Staff

Samuel Derwort

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Samuel Derwort

Department Urban Water Management

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Projects

The SensorLab platform for automated sensor integration, data processing and monitoring – so researchers can focus on science.

Maia – Measurement Acquisition and Integration for Analytics
Urban Living Lab for linking different projects in the field of water and climate adaptation with each other

BlueX: Blue Nexus Lab
The Urban Water Observatory (UWO) is a long-term (5-year) initiative of ETH and Eawag to establish a sensor network in Fehraltorf...

UWO - Urban Water Observatory

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Publications

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Modelling the adoption of combined sewer overflow surveillance in Switzerland

During wet weather, combined sewer overflows (CSOs) spill untreated wastewater to hydraulically protect wastewater treatment plants. Interestingly, in Switzerland, the impact of these discharges on surface water quality remains unclear due to limited monitoring of CSO spills. Although affordable sensors and regular data review could address this, it is unclear why most wastewater associations seldom assess this data, highlighting political and organisational challenges within wastewater associations and their stakeholder networks rather than technical ones. This study explores different policy instruments to promote sensor adoption in CSOs, e.g. for event duration monitoring, using an agent-based model (ABM). The stakeholders' behaviour is modelled through the Theory of Planned Behaviour and the Bounded Confidence Model. We developed a prototype ABM, testing three policy instruments as scenarios: (i) professional events, (ii) mandatory sensor installation, and (iii) improved sensor technology. Our findings suggest that it is most effective to make sensor installation mandatory. However, quantitative results of the ABM must be taken with care, due to sparse data in regard to uncertainties, as emphasized by sensitivity analysis. Despite this, the process of building the model was considered beneficial, as it enhanced the understanding of the socio-technical system.
Derwort, S. F.; Manny, L.; Carbajal, J. P.; Fischer, M.; Rieckermann, J. (2025) Modelling the adoption of combined sewer overflow surveillance in Switzerland, Water Science and Technology, 92(1), 79-95, doi:10.2166/wst.2025.081, Institutional Repository

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Address

E-Mail: samuel.derwort@eawag.ch
Phone: +41 58 765 5329
Fax: +41 58 765 5802
Address: Eawag
Überlandstrasse 133
8600 Dübendorf
Office: BU C15
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Research Group

SWW

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