Use of historic water level records for re-assessing flood frequency

case study of the Spey catchment

Andrew R. Black, David Fadipe

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Flood levels are available for four river flow gauging station sites in the Spey catchment, northern Scotland, for the major floods of 1768 and 1829. Field survey and Manning's equation were used to estimate peak discharge for each of the historic flood levels, to assist with the assessment of flood frequency. Standard UK methods encourage the use of historical information, but uptake presently appears to be limited. Compared with pooling and single site analyses, graphical re-assessments of frequency incorporating estimated historical flows represented increases in the 100-year flood of between 15 and 116%, illustrating that historical information may lead to major shifts in estimated frequency. These results are preferred over pooling results particularly because of the mismatch in the seasonality of major floods on the lower Spey compared with other sites available for pooling. Practitioners are urged to make use of historical flood information, subject to quality assessment, wherever possible.

    Original languageEnglish
    Pages (from-to)23-31
    Number of pages9
    JournalWater and Environment Journal
    Volume23
    Issue number1
    DOIs
    Publication statusPublished - Mar 2009

    Keywords

    • flood frequency analysis
    • graphical adjustment
    • historical information
    • pooling
    • River Spey
    • SEASONALITY
    • CHRONOLOGY
    • SCOTLAND
    • IMPACT
    • TAY

    Cite this

    @article{c9f355edfeac4cbe992cc4f3e76592fa,
    title = "Use of historic water level records for re-assessing flood frequency: case study of the Spey catchment",
    abstract = "Flood levels are available for four river flow gauging station sites in the Spey catchment, northern Scotland, for the major floods of 1768 and 1829. Field survey and Manning's equation were used to estimate peak discharge for each of the historic flood levels, to assist with the assessment of flood frequency. Standard UK methods encourage the use of historical information, but uptake presently appears to be limited. Compared with pooling and single site analyses, graphical re-assessments of frequency incorporating estimated historical flows represented increases in the 100-year flood of between 15 and 116{\%}, illustrating that historical information may lead to major shifts in estimated frequency. These results are preferred over pooling results particularly because of the mismatch in the seasonality of major floods on the lower Spey compared with other sites available for pooling. Practitioners are urged to make use of historical flood information, subject to quality assessment, wherever possible.",
    keywords = "flood frequency analysis, graphical adjustment, historical information, pooling, River Spey, SEASONALITY, CHRONOLOGY, SCOTLAND, IMPACT, TAY",
    author = "Black, {Andrew R.} and David Fadipe",
    year = "2009",
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    doi = "10.1111/j.1747-6593.2007.00105.x",
    language = "English",
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    journal = "Water and Environment Journal",
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    Use of historic water level records for re-assessing flood frequency : case study of the Spey catchment. / Black, Andrew R.; Fadipe, David.

    In: Water and Environment Journal, Vol. 23, No. 1, 03.2009, p. 23-31.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Use of historic water level records for re-assessing flood frequency

    T2 - case study of the Spey catchment

    AU - Black, Andrew R.

    AU - Fadipe, David

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    N2 - Flood levels are available for four river flow gauging station sites in the Spey catchment, northern Scotland, for the major floods of 1768 and 1829. Field survey and Manning's equation were used to estimate peak discharge for each of the historic flood levels, to assist with the assessment of flood frequency. Standard UK methods encourage the use of historical information, but uptake presently appears to be limited. Compared with pooling and single site analyses, graphical re-assessments of frequency incorporating estimated historical flows represented increases in the 100-year flood of between 15 and 116%, illustrating that historical information may lead to major shifts in estimated frequency. These results are preferred over pooling results particularly because of the mismatch in the seasonality of major floods on the lower Spey compared with other sites available for pooling. Practitioners are urged to make use of historical flood information, subject to quality assessment, wherever possible.

    AB - Flood levels are available for four river flow gauging station sites in the Spey catchment, northern Scotland, for the major floods of 1768 and 1829. Field survey and Manning's equation were used to estimate peak discharge for each of the historic flood levels, to assist with the assessment of flood frequency. Standard UK methods encourage the use of historical information, but uptake presently appears to be limited. Compared with pooling and single site analyses, graphical re-assessments of frequency incorporating estimated historical flows represented increases in the 100-year flood of between 15 and 116%, illustrating that historical information may lead to major shifts in estimated frequency. These results are preferred over pooling results particularly because of the mismatch in the seasonality of major floods on the lower Spey compared with other sites available for pooling. Practitioners are urged to make use of historical flood information, subject to quality assessment, wherever possible.

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    KW - historical information

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    KW - SEASONALITY

    KW - CHRONOLOGY

    KW - SCOTLAND

    KW - IMPACT

    KW - TAY

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