Towards defining geomorphic rarity and vulnerability; use of River Styles in High Ecological Value Aquatic Ecosystems (HEVAE)

Fergus Hancock*, Kirstie Fryirs, Michael Healey, Allan Raine

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

    Abstract

    Unlike in the field of ecology, defining geomorphic rarity of river systems has received relatively little attention. The fluvial geomorphology literature contains references to forms of rarity, denoting uncommonness (continental to basin scale rarity), unique geo-ecological relationships or vulnerability to alteration or
    destruction since European occupation of Australia. In this paper, we present a process to identify rarity in identified river forms defined using the River Styles Framework (Brierley and Fryirs 2005). A definition of geomorphic rarity for use in High Ecological Value Aquatic Ecosystems (HEVAE) has been made on the basis
    of: uncommonness meaning absolute rarity or endemism of a River Style, fragmentation where isolated remnants of a particular River Style occur, susceptibility where a River Style has a very low proportion of reaches in good condition or in moderate condition with rapid potential for geomorphic recovery, and vulnerability to alteration whereby geomorphic forms are under threat - directly or indirectly. Completion of NSW River Styles mapping now allows more detailed examination of risk to in-stream value matched to hydrologic stress modelling.
    Original languageEnglish
    Title of host publicationProceedings of the 9th Australian Stream Management Conference, 12–15 August 2018, Hobart, Tasmania
    EditorsGeoff J. Vietz, Ian D. Rutherfurd
    Place of PublicationMelbourne, Victoria
    PublisherRiver Basin Management Society
    Pages705-712
    Number of pages8
    ISBN (Print)9780734054555
    Publication statusPublished - 2018
    EventAustralian Stream Management Conference (9th : 2018) - Hobart, Australia
    Duration: 12 Aug 201815 Aug 2018
    Conference number: 9th
    http://www.9asm.org.au/

    Conference

    ConferenceAustralian Stream Management Conference (9th : 2018)
    CountryAustralia
    CityHobart
    Period12/08/1815/08/18
    Internet address

    Keywords

    • Geomorphic rarity
    • riverine evolution
    • disturbance
    • high ecological value ecosystems

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