Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Session Overview
Plenary 12: In-Sewer Processes 3 - Sediments
Friday, 26/Aug/2022:
8:50am - 10:20am

Session Chair: Kapil Gupta
Location: Lecture Hall BMT

BMTEG138 (HS BMT), Biomedical Engineering Building at Stremayrgasse 16, 8010 Graz, ground floor

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8:50am - 9:10am

Improving sediment monitoring strategies based on SWMM-HEAT and temperature sensors

Manuel Regueiro-Picallo1,2, Alejandro Figueroa1, Jörg Rieckermann1

1Eawag, Swiss Federal Institute of Aquatic Science and Technology; 2Universidade da Coruña

  • A generally-applicable approach was developed to identify potential locations where sediment accumulation occur based on sewer network hydrodynamics.
  • Sewer network thermodynamics were used to simulate sewer temperature patterns from which sediment accumulation could be estimated.
  • The combination of previous analyses led to an effective strategy for determining the deployment of sediment accumulation monitoring devices.

9:10am - 9:30am

Validation of sediment transport models in a stormwater network using high-resolution turbidity data

Karen Lorena Rojas-Gomez1,2, Julian Reyes-Silva2, Jakob Benisch2, Björn Helm2, Manfred Schütze3, Peter Krebs2

1Helmholtz-Centre of Environmental Research – UFZ, Germany; 2Technische Universität Dresden, Institute of Urban Water Management; 3ifak e. V. Magdeburg, Department Water and Energy

Predicting sediment transport at urban catchment scale is a challenge. In this study we aimed to validated a new simplified approach to simulate sediment transport in a stormwater network. We used turbidity and discharge data measured at the outlet of a small urban catchment in Dresden, Germany. The high-resolution data was useful for calibration and validation of the couple model developed using the new approach. The representation of the mobilisation of sediments in the stormwater network was significantly improved. This simplified approach allows a more accurate prediction of the total transported mass of sediments during a rainfall event.

9:30am - 9:50am

First flush assumptions in pollution management for separate stormwater systems: debunking a classical urban (drainage) myth

Ditte Marie Reinholdt Jensen1,2,3, Santiago Sandoval4,5, Jean-Luc Bertrand-Krajewski4, Peter Steen Mikkelsen1, Luca Vezzaro1

1Technical University of Denmark, Denmark; 2Chinese Academy of Sciences, China; 3Sino-Danish Center for Education and Research, Denmark & China; 4Institut National des Sciences Appliquées, France; 5University of applied Sciences of Western Switzerland, Switzerland

We reviewed the various definitions of First Flush (FF) investigated in the last half century.

We applied the different FF definitions to a high-resolution dataset of 363 events.

We showed that First Flush is observed in only a minor fraction of the observed events, highlighting the environmental risks using the FF concept for pollution control.

9:50am - 10:10am

New approach for condition-based sewer inspection combined with demand-based sewer cleaning assisted through innovative tools

Thomas Walter Ertl1, Hanns Plihal2, Karsten Kerres3

1University of Natural Resources and Life Sciences, Vienna, Austria; 2AEP Consulting ZT GmbH, Achau, Austria; 3University of Applied Sciences, Aachen, Germany

In Austria and Germany many sewer operators want to turn from mandatory interval-based cleaning and inspection to demand-based cleaning and condition-based inspection strategies. This requires new tools and technologies. So-called manhole-zoom cameras have been developed for a quick view into sewers. The novel aspect of that approach is the combination of a demand-based cleaning strategy with a condition-based inspection strategy by using alternative inspection tools. To conclude the new approach is promising for optimization of operational issues in sewer management and should be implemented in sewer utilities.

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