WATER QUALITY VOLUME" IN THE NORTHWEST OF SPAIN FOR SIZING OF HIGHWAY RUNOFF TREATMENT SYSTEMS | VOLUMEN DE LA CALIDAD DEL AGUA" EN EL NOROESTE DE ESPAÑA PARA EL DIMENSIONAMIENTO DE LOS SISTEMAS DE TRATAMIENTO DE ESCURRIMIENTOS DE CARRETERAS | VOLUME DE QUALIDADE DE ÁGUA" NO NOROESTE DE ESPANHA PARA DIMENSIONAMENTO DE SISTEMAS DE TRATAMENTO DE ESGOTO DE RODOVIA

English. A pilot Austin sand filter has been designed to reduce metals, hydrocarbons and suspended solids from stormwater runoff in a highway reach in Fene (Spain). The unit filtrates a percentage of the annual runoff volume reducing the mobilized loads of pollutants through filtration and sorption. Before the final design of the filter, a field campaign was developed to characterize runoff pollution of the pilot catchment. Runoff was heavily polluted with sediments, COD, total phosphorous, copper and zinc. Field data was also used to develop a calibrated hydraulic model of the catchment with the Storm Water Management Model (SWMM). This model was used to size the treatment unit with a hydrologic-hydraulic criterion: % of treated annual runoff and number of discharges per year. The specific volume of the treatment unit is the so call "Water Quality Volume"-WQv- that is traditionally used to design sustainable urban drainage techniques. This paper present the analysis of the Austin filter yields using the hydrographs and polutographs measured in the control section. Following the previous hydrological methodology the sedimentation-filtration unit was sized with a WQv of 15 mm. The results of the study from field data show that 98% of the total volume of runoff and 96% of the total mass of suspended solids mobilized at the events characterized would be pass by the treatment.

Spanish; Castilian. Se ha diseñado un filtro de arena Austin piloto para reducir metales, hidrocarburos y sólidos en suspensión de la escorrentía de aguas pluviales en un tramo de carretera en Fene (España). La unidad filtra un porcentaje del volumen de escorrentía anual reduciendo las cargas movilizadas de contaminantes mediante filtración y sorción. Antes del diseño final del filtro, se desarrolló una campaña de campo para caracterizar la contaminación por escorrentía de la cuenca piloto. La escorrentía estaba muy contaminada con sedimentos, DQO, fósforo total, cobre y zinc. Los datos de campo también se utilizaron para desarrollar un modelo hidráulico calibrado de la cuenca con el Modelo de gestión de aguas pluviales (SWMM). Este modelo se utilizó para dimensionar la unidad de tratamiento con un criterio hidrológico-hidráulico: % de escurrimiento anual tratado y número de vertidos por año. El volumen específico de la unidad de tratamiento es el denominado "Volumen de Calidad del Agua" -WQv- que tradicionalmente se utiliza para diseñar técnicas de drenaje urbano sostenible. Este artículo presenta el análisis de los rendimientos del filtro Austin utilizando los hidrogramas y polutógrafos medidos en la sección de control. Siguiendo la metodología hidrológica anterior se dimensionó la unidad de sedimentación-filtración con un WQv de 15 mm. Los resultados del estudio a partir de datos de campo muestran que el 98% del volumen total de escorrentía y el 96% de la masa total de sólidos en suspensión movilizados en los eventos caracterizados pasarían por el tratamiento.

Portuguese. A pilot Austin sand filter has been designed to reduce metals, hydrocarbons and suspended solids from stormwater runoff in a highway reach in Fene (Spain). The unit filtrates a percentage of the annual runoff volume reducing the mobilized loads of pollutants through filtration and sorption. Before the final design of the filter, a field campaign was developed to characterize runoff pollution of the pilot catchment. Runoff was heavily polluted with sediments, COD, total phosphorous, copper and zinc. Field data was also used to develop a calibrated hydraulic model of the catchment with the Storm Water Management Model (SWMM). This model was used to size the treatment unit with a hydrologic-hydraulic criterion: % of treated annual runoff and number of discharges per year. The specific volume of the treatment unit is the so call "Water Quality Volume"-WQv- that is traditionally used to design sustainable urban drainage techniques. This paper present the analysis of the Austin filter yields using the hydrographs and polutographs measured in the control section. Following the previous hydrological methodology the sedimentation-filtration unit was sized with a WQv of 15 mm. The results of the study from field data show that 98% of the total volume of runoff and 96% of the total mass of suspended solids mobilized at the events characterized would be pass by the treatment.