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Open AccessArticle

EmiStatR: A Simplified and Scalable Urban Water Quality Model for Simulation of Combined Sewer Overflows

Department for Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST), L-4362 Esch-sur-Alzette, Luxembourg
Soil Geography and Landscape Group, Wageningen University, 6700AA Wageningen, The Netherlands
Department of Urban Drainage Monitoring, NIVUS GmbH, 75031 Eppingen, Germany
Author to whom correspondence should be addressed.
Water 2018, 10(6), 782;
Received: 20 January 2018 / Revised: 30 May 2018 / Accepted: 4 June 2018 / Published: 13 June 2018
(This article belongs to the Special Issue Quantifying Uncertainty in Integrated Catchment Studies)
PDF [3594 KB, uploaded 13 June 2018]


Many complex urban drainage quality models are computationally expensive. Complexity and computing times may become prohibitive when these models are used in a Monte Carlo (MC) uncertainty analysis of long time series, in particular for practitioners. Computationally scalable and fast “surrogate” models may reduce the overall computation time for practical applications in which often large data sets would be needed otherwise. We developed a simplified semi-distributed urban water quality model, EmiStatR, which brings uncertainty and sensitivity analyses of urban drainage water quality models within reach of practitioners. Its lower demand in input data and its scalability allow for simulating water volume and pollution loads in combined sewer overflows in several catchments fast and efficiently. The scalable code implemented in EmiStatR reduced the computation time significantly (by a factor of around 24 when using 32 cores). EmiStatR can be applied efficiently to test hypotheses by using MC uncertainty studies or long-term simulations. View Full-Text
Keywords: urban water modelling; fast surrogate model; parallel computing urban water modelling; fast surrogate model; parallel computing

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Torres-Matallana, J.A.; Leopold, U.; Klepiszewski, K.; Heuvelink, G.B.M. EmiStatR: A Simplified and Scalable Urban Water Quality Model for Simulation of Combined Sewer Overflows. Water 2018, 10, 782.

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