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Related Experiment Videos

Infiltration and inflow in combined sewer systems: long-term analysis.

G Weiss1, H Brombach, B Haller

  • 1Umwelt- und Fluid-Technik Dr. H. Brombach GmbH, Bad Mergentheim, Germany. uft@uft.mayn.de

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|May 7, 2002
PubMed
Summary

Reducing infiltration and inflow (I/I) in combined sewer systems significantly improves stormwater treatment performance. This study highlights I/I as a major bottleneck, often underestimated in urban hydrology management.

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Area of Science:

  • Urban Hydrology
  • Wastewater Engineering
  • Environmental Science

Background:

  • Combined sewer systems face challenges in stormwater treatment due to hidden reserves and bottlenecks.
  • Undesired infiltration and inflow (I/I) of non-polluted water is a significant, underestimated issue in drainage systems.
  • I/I negatively impacts the performance of sewer systems, despite the inflowing water being non-polluted.

Purpose of the Study:

  • To identify hidden reserves and bottlenecks in stormwater treatment within German combined sewer systems.
  • To provide insights into water pathways in urban hydrology.
  • To emphasize the impact of infiltration and inflow (I/I) on drainage system performance.

Main Methods:

  • Analysis of 34 German combined sewer systems, including combined sewer overflow (CSO) tanks and treatment plants.

Related Experiment Videos

  • Focus on quantifying and understanding the phenomenon of infiltration and inflow (I/I).

    • Main Results:

    • Infiltration and inflow (I/I) is a major, underestimated factor affecting the performance of combined sewer systems.
    • Reducing I/I can substantially improve pollution control in existing combined systems.
    • Artificial infiltration of surface runoff may exacerbate I/I issues.

    Conclusions:

    • Effective management of infiltration and inflow (I/I) is crucial for optimizing stormwater treatment in urban areas.
    • Reducing I/I offers comparable benefits to separate drainage systems for pollution control.
    • Further research and practical strategies are needed to mitigate I/I in combined sewer networks.