Hypoxic conditions in stormwater retention ponds: potential for hydrogen sulfide emission

Environmental Technology
Liyu ChenColin D Rennie

Abstract

Improper design and maintenance of stormwater ponds (SWPs) may lead to hypoxic conditions, poor water quality and the production of hydrogen sulfide (H2S). The objective of this study is to develop a comprehensive understanding of hypoxic conditions of SWPs, with a focus on the potential for H2S production and emission. This study was conducted at two retention SWPs in Ottawa, Canada; a problematic pond with the propensity for H2S emission and a reference pond that did not demonstrate H2S emission. The investigation illustrated a significant impact of low dissolved oxygen (DO) concentrations, hypoxic conditions, on the concentration of total sulfides in the water column. Both ponds were shown to periodically experience hypoxic conditions at depth, especially during summer periods with less precipitation and across longer periods of winter, ice-covered conditions. The problem pond, however, was shown to experience lower DO and longer hypoxic conditions than the reference pond in both non-ice-covered and ice-covered conditions due to greater depth and a longer hydraulic retention time. Hypoxic conditions were initiated at the deepest locations in the problem pond and subsequently were spread across the entirety of the pond under ...Continue Reading

References

Mar 13, 2014·Water Environment Research : a Research Publication of the Water Environment Federation·Valerie HoangAlain Gadbois
Oct 16, 2015·Environmental Management·Jason C LeppiMatthew S Whitman

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Citations

Jun 13, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·P M D'AoustR Delatolla
Jul 15, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Carolyn M RodakJason R Vogel

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