The Updated Stormwater Quality Database (NSQD), Version 3

Pitt, Robert; Maestre, Alex; Hyche, H.; Togawa, Noboru

doi:10.2175/193864708788735015

Cited by 44 publications

(77 citation statements)

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“…Organic debris may be the main source for site SR4 since this site drains runoff from a park. TN values found in the sampled sites were around three to sevenfold higher than the concentrations reported by Taylor et al (2005) and the NSQD (Pitt et al 2004). …”

Section: Resultscontrasting

confidence: 58%

“…García-Flores et al (2009) found high concentrations of oil and grease in stormwater samples for the same residential sites (an average of 20 mg/L), for the industrial sites (14 mg/L) and for site SCT (19 mg/L). These values are five and threefold higher, respectively, than the median values reported for stormwater from residential and industrial land-use sites by the NSDQ (Pitt et al 2004).…”

Section: Resultsmentioning

confidence: 52%

“…The average TSS concentrations are considerably higher than in other published studies (Baldy et al 1998;He et al 2010). The average TSS concentration in SR1 and SR4 is 65 and 10 times higher, respectively, than the National Stormwater Data Quality (NSDQ) (Pitt et al 2004) for a mixed residential land-use site (68 mg/L). This high TSS concentration in site SR1 is probably due to the high slope and the unpaved streets located in the basin areas of the site that transport high quantities of sediment due to erosion.…”

Section: Resultsmentioning

confidence: 54%

“…This may be produced by the high content of TSS in the samples as well as the oil and grease generated by crankcase oil leakages and the street food vendors situated in the drainage area of the site. The average COD values for the other residential sites are between 324 and 421 mg/L, which are approximately 5-8 times higher than the average value reported by the NSQD (Pitt et al 2004). The high COD values may be the result of crankcase oil leakage from poorly maintained vehicles onto street and parking lot surfaces (MijangosMontiel et al 2010).…”

Section: Resultsmentioning

confidence: 92%

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Pollutant association with suspended solids in stormwater in Tijuana, Mexico

Wakida

Martinez-Huato

García-Flores

et al. 2013

Int. J. Environ. Sci. Technol.

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Stormwater runoff from urban areas is a major source of many pollutants to water bodies. Suspended solids are one of the main pollutants because of their association with other pollutants. The objective of this study was to evaluate the relationship between suspended solids and other pollutants in stormwater runoff in the city of Tijuana. Seven sites were sampled during seven rain events during the 2009-2010 season and the different particle size fractions were separated by sieving and filtration. The results have shown that the samples have high concentration of total suspended solids, the values of which ranged from 725 to 4,411.6 mg/L. The samples were analyzed for chemical oxygen demand, total phosphorus, total nitrogen, and turbidity. The results show that most of the particles in suspended solids are in the particle fraction between 10 and 62 lm. A high association between the concentrations of suspended solids was found for chemical oxygen demand, phosphorus, and turbidity but not for total nitrogen.

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Section: Resultscontrasting

confidence: 58%

Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 54%

Section: Resultsmentioning

confidence: 92%

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Pollutant association with suspended solids in stormwater in Tijuana, Mexico

Wakida

Martinez-Huato

García-Flores

et al. 2013

Int. J. Environ. Sci. Technol.

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“…According to The National Stormwater Quality Database (NSQD) (Pitt et al 2004), stormwater runoff contains on average 3 mg L -1 TN and \1 mg L -1 TP. Due to variations in bottom mud compaction and corresponding changes in water volume, it was difficult to maintain constant initial nutrient loading in our experiment; therefore, a small amount of deviation from the usual stormwater quality was observed in the initial nutrient concentrations.…”

Section: Resultsmentioning

confidence: 99%

Floating wetland mesocosm assessment of nutrient removal to reduce ecotoxicity in stormwater ponds

Chang

Islam

Wanielista

2012

Int. J. Environ. Sci. Technol.

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A grouped mesocosm study was conducted with different water holding capacities and conditions to determine nutrient removal efficiency using floating wetland macrophytes. Different scenarios were created by changing water depth, littoral vegetation, sorption media and area coverage to observe how they affect nutrient removal efficiencies. Plant species were screened and selected based on the literature, local availability and previously performed microcosm studies. Sorption media were warped using geotextile filter fostering microbial colonization in the rhizospheric zone to enhance denitrification and plant growth. Water quality parameters included total nitrogen, total phosphorus, orthophosphate, nitratenitrogen and ammonia-nitrogen in addition to in situ parameters such as pH, dissolved oxygen, temperature and chlorophyll-a. Composite samples across several locations were collected periodically to understand the spatial distribution or aggregation of nutrients. After 3 months of water quality monitoring, plants were analyzed for tissue nutrient concentrations, and the average uptake rate was calculated as 36.39 and 1.48 mg m -2 day -1 for nitrogen and phosphorus, respectively, by the floating treatment wetland system. Finally, considering the higher nutrient aggregation in the rhizospheric zone, the removal rate with 5 % area coverage and water quality improvement by littoral zone, the optimized design, placement and maintenance of the whole system were recommended.

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Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States

Gallo

Brooks

Lohse

et al. 2012

Hydrological Processes

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Urban expansion and the scarcity of water supplies in arid and semiarid regions have increased the importance of urban runoff to localized water resources. However, urban catchment responses to precipitation are poorly understood in semiarid regions where intense rainfall often results in large runoff events during the short summer monsoon season. To evaluate how urban runoff quantity and quality respond to rainfall magnitude and timing, we collected stream stage data and runoff samples throughout the 2007 and 2008 summer monsoons from four ephemeral drainages in Tucson, Arizona. Antecedent rainfall explained 20% to 30% of discharge (mm) and runoff ratio in the least impervious (22%) catchment but was not statistically related to hydrologic responses at more impervious sites. Regression models indicated that rainfall depth, imperviousness and their combined effect control discharge and runoff ratios (p < 0.01, r 2 = 0.91 and 0.75, respectively). In contrast, runoff quality did not vary with imperviousness or catchment size. Rainfall depth and duration, time since antecedent rainfall and event and cumulative discharge controlled runoff hydrochemistry and resulted in five specific solute response patterns: (i) strong event and seasonal solute mobilization (solute flush), (ii) event chemostasis and strong seasonal flush, (iii) event chemostasis and weak seasonal flush, (iv) event and seasonal chemostasis and (v) late seasonal flush. Our results indicate that hydrologic responses of semiarid catchments are controlled by rainfall partitioning at the event scale, whereas wetting magnitude, frequency and timing alter solute stores readily available for transport and control temporal runoff quality.Only rainfall variables that yielded significant solute regressions are shown. Correlations with a significance level less than 0.1 are in bold. a n = 35 for all solutes except for E. coli, where n = 9, and Hg, where n = 13. b n = 31 for all solutes except for E. coli, where n = 9, and Hg, where n = 13. c n = 26 for all solutes except for E. coli, where n = 6 and Hg, where n = 9. d Because E. coli was only measured for two to three storm events for each site, we have not calculated NCL. *Solute correlations and m NCL-NCQ with p < 0.05. **Solute correlations and m NCL-NCQ with 0.05 < p < 0.1. 1002 E. L. GALLO ET AL.

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The Updated Stormwater Quality Database (NSQD), Version 3

Cited by 44 publications

References 0 publications

Pollutant association with suspended solids in stormwater in Tijuana, Mexico

Pollutant association with suspended solids in stormwater in Tijuana, Mexico

Floating wetland mesocosm assessment of nutrient removal to reduce ecotoxicity in stormwater ponds

Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States

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