A hydrological model to estimate pollution from combined sewer overflows at the regional scale: Application to Europe

不透水面 合流下水道 环境科学 过程线 水文学(农业) 人口 比例(比率) 流域 地表径流 雨水 地理 工程类 地图学 岩土工程 生态学 人口学 社会学 生物
作者
Emanuele Quaranta,Stephan Fuchs,H.J. Liefting,Alma Schellart,Alberto Pistocchi
出处
期刊:Journal of Hydrology: Regional Studies [Elsevier BV]
卷期号:41: 101080-101080 被引量:1
标识
DOI:10.1016/j.ejrh.2022.101080
摘要

Combined Sewer Overflows (CSO) of 671 Functional Urban Areas (FUAs) throughout the European Union + UK (EU28), representing almost half of the EU28 population. CSO loads can be quantified at the local scale through measurements, or with calibrated hydrological models. However, they are difficult to quantify at a large scale (e.g. regional or national), due to a lack of data, and the models used at local scale cannot be applied in the absence of knowledge of the combined sewer (CS) network. This paper presents a 6-parameter lumped hydrological model to simulate a CS network and its overflows, using population and rainfall data of 671 EU28 FUAs. When properly calibrated, the model can predict the CSO hydrographs as well as aggregated CSO descriptors of a catchment with known impervious surface area connected to a CS with a reasonable reliability. When model calibration is not possible, using default values of the parameters enables a first approximation estimate of CSOs, accurate within one order of magnitude, which can be used to support scenario analysis for regional and continental CSO management. At the EU28 scale, the estimated total CSO volume is 5.7·10 3 Mm 3 /y, with a dry weather flow content in CSOs of 460 Mm 3 /y (assuming a dry weather flow of 200 l/population equivalent (PE)/day including sanitary discharges, industrial discharge and infiltration). A collection of case studies on CSOs is also provided. • A hydrological model was developed to estimate CSO loads. • When properly calibrated, the model can reasonably predict the CSO hydrographs. • The model can be used to support EU scenario analysis. • At the EU scale, the estimated total CSO volume is 5.7·10 3 Mm 3 /y.
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