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

Hjalte Jomo Danielsen Sørup, Karsten Arnbjerg-Nielsen, Peter Steen Mikkelsen, Martin Rygaard

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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.
    Translated title of the contributionQuantitative potentials for rainwater handling using the “Three Points Approach” (3PA)
    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
    Country/TerritoryFrance
    CityLyon
    Period23/06/201327/06/2013
    Internet address

    Keywords

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

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