Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study

Vlad Nikora, Scott Larned, Nina Nikora, Koustuv Debnath, Glenn Cooper, Mike Reid

    Research output: Contribution to journalArticle

    65 Citations (Scopus)

    Abstract

    This technical note examines vegetation effects on hydraulic resistance in small streams and suggests simple quantitative relationships for predicting and quantifying these effects using the plant characteristics with the greatest explanatory power. In particular, we examine the effects of aquatic plant biomass, stature, and architecture on hydraulic performance of five New Zealand streams representing a wide range of channel dimensions, flows, aquatic plant species, and assemblages. Comparisons among the vegetation parameters indicated that ratios of the site-averaged canopy height to the mean flow depth and of the site-averaged plant length to the mean flow depth were the best roughness descriptors. Effects of individual plant species and their characteristic patch patterns were not significant. The data from all sites collapsed around single lines, suggesting that general physical parameters of vegetation should be the primary determinants of hydraulic resistance in streams studied, not species-specific parameters, as often assumed.

    Original languageEnglish
    Pages (from-to)1326-1332
    Number of pages7
    JournalJournal of Hydraulic Engineering
    Volume134
    Issue number9
    Publication statusPublished - 2008

    Fingerprint

    Hydraulics
    hydraulics
    vegetation
    aquatic plant
    Biomass
    Surface roughness
    roughness
    canopy
    field study
    effect
    biomass
    parameter
    plant species

    Cite this

    Nikora, V., Larned, S., Nikora, N., Debnath, K., Cooper, G., & Reid, M. (2008). Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study. Journal of Hydraulic Engineering, 134(9), 1326-1332.
    Nikora, Vlad ; Larned, Scott ; Nikora, Nina ; Debnath, Koustuv ; Cooper, Glenn ; Reid, Mike. / Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study. In: Journal of Hydraulic Engineering. 2008 ; Vol. 134, No. 9. pp. 1326-1332.
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    abstract = "This technical note examines vegetation effects on hydraulic resistance in small streams and suggests simple quantitative relationships for predicting and quantifying these effects using the plant characteristics with the greatest explanatory power. In particular, we examine the effects of aquatic plant biomass, stature, and architecture on hydraulic performance of five New Zealand streams representing a wide range of channel dimensions, flows, aquatic plant species, and assemblages. Comparisons among the vegetation parameters indicated that ratios of the site-averaged canopy height to the mean flow depth and of the site-averaged plant length to the mean flow depth were the best roughness descriptors. Effects of individual plant species and their characteristic patch patterns were not significant. The data from all sites collapsed around single lines, suggesting that general physical parameters of vegetation should be the primary determinants of hydraulic resistance in streams studied, not species-specific parameters, as often assumed.",
    author = "Vlad Nikora and Scott Larned and Nina Nikora and Koustuv Debnath and Glenn Cooper and Mike Reid",
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    Nikora, V, Larned, S, Nikora, N, Debnath, K, Cooper, G & Reid, M 2008, 'Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study', Journal of Hydraulic Engineering, vol. 134, no. 9, pp. 1326-1332.

    Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study. / Nikora, Vlad; Larned, Scott; Nikora, Nina; Debnath, Koustuv; Cooper, Glenn; Reid, Mike.

    In: Journal of Hydraulic Engineering, Vol. 134, No. 9, 2008, p. 1326-1332.

    Research output: Contribution to journalArticle

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    AU - Nikora, Vlad

    AU - Larned, Scott

    AU - Nikora, Nina

    AU - Debnath, Koustuv

    AU - Cooper, Glenn

    AU - Reid, Mike

    PY - 2008

    Y1 - 2008

    N2 - This technical note examines vegetation effects on hydraulic resistance in small streams and suggests simple quantitative relationships for predicting and quantifying these effects using the plant characteristics with the greatest explanatory power. In particular, we examine the effects of aquatic plant biomass, stature, and architecture on hydraulic performance of five New Zealand streams representing a wide range of channel dimensions, flows, aquatic plant species, and assemblages. Comparisons among the vegetation parameters indicated that ratios of the site-averaged canopy height to the mean flow depth and of the site-averaged plant length to the mean flow depth were the best roughness descriptors. Effects of individual plant species and their characteristic patch patterns were not significant. The data from all sites collapsed around single lines, suggesting that general physical parameters of vegetation should be the primary determinants of hydraulic resistance in streams studied, not species-specific parameters, as often assumed.

    AB - This technical note examines vegetation effects on hydraulic resistance in small streams and suggests simple quantitative relationships for predicting and quantifying these effects using the plant characteristics with the greatest explanatory power. In particular, we examine the effects of aquatic plant biomass, stature, and architecture on hydraulic performance of five New Zealand streams representing a wide range of channel dimensions, flows, aquatic plant species, and assemblages. Comparisons among the vegetation parameters indicated that ratios of the site-averaged canopy height to the mean flow depth and of the site-averaged plant length to the mean flow depth were the best roughness descriptors. Effects of individual plant species and their characteristic patch patterns were not significant. The data from all sites collapsed around single lines, suggesting that general physical parameters of vegetation should be the primary determinants of hydraulic resistance in streams studied, not species-specific parameters, as often assumed.

    M3 - Article

    VL - 134

    SP - 1326

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    JO - American Society of Civil Engineers, Journal of the Hydraulics Division

    JF - American Society of Civil Engineers, Journal of the Hydraulics Division

    SN - 0733-9429

    IS - 9

    ER -

    Nikora V, Larned S, Nikora N, Debnath K, Cooper G, Reid M. Hydraulic Resistance due to Aquatic Vegetation in Small Streams: Field Study. Journal of Hydraulic Engineering. 2008;134(9):1326-1332.