A Stormwater Treatment Strategy for Port Pavement Runoff

Le résumé fourni par la source

Developed areas with more impervious pavement surfaces usually experience increased levels of stormwater runoff and associated higher pollutant loadings. A common practice to more economically treat these associated pollutants is to design treatment options for the water quality volume of a storm, that is, the first part of a large storm that frequently includes the first flush, where pollutants deposited between events may be dislodged. This theoretical case study includes an add-on strategy for water quality improvement optimization by additionally focusing on the stormwater ‘hotspot’ contributing areas known for having higher pollutant loadings, frequently five to ten times higher. The methodology is developed and then theoretically applied to a series of options for a ferry terminal case, with two innovative designs; a reverse slope to land treatment train and a pervious concrete overlay with sweeping combination. The results are presented in tabular formats which might be usable as comparative multi-criteria decision support tools by decision makers. Further theoretical evaluations of one of the options provide for an additional pictorial decision support tool for environmental uncertainty considerations. The results indicate a significant increase in system or treatment train efficiency even for conservative hotspot factors.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.