Characterization and prediction of highway runoff constituent event mean concentration

The temporal changes in road stormwater runoff quality and the implications to first flush control in Chongqing, China

“…The minimum, maximum, mean concentrations and standard deviations of the pollutants in nine raining events are shown in Table 2 Comparing the runoff quality between Chongqing, Macau, (Huang et al 2007), and Guangzhou in China (Gan et al 2008), Genoa, Italy (Gnecco et al 2005), and Los Angeles, California (Han et al 2006) and California in the USA (Kayhanian et al 2007) (Table 3), the mean EMCs of TSS, TP, TN, and COD concentrations in urban road runoff in Chongqing were significantly higher than in Macau and Genoa. Compared with the highway sites, the mean EMC of TSS concentrations in Chongqing was significantly higher than the other urban sites.…”

“…Kayhanian et al (2007) and Gan et al (2008) found that the event mean concentration (EMC) values of pollutants have a significant negative correlation with the rainfall volume. Some studies have found a positive correlation between the load or concentration of certain pollutants and rainfall intensity (Crabtree et al 2008), while others show negative relationships (Crabtree et al 2006;Kim et al 2005).…”

Heavy Metal Removal in a Detention Basin for Road Runoff

“…It is common to characterize the quality of road runoff through its average local concentration, which is the average or the median of the average concentrations of monitored events [3,11]. When the number of events monitored is relatively low, the calculation of the average local concentration is more indicated by the average of the average concentrations of events, or simply by analysing the latter parameter, as seen in Barbosa [3].…”

“…This procedure allows identifying the first flux, which usually occurs in the first minutes and contains the higher pollutant load [3,10]. Albuquerque et al [9] has found higher pollutant loads in high intensity rainfalls associated to previous low periods of dry weather conditions, which that somehow contradicts the results and conclusions of Kayhanian et al [11] and Polkowska et al [10].…”

“…The results of monitoring performed by Barbosa [3], Antunes and Barbosa [12], Crabtree et al [8], Kayhanian et al [11] and Polkowska et al [10] present different concentrations for organic materials, nitrogen, phosphorus and heavy metals (Cd, Cu, Cr, Fe, Ni, Pb and Zn). The determinations were made in the drainage basin, drainage ditches, junction boxes and at inlet of treatment systems.…”