Quantitative potentials for rainwater handling using the “Three Points Approach” (3PA)

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Abstract

Rainwater in cities is both a resource for e.g. recreational and amenity purposes and a potential problem due to e.g. pluvial flooding. This study provides a new tool to communicate the potentials for alternative rainwater handling taking into account the properties of rainfall making it both a problem and a resource. The quantitative potentials of alternative rainwater handling are calculated in relation to the total precipitation volume, the total supplied potable water volume and the total volume of wastewater treated. Two different cases are investigated: one where rainwater is infiltrated and one where it is harvested and used for toilet flushing. The potential is calculated for the two largest municipalities of Denmark: Copenhagen and Aarhus. The Three Points Approach is used to distinguish between different rain domains, and to subdivide the quantitative potentials accordingly. This analysis shows that designing alternative rainwater handling systems for larger return periods than 5 to 10 years result in a very marginal increase in rainwater volume handled by these systems compared to systems designed for less severe events.
Original languageEnglish
Publication date2013
Number of pages9
Publication statusPublished - 2013
Event8th International Conference on Planning and Technologies for Sustainable Urban Water Management - Lyon, France
Duration: 23 Jun 201327 Jun 2013
http://www.novatech.graie.org/a_index.php

Conference

Conference8th International Conference on Planning and Technologies for Sustainable Urban Water Management
CountryFrance
CityLyon
Period23/06/201327/06/2013
Internet address

Keywords

  • Alternative rainwater handling
  • Rainwater
  • Rainwater harvesting
  • Three oints aporach

Cite this

Sørup, H. J. D., Arnbjerg-Nielsen, K., Mikkelsen, P. S., & Rygaard, M. (2013). Quantitative potentials for rainwater handling using the “Three Points Approach” (3PA). Paper presented at 8th International Conference on Planning and Technologies for Sustainable Urban Water Management, Lyon, France.