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

Popick, H.; Brinkmann, M.; McPhedran, Kerry

doi:10.1186/s12302-022-00619-x

Environmental Sciences Europe

Table 4 Comparison of measured versus theoretical loadings per catchment for the sampled 2019 ice-free SW season (June–August)

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

	Land use area (km²)	Seasonal SW volume (10³ m³)	Measured seasonal loading (kg)							Theoretical seasonal loading (kg)
	Land use area (km²)	Seasonal SW volume (10³ m³)	TSS	COD	Cu	Ni	Pb	Zn	PAHs	TSS	COD	Cu	Ni	Pb	Zn	PAHs
Wanuskewin Rd	25.5	1216	264,330 ± 211,021	565,293 ± 450,796	48.9 ± 50.5	8.15 ± 14.1	1.55 ± 1.61	546 ± 120	0.77 ± 0.52	345,189 ± 250,796	156,735 ± 67,511	121 ± 81.6	39.2 ± 12.4	224 ± 204	428 ± 294	1.09 ± 0.31
SCB E	24.6	1567	350,679 ± 197,142	443,541 ± 498,276	68.5 ± 76.1	13.6 ± 23.5	2.66 ± 1.76	375 ± 200	3.10 ± 3.73	362,769 ± 258,577	167,340 ± 71,554	109 ± 68.0	41.3 ± 14.9	214 ± 193	453 ± 313	1.33 ± 0.34
SCB W	9.58	757	38,158 ± 22,205	124,225 ± 97,227	54.0 ± 55.7	1.39 ± 1.43	3.55 ± 2.31	143 ± 80.6	0.59 ± 0.38	194,226 ± 138,684	89,451 ± 36,241	61.8 ± 35.6	21.3 ± 8.76	119 ± 106	239 ± 173	0.69 ± 0.04
17th St. W.	8.99	697	330,369 ± 286,392	655,420 ± 611,534	26.7 ± 17.1	5.13 ± 5.57	1.49 ± 0.73	118 ± 25.3	0.43 ± 0.46	125,815 ± 89,836	60,563 ± 24,537	38.5 ± 22.2	15.3 ± 6.3	74.5 ± 66.2	165 ± 119	0.47 ± 0.03
14th St. E.	3.18	223	53,097 ± 43,049	109,903 ± 121,122	7.58 ± 7.84	1.05 ± 1.24	0.42 ± 0.16	42.4 ± 12.1	0.17 ± 0.15	45,586 ± 32,256	22,174 ± 9,280	13.0 ± 7.84	5.64 ± 2.08	25.6 ± 23.1	58 ± 40.2	0.17 ± 0.02
MacPherson Ave	1.47	103	23,642 ± 22,043	60,653 ± 69,697	4.25 ± 4.84	0.52 ± 0.72	0.14 ± 0.05	22.0 ± 9.29	0.05 ± 0.7	21,073 ± 15,614	10,250 ± 4,724	6.0 ± 4.24	2.61 ± 0.75	11.9 ± 11.0	27 ± 17.7	0.08 ± 0.00
23rd St. W.	2.73	259	135,986 ± 110,662	160,338 ± 204,452	13.9 ± 15.4	3.54 ± 6.13	0.53 ± 0.24	54.9 ± 38.6	0.47 ± 0.17	63,584 ± 47,564	29,467 ± 11,253	21.7 ± 16.1	7.26 ± 1.23	40.5 ± 37.3	79 ± 56.9	0.22 ± 0.14

Measured seasonal loading was calculated by averaging measured concentrations of the indicated parameters to obtain a seasonal mean concentration per catchment. Seasonal SW volumes were calculated from local rain gauge data (see “Methods” and “Land use management” sections). Mass loading values were obtained using estimated seasonal runoff and compared to the sums of theoretical catchment loads. Parameters were selected for direct comparison with theoretical values

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