Urban runoff pollution : modelling and uncertainty in return period analysis

Since the construction of wastewater treatment plants combined sewer overflows have become an increasingly important limitation to the quality of the surrounding surface waters. Over the years urban water resources have often been so modified by anthropogenic activity that water quality management requires an integrated approach both at an evaluation and an investment level. Effects of acute pollutants, such as oxygen depletion caused by excessive organic material, should be evaluated on the basis of their return periods. Models of the relevant water systems are then used both to calculate the... Mehr ...