Trace Metal Pollutant Load in Urban Runoff from a Southern California Watershed

McPherson, Timothy N.; Burian, Steven J.; Stenstrom, Michael K.; Turin, H.; Brown, Michael J.; Suffet, I. H.

doi:10.1061/(asce)0733-9372(2005)131:7(1073)

Cited by 30 publications

(20 citation statements)

References 8 publications

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“…a cleansing event (Characklis and Wiesner 1997). Multiple medium-/high-flow events sampled in the Sydney estuary catchment indicate considerable variability in EMCs of metals for different storm events probably due to differences in length of antecedent period and variations in rainfall intensity (Williamson 1985;Yuan et al 2001;McPherson et al 2005). Nickel was an exception, with EMCs similar for all storm events and stormwater channels sampled, possibly due to preferential partitioning to the dissolved phase.…”

Section: Variability In Metals Loading With Flowmentioning

confidence: 92%

“…low and medium/high rainfall). Dry-weather flow originates from groundwater, permitted and illegal discharges, excess irrigation, automobile washing and other residential and commercial activities (McPherson et al 2005; ARMCANZ/ANZECC 2000). Annual precipitation for individual subcatchments was from Cruickshank (2006) and urban runoff was based on Chiew and McMahon (1999).…”

Section: Metal Export Modellingmentioning

confidence: 99%

“…Moreover, the New South Wales (NSW) Environmental Protection Authority has identified stormwater as responsible for 'almost all chemical pollution in Sydney Harbour' (NSW EPA 2001). Major sources of metals in urbanised catchments include road surfaces, atmospheric deposition, roof runoff, industrial activities, soil erosion, contaminated sites, sewer overflows and illegal discharges (Water Board 1993b;McPherson et al 2005).…”

Section: Sources Of Metals To Urban Stormwatermentioning

confidence: 99%

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Stormwater metal loading to a well-mixed/stratified estuary (Sydney Estuary, Australia) and management implications

Birch

Rochford

2009

Environ Monit Assess

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Stormwater modelling indicated an average annual discharge from Sydney estuary catchment of 215,300 mL and loadings of 0.8, 0.5, 1.7, 3.2, 1.1, 3.6 and 17.7 tonnes for As, Cd, Cr, Cu, Ni, Pb and Zn, respectively. Priority for remediation should be given to creeks with high-metal loads in the upper and central estuary, as well as discharging to the western shores of Middle Harbour. Managerial strategies need to target dissolved and particulate metal phases to ensure effective remediation. The proportion of metals discharged under low- (<5 mm rainfall/day), medium- (>5 to <50 mm/day) and high-flow conditions (>50 mm/day) was approximately 10%, 60% and 30% of total loading, respectively. Under high-flow conditions the estuary becomes stratified and most metals are exported to the sea, whereas metals discharged during low-flow may be remediated by infiltration. Effective remediation will depend on the extent to which 'first-flush' metals associated with medium-flow conditions can be remediated.

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Section: Variability In Metals Loading With Flowmentioning

confidence: 92%

Section: Metal Export Modellingmentioning

confidence: 99%

Section: Sources Of Metals To Urban Stormwatermentioning

confidence: 99%

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Stormwater metal loading to a well-mixed/stratified estuary (Sydney Estuary, Australia) and management implications

Birch

Rochford

2009

Environ Monit Assess

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“…Factors affecting sediment transport are now better known, however, processes governing metal concentrations in rivers and streams remain L. Palleiro et al: Hydroclimatic control of sediment and metal export relatively poorly understood, despite the importance of metals for aquatic ecosystems. Rainfall-runoff events were monitored in metallogenic (Cánovas et al, 2008), urban (McPherson et al, 2005) and agricultural areas , as well as in forest landscapes with serious problems of soil acidification (Borg and Johansson, 1989). However, rural catchment studies focusing on factors affecting metal loads during rainfall-runoff events are limited and most studies have not taken into account both hydrological and meteorological parameters, even though these are important for metal exportation.…”

Section: Introductionmentioning

confidence: 99%

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

Palleiro

Rodríguez‐Blanco

Taboada-Castro

2014

Hydrol. Earth Syst. Sci.

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Abstract. This paper examines sediment and metal (Al, Fe, Mn, Cu, and Zn) exportation at different timescales (annual, seasonal and event) during a 3-year period (2005)(2006)(2007)(2008) in the Mero River headwater, a rural catchment under humid temperate climate. Interannual differences were found both in annual loads and their distributions throughout the year. At annual scale, sediment and particulate metal loads followed the same trend as streamflow, while dissolved metals showed different patterns. Runoff events contributed to 63 % of the total sediment load, whereas particulate and dissolved loads in events accounted for between 38-61 and 27-49 %, respectively. Runoff events were characterized by high variability in sediment and metal loads, a few events representing a high percentage of the metal exported. Sediment loads were related to maximum and initial discharge. Particulate metal loads were highly correlated with sediment loads, runoff being the hydrological variable that best explains the load of these metals. Dissolved metal loads displayed different patterns. Dissolved Al, showed a great correlation with runoff, while dissolved Mn with maximum discharge.

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“…This perception is based on a climate characterized by low natural baseflow during the extended dry season followed by intense winter storms. However, dryweather flow may also constitute a significant threat to water quality in terms of both pollutant concentration and load (McPherson et al 2005;Stein and Tiefenthaler 2005). Dry weather flow can be particularly important in areas such as southern California, where the Mediterranean climate results in less than 40 days of rain per year (Nezlin and Stein 2005).…”

Section: Introductionmentioning

confidence: 98%

Dry Weather Flow Contribution of Metals, Nutrients, and Solids from Natural Catchments

Stein

Yoon²

2007

Water Air Soil Pollut

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Dry weather flow can be a substantial source of pollutants, particularly in urbanized areas such as southern California. To effectively evaluate and manage watershed-based pollutants, it is essential to understand the contribution of constituents from both developed and natural areas. Such information can be used by managers to set appropriate regulatory targets and to better evaluate severity of anthropogenic effects. This study quantified levels of suspended solids (TSS), metals, and nutrients from nineteen representative natural (undeveloped) streams in ten watersheds in southern California. Dry-weather concentrations and fluxes were typically one to two orders of magnitude lower than those from developed catchments. Constituent concentrations varied based on the catchment characteristics, with geologic type being the dominant factor that influenced variability among constituent levels. Concentration and flux values were independent of latitude, elevation, and catchment size suggesting that results from this study can be extrapolated to provide regional estimates of background water quality.

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Trace Metal Pollutant Load in Urban Runoff from a Southern California Watershed

Cited by 30 publications

References 8 publications

Stormwater metal loading to a well-mixed/stratified estuary (Sydney Estuary, Australia) and management implications

Stormwater metal loading to a well-mixed/stratified estuary (Sydney Estuary, Australia) and management implications

Hydroclimatic control of sediment and metal export from a rural catchment in northwestern Spain

Dry Weather Flow Contribution of Metals, Nutrients, and Solids from Natural Catchments

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