Sewer Systems and Climate Change

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Abstract

In this article the impact of climate change on the overflows of sewer systems is assessed. The emphasis is on the overflows of combined sewer systems. The purpose is twofold: first, to obtain a first-order estimate of the impact of climate change on overflows of sewer systems; and second, to obtain insight into the relevant meteorological variables that are important with respect to climate change. A reservoir model is used to assess the impact of climate change on several combinations of storage capacity and pumpovercapacity of the sewer system. A time series of precipitation depth for Lelystad, with time steps of five minutes, is used as a base case for comparison. Two types of scenarios are used to assess the sensitivity for elimate change: artificial climate scenarios and scenarios based on the analogous elimate method.

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