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Water 2017, 9(5), 303; doi:10.3390/w9050303

Urban Runoff Characteristics in Combined Sewer Overflows (CSOs): Analysis of Storm Events in Southeastern Spain

1
Hidr@m Group, Department of Civil Engineering, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 52, 30203 Cartagena, Spain
2
Empresa Municipal de Aguas y Saneamiento de Murcia, S.A., Plaza Circular 9, 30008 Murcia, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Arjen Y. Hoekstra
Received: 23 February 2017 / Revised: 17 April 2017 / Accepted: 23 April 2017 / Published: 26 April 2017
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Abstract

Storm water overflows have an important impact on the environment in many European countries. Nowadays, a better knowledge of combined sewer overflows (CSOs) pollution is required for implementing measures to reduce these emissions. In this work, pollution flows mobilized during rainy events have been monitored and modeled in two urban catchments located in the city of Murcia (southeast Spain). For each analyzed event, rainfall volume, in-sewer turbidity and water flow depth have been continuously measured. Therefore, sets of pollutographs and hydrographs have been obtained for each event analyzed. Characteristic variables have been defined and obtained for each event such as the maximum concentration of turbidity, the total event rainfall, the previous dry weather period, the time to the peak of the hydrograph and to the peak of the pollutograph, among others. Relations between variables have been adjusted through a statistical model. The adjusted parameters are used to generate pollutographs that are compared with those measured in field. The present work provides tools to assist in the knowledge of pollution transported through sewer network during stormy events, suggesting the creation of design pollutographs which may facilitate the evaluation of measures to reduce urban runoff pollution. View Full-Text
Keywords: combined sewer overflow (CSO); sewer system; turbidity; pollution prediction indexes; pollutographs combined sewer overflow (CSO); sewer system; turbidity; pollution prediction indexes; pollutographs
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

García, J.T.; Espín-Leal, P.; Vigueras-Rodriguez, A.; Castillo, L.G.; Carrillo, J.M.; Martínez-Solano, P.D.; Nevado-Santos, S. Urban Runoff Characteristics in Combined Sewer Overflows (CSOs): Analysis of Storm Events in Southeastern Spain. Water 2017, 9, 303.

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