Hydrological response times in lowland urban catchments characterised by looped drainage systems

J. A.E. Ten Veldhuis, A. Skovgard Olsen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Hydrological response times are often used to characterise runoff processes. They provide information about temporal resolution of catchments responses, thus of the required measurement resolutions of in-situ sensors as well as spatial sensors like rainfall radars. The objective of this study was to characterise response times for urban catchments in lowland areas equipped with looped, combined sewer systems. Subcatchments size vary between 0.3 and 7.8 ha. The results show that variation in catchment area size can explain only a part of variation in lag times between the subcatchments. Pipe length per subcatchment explains variations in lag times to a similar, low degree. Comparison of lag time values for looped networks and constructed branched versions of the same networks shows that lag time values are influenced by flow between subcatchments in about half of the looped networks, especially during low flow conditions. This means that in looped systems subcatchment area per exit point varies during a storm event and lag time cannot be related to a single catchment characteristic.

Original languageEnglish
Title of host publication9th International Workshop on Precipitation in Urban Areas
Subtitle of host publicationUrban Challenges in Rainfall Analysis, UrbanRain 2012
PublisherETH Zürich
Pages290-294
Number of pages5
ISBN (Electronic)9783906031217
Publication statusPublished - 1 Jan 2017
Event9th International Workshop on Precipitation in Urban Areas: Urban Challenges in Rainfall Analysis, UrbanRain 2012 - St. Moritz, Switzerland
Duration: 6 Dec 20129 Dec 2012

Conference

Conference9th International Workshop on Precipitation in Urban Areas: Urban Challenges in Rainfall Analysis, UrbanRain 2012
CountrySwitzerland
CitySt. Moritz
Period6/12/129/12/12

Keywords

  • Hydrology
  • Response time
  • Urban drainage

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