Natural flood management, land use and climate change trade-offs: the case of Tarland catchment, Scotland

Oana Iacob, Iain Brown (Lead / Corresponding author), John Rowan

    Research output: Contribution to journalArticle

    3 Citations (Scopus)
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    Abstract

    A distributed hydrological model (WASIM-ETH) was applied to a meso-scale catchment to investigate natural flood management as a non-structural approach to tackle flooding and climate change. Changes in peak flows were modelled using climate projections (UKCP09) in combination with afforestation-based land use change. Runoff projections showed a significant increase in peak flows from climate change. Afforestation could reduce some of the increased flow, with greatest benefit from coniferous afforestation, especially when replacing lowland farmland. Nevertheless, large-scale woodland expansion was required to maintain peak flows close to present and effects were reduced for more extreme floods. Afforestation was also modelled to increase risks of low flow episodes in summer. Evaluation using land-use scenarios showed catchment-scale trade-offs across multiple objectives were particularly complex when afforestation replaced lowland farmland. Hence, combined structural/non-structural measures may be required here and in similar catchments, with integrated catchment management to synergize across multiple objectives.
    Original languageEnglish
    Pages (from-to)1931-1948
    Number of pages17
    JournalHydrological Sciences Journal
    Volume62
    Issue number12
    Early online date22 Aug 2017
    DOIs
    Publication statusPublished - Aug 2017

    Fingerprint

    afforestation
    land use change
    catchment
    peak flow
    climate change
    agricultural land
    low flow
    woodland
    flooding
    runoff
    land use
    climate
    summer

    Keywords

    • climate change
    • land use change
    • hydrological modelling
    • catchment management
    • flood risk

    Cite this

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    title = "Natural flood management, land use and climate change trade-offs: the case of Tarland catchment, Scotland",
    abstract = "A distributed hydrological model (WASIM-ETH) was applied to a meso-scale catchment to investigate natural flood management as a non-structural approach to tackle flooding and climate change. Changes in peak flows were modelled using climate projections (UKCP09) in combination with afforestation-based land use change. Runoff projections showed a significant increase in peak flows from climate change. Afforestation could reduce some of the increased flow, with greatest benefit from coniferous afforestation, especially when replacing lowland farmland. Nevertheless, large-scale woodland expansion was required to maintain peak flows close to present and effects were reduced for more extreme floods. Afforestation was also modelled to increase risks of low flow episodes in summer. Evaluation using land-use scenarios showed catchment-scale trade-offs across multiple objectives were particularly complex when afforestation replaced lowland farmland. Hence, combined structural/non-structural measures may be required here and in similar catchments, with integrated catchment management to synergize across multiple objectives.",
    keywords = "climate change, land use change, hydrological modelling, catchment management, flood risk",
    author = "Oana Iacob and Iain Brown and John Rowan",
    note = "This work was supported by the Scottish Government through its ClimateXChange initiative and the Strategic Research Programme (Environmental Change).",
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    language = "English",
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    pages = "1931--1948",
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    Natural flood management, land use and climate change trade-offs : the case of Tarland catchment, Scotland. / Iacob, Oana; Brown, Iain (Lead / Corresponding author); Rowan, John.

    In: Hydrological Sciences Journal, Vol. 62, No. 12, 08.2017, p. 1931-1948.

    Research output: Contribution to journalArticle

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    T1 - Natural flood management, land use and climate change trade-offs

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    AU - Iacob, Oana

    AU - Brown, Iain

    AU - Rowan, John

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    AB - A distributed hydrological model (WASIM-ETH) was applied to a meso-scale catchment to investigate natural flood management as a non-structural approach to tackle flooding and climate change. Changes in peak flows were modelled using climate projections (UKCP09) in combination with afforestation-based land use change. Runoff projections showed a significant increase in peak flows from climate change. Afforestation could reduce some of the increased flow, with greatest benefit from coniferous afforestation, especially when replacing lowland farmland. Nevertheless, large-scale woodland expansion was required to maintain peak flows close to present and effects were reduced for more extreme floods. Afforestation was also modelled to increase risks of low flow episodes in summer. Evaluation using land-use scenarios showed catchment-scale trade-offs across multiple objectives were particularly complex when afforestation replaced lowland farmland. Hence, combined structural/non-structural measures may be required here and in similar catchments, with integrated catchment management to synergize across multiple objectives.

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