Evaluation of statistical distributions to analyze the pollution of Cd and Pb in urban runoff

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Amin Toranjian, Safar Marofi

Abstract

Heavy metal pollution in urban runoff causes severe environmental damage. Identification of these pollutants and their statistical analysis is necessary to provide management guidelines. In this study, 45 continuous probability distribution functions were selected to fit the Cd and Pb data in the runoff events of an urban area during October 2014-May 2015. The sampling was conducted from the outlet of the city basin during seven precipitation events. For evaluation and ranking of the functions, we used the goodness of fit Kolmogorov-Smirnov and Anderson-Darling tests. The results of Cd analysis showed that Hyperbolic Secant, Wakeby and Log-Pearson 3 are suitable for frequency analysis of the event mean concentration (EMC), the instantaneous concentration series (ICS) and instantaneous concentration of each event (ICEE), respectively. In addition, the LP3, Wakeby and Generalized Extreme Value functions were chosen for the EMC, ICS and ICEE related to Pb contamination.

References

Oct 27, 1999·The Science of the Total Environment·M Legret, C Pagotto
Jan 5, 2011·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·C VieiraM B P P Oliveira
May 22, 2013·Environmental Science and Pollution Research International·Dong ZhouJing-Chao Han

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