Urban stormwater runoff pollutant loadings: GIS land use classification vs. sample-based predictions

Masum, Abdullah Al; Bettman, Nathan; Read, Scott A.; Hecker, Markus; Brinkmann, Markus; McPhedran, Kerry N.

doi:10.1007/s11356-022-18876-x

Cited by 8 publications

(5 citation statements)

References 43 publications

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“…and SCB W, differ greatly in land use (Table 2 ), they are similar in area; other study catchments contribute loading generally proportional to their surface area as a percent of the CoS. This agrees with previous observations that catchment area is the dominant driver of contaminant loading [ 3 ].…”

Section: Resultssupporting

confidence: 88%

“…For example, roads and highways in the Light & Power catchment are each one-third the surface area of single-residential areas, yet each contribute almost 300% more COD and TSS loading (industrial land use generates twice as much per km 2 ). Al Masum et al [ 3 ] previously observed the impact of land use on CoS contaminant loading in 2017, also noting that industrial areas had the highest relative loadings.…”

Section: Resultsmentioning

confidence: 99%

“…The CoS receives an average of 355 mm of precipitation per year, with ~ 50 mm of precipitation falling between the months of November and March as snowfall. The CoS collects rainfall data from eight rain gauges [ 3 ] with relevant rain gauges used currently to estimate the individual catchment stormwater volumes and pollutant concentrations. As in many municipalities, the CoS rainfall is often localized making the use of relevant gauges important in the determination of reasonably accurate rainfall volumes.…”

Section: Methodsmentioning

confidence: 99%

“…Breakdowns of individual land-use areas within each of the seven CoS catchments have been previously determined [ 3 ] and are included currently in Additional file 1 : Figure S2. Briefly, to determine SW outfall loadings ( L ) into the SSR values needed to be determined including the individual catchment runoff coefficients (CR), the precipitation ( P ), and the site mean concentration (SMC).…”

Section: Methodsmentioning

confidence: 99%

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Assessment of stormwater discharge contamination and toxicity for a cold-climate urban landscape

2022

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Background Stormwater is water resulting from precipitation events and snowmelt running off the urban landscape, collecting in storm sewers, and typically being released into receiving water bodies through outfalls with minimal to no treatment. Despite a growing body of evidence observing its deleterious pollution impacts, stormwater management and treatment in cold climates remains limited, partly due to a lack of quality and loading data and modeling parameters. This study examines the quality of stormwater discharging during the summer season in a cold-climate, semi-arid Canadian city (Saskatoon, Saskatchewan). Results Seven stormwater outfalls with mixed-land-use urban catchments > 100 km2 were sampled for four summer (June–August 2019) storm events and analyzed for a suite of quality parameters, including total suspended solids (TSS), chemical oxygen demand (COD), dissolved organic carbon (DOC), metals, and targeted polyaromatic hydrocarbons (PAHs). In addition, assessment of stormwater toxicity was done using the two toxicity assays Raphidocelis subcapitata (algae) and Vibrio fischeri (bacteria). Notable single-event, single-outfall contaminant pulses included of arsenic (420 µg/L), cadmium (16.4 µg/L), zinc (924 µg/L), fluorene (4.95 µg/L), benzo[a]pyrene (0.949 µg/L), pyrene (0.934 µg/L), phenanthrene (1.39 µg/L), and anthracene (1.40 µg/L). The IC50 in both R. subcapitata and V. fischeri was observed, if at all, above expected toxicity thresholds for individual contaminant species. Principal component analysis (PCA) showed no clear trends for individual sampling sites or sampling dates. In contrast, parameters were correlated with each other in groups including DOC, COD, TSS, and reduced algal toxicity; and total dissolved solids (TDS), sum of metals, and pH. Conclusions In general, stormwater characteristics were similar to those of previous studies, with a bulk of contamination carried by the first volume of runoff, influenced by a combination of rainfall depth, antecedent dry period, land use, and activity within the catchment. Roads, highways, and industrial areas contribute the bulk of estimated contaminant loadings. More intensive sampling strategies are necessary to contextualize stormwater data in the context of contaminant and runoff volume peaks.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Assessment of stormwater discharge contamination and toxicity for a cold-climate urban landscape

2022

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“…The highest arsenic EMC was found in open space land uses. Al Masum et al (2022) found that green areas contained the lowest concentrations of pollutants in runoff compared with other urban lands. Likewise, in this study, heavy metal EMCs were significantly lower in open spaces and green areas as compared to other areas.…”

Section: Resultsmentioning

confidence: 99%

The effect of land-use type and climatic conditions on heavy metal pollutants in urban runoff in a semi-arid region

Soltaninia

Taghavi

Hosseini

et al. 2022

Journal of Water Reuse and Desalination

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This study examined the effects of land-use changes on heavy metal pollution in runoff in a catchment of Tehran, Iran. Urban runoff samples were collected from six stations, including five various land uses and mixed land uses. The event mean concentration (EMC) was applied to determine heavy metals, including mercury (Hg), arsenic (As), cadmium (Cd), zinc (Zn), lead (Pb), and copper (Cu), in five land uses. Sampling was done during six events with different antecedent dry days (ADDs) during 2019–2020. The result revealed higher heavy metal concentrations in runoff in the industrial land use compared to other land-use types in the catchment. The calculated EMC rates were as follows: EMC Zn > EMC Pb > EMC Cu > EM As > EMC Hg > EMC Cd. This study also found that the maximum and minimum EMCs of heavy metals were associated with rainfall events with 115 and 1 dry days, respectively. In comparison to other heavy metals, mercury and arsenic were at a higher level in runoff as determined by EMC data analysis. In order to minimize the risk of heavy metal contamination of runoff, the relocation of industrial land uses from urban environments to non-urban areas is recommended.

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Traffic-derived contaminant loading in snow storage facilities during spring melt

Popick

Brinkmann

McPhedran

2022

Environ Sci Pollut Res

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Urban stormwater runoff pollutant loadings: GIS land use classification vs. sample-based predictions

Cited by 8 publications

References 43 publications

Assessment of stormwater discharge contamination and toxicity for a cold-climate urban landscape

Assessment of stormwater discharge contamination and toxicity for a cold-climate urban landscape

The effect of land-use type and climatic conditions on heavy metal pollutants in urban runoff in a semi-arid region

Traffic-derived contaminant loading in snow storage facilities during spring melt

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