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Related Experiment Video

Updated: Jul 4, 2026

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

Sewer modelling based on highly distributed calibration data sets and multi-objective auto-calibration schemes.

D Muschalla¹, S Schneider, K Schröter

¹Technische Universität Darmstadt, Institute of Hydraulic and Water Resources, Petersenstrasse 13, D-64287, Darmstadt, Germany. muschalla@ihwb.tu-darmstadt.de

Water Science and Technology : a Journal of the International Association on Water Pollution Research

|June 4, 2008

Summary

This study optimizes sewer pollutant load models using auto-calibration, achieving satisfying results for dry and storm weather. The build-up wash-off model with basic equations performed best, though convective storms require further research.

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Last Updated: Jul 4, 2026

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

Published on: July 25, 2025

Area of Science:

Environmental Engineering
Hydrology
Water Quality Management

Background:

Sewer pollutant load modelling is crucial for management strategies.
Conventional calibration data sets are often limited.
Long-term, high-resolution monitoring data from Graz West catchment area is available since 2002.

Purpose of the Study:

To apply and compare single- and multi-objective auto-calibration schemes for a deterministic hydrological pollutant load model.
To evaluate three pollutant load modelling approaches: constant storm concentration, and build-up wash-off with basic and extended equations.

Main Methods:

Utilized evolution strategies for single- and multi-objective auto-calibration.
Applied a deterministic hydrological pollutant load model.
Compared three pollutant load modelling approaches: constant concentration, basic build-up wash-off, and extended build-up wash-off.

Main Results:

The auto-calibration method yielded highly satisfactory results for calibration and validation datasets, covering both dry and storm weather runoff.
The build-up wash-off approach with the basic wash-off equation demonstrated the best correlation between measured data and simulation results.
Convective storms were not convincingly represented by the current models.

Conclusions:

Auto-calibration schemes provide effective pollutant load modelling for sewer systems.
The basic build-up wash-off model is recommended for its superior performance.
Further refinement of multi-objective optimisation criteria is needed to address sensitivity to measurement errors and improve convective storm representation.