi:doi:10.1061/(ASCE)EE.1943-7870.0001221

Útdráttur:

Stormwater ponds provide cost and space-efficient treatment of urban runoff via gravitational settling. The goal of this paper was to quantify different mechanisms by which wind can affect the particle removal efficiency of a shallow retention pond. An analytical bulk model was developed and validated numerically against total suspended solids (TSS) measurements in a small (0.3 ha), optimally designed oval pond during four runoff events with 7–11  m/s winds. Simulations highlighted wind as an effective mixing mechanism, lowering the removal of medium silt particles by 10–20% from ideal plug flow, and severely constraining the removal of small clay and silt particles (<6  μm). Initial background concentrations of <12  mg/L TSS were positively correlated with wind speed 5 h prior to the event, indicative of localized wind resuspension. A widespread remobilization of bed sediments was found unlikely in a 1.7-m deep, 112-m fetch pond. A stirred reactor with 60% effective volume is proposed as a first order tool to assess the treatment performance of ideally structured ponds in areas with strong, unobstructed winds.

Leyfi:

This work is made available under the terms of the Creative Commons Attribution 4.0 International license, http://creativecommons.org/licenses/by/4.0/

Skrár

Þetta verk birtist í eftirfarandi safni/söfnum:


Fletta

Um vefinn

Reikningurinn minn