Synthetic pollutograph by prediction indices: An evaluation in several urban sub-catchments

Journal ar
Sustainability (Switzerland)
  • Volumen: 10
  • Número: 8
  • Fecha: 26 julio 2018
  • ISSN: 20711050
  • Tipo de fuente: Revista
  • DOI: 10.3390/su10082634
  • Tipo de documento: Artículo
  • Editorial: MDPI AG Postfach Basel CH-4005
© 2018 by the authors. A generalized methodology applicable to any urban sub-catchment to calculate the pollution curve due to combined sewer overflows would help to implement integrated management policies to reduce urban impacts on the environment. An existing methodology to predict the pollutographs associated to rainfall events is tested in five different sub-catchments with very different pluviometry. Ninety-three rainfall events have been considered by measuring the in-sewer turbidity along the runoffepisodes. Such data is then evaluated to obtain two prediction indices: the time to peak of pollutograph ITPP, and the maximum turbidity concentration ICMAX. These indices may be used with linear regressions to calculate the characteristics of pollutographs, such as the time to the peak, TPP, the maximum concentration of turbidity, CMAXtb, and the time to descent, TDP. These parameters allow to estimate the pollutographs of a sub-catchment. The comparison between pollutographs measured in the Ensanche sub-catchment and those calculated with the methodology shows a good agreement in terms of the root mean square deviation between samples and estimated values with the model proposed. Hence, the methodology could be a key way to find synthetic pollutographs for any sub-catchment.

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