[en] Within the following Thesis, an exhaustive research about the pollution flows shaken by the rainwater runoff in highways and high capacity road networks during rainfall events has been made. It is shown both the relevance and possibility of causing significant environmental impacts on the water bodies, nutrient runoff in storm water, and the difficulty of developing trustworthy models of prediction. In order to do this, the existence of a list of pollutants, in particular COO, soluble COO, BOOs, turbidity, conductivity, totalN, totalP, ST, STV, SST, SSV, SOT, SOV, metals: Al, As, B, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, V, Zn, oils and greases and hydrocarbons PAHs and HC) has been analysed throughout a big period of time. Those analyses have had into account the rainwater runoff coming from storm water in two highways in the northwest of Spain, at the same time that rainfall and the volume of water resultant were registered. Rainfall events have been configured in order to facilitate its subsequent study (CMAX, EMC, CMOV and SMC) and to improve taking decisions about the necessity of installation and systematization of the sustainable rainwater runoff drainage network sizing in the highways (TOSEA). Correlations between the different pollutants and their hydrological and hydraulic basins parameters have been studied; as well as the different countries' regulations in a close-up study, the main academic studies already done, and a comparison of the observed results with other urban basins of interest previously studied in the Water and Environment Engineering Group (GEAMA). A numerical model of hidraulic simulation and pollution on the computing environment 'Storm Water Management Model' (SWMM) has been created in order to be able to validate the sizing of the TOSEA. Finally, on one of the basins studied, a functional TOSEA that works on a wide part of it has been sized and built, being able to make progress in the topie. It is important to plan and define pollution control strategies associated to rainwater runoff in highways, and that they can be transferred to the legal system in the autonomous region so as to achieve the qua lit y aims set in the hydrological plan in the water recipients, just as the Water Framework Oirective requires, simplifying taking decisions for their establishment, making the necessary land reserves and sizing.

[gl] Na presente Tese realizouse un exhaustivo estudo dos fluxos de contaminación mobilizados coa s escorrentías de autoestradas e vías de alta capacidade durante os sucesos de choiva. Ponse de manifesto tanto a relevancia e capacidade de ocasionar impactos significativos sobre o medio acuático receptor das escorrentías, como a dificultade de elaborar modelos fiables de predición. Para isto analizouse, ao longo dun extenso período de tempo, a presenza dunha listaxe de contaminantes (OQO, OQO soluble, OBOs, pH, turbidez, conductividade, NT, PT, ST, STV, SST, SSV, SOT, SOV, metais: Al, As, B, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, V, Zn, aceites e graxas e hidrocarburos: HAP e HC) en mostras de escorrentías procedentes de eventos de choiva de dous viarios no noroeste de España, á vez que se facía un rexistro das precipitacións e os caudais asociados aos devanditos eventos. Parametrizáronse os sucesos de choiva co fin de facilitar o seu estudo posterior (CMAX, CMS, CMOV e CME) e avanzar na toma de decisións sobre a necesidade de instalación e na sistematización do dimensiona mento das técnicas de drenaxe sustentable de escorrentías de autoestradas (TOSEA). Estudáronse as correlacións entre os distintos contaminantes entre si e cos parámetros hidrolóxico-hidráulicos das concas, ademais de revisar a normativa de diferentes países, os principais estudos académicos e comparar os resultados observados cos doutras concas urbanas de interese, anteriormente estudadas no Grupo de Enxeñería da Auga e do Medio Ambiente (GEAMA). Elaborouse un modelo numérico de simulación hidráulico e de contaminación sobre o soporte informático "Storm Water Management Model" (SWMM) co que poder validar o dimensionamiento das TOS EA. Finalmente dimensionouse e construiuse, nunha das concas estudadas, unha TOSEA funcional que trata as escorrentías dunha parte ampla da conca e sobre a que poder seguir avanzando no estudo da materia. É importante planificar e definir estratexias de xestión da contaminación asociada ás escorrentías de autoestradas e que estas se trasladen ao ordena mento xurídico da comunidade autónoma co fin de poder cumprir os obxectivos de calidade fixados polos plans hidrólogicos nas masas de auga receptoras, tal como esixe a Oirectiva Marco da Auga, simplificando a toma de decisións para a súa implantación, facer as reservas do solo necesario e para o seu dimensionamiento.