Réponses riveraines à la réduction des débits de crue: Comparaison et différences entre peupliers à feuilles larges et à feuilles étroites

Translated title of the contribution: Riparian responses to reduced flood flows: Comparing and contrasting narrowleaf and broadleaf cottonwoods

T.K. Wilding, Barbara J S Sanderson, D.M. Merritt, S.B. Rood, LeRoy POFF

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    To enable assessment of risks of water management to riparian ecosystems at a regional scale, we developed a quantile-regression model of abundance of broadleaf cottonwoods (Populus deltoides and P. fremontii) as a function of flood flow attenuation. To test whether this model was transferrable to narrowleaf cottonwood (Populus angustifolia), we measured narrowleaf abundance along 39 river reaches in northwestern Colorado, USA. The model performed well for narrowleaf in all 32 reaches where reservoir storage was <75% of mean annual flow. Field data did not fit the model at four of seven reaches where reservoir storage was >90% of mean annual flow. In these four reaches, narrowleaf was abundant despite peak flow attenuation of 45-61%. Poor model performance in these four reaches may be explained in part by a pulse of narrowleaf cottonwood expansion as a response to channel narrowing and in part by differences between narrowleaf and broadleaf cottonwood response to floods and drought. Editor Z.W. Kundzewicz; Guest editor M. AcremanCitation Wilding, T.K. Sanderson, J.S. Merritt, D.M. Rood, S.B. and Poff, N.L. 2014. Riparian responses to reduced flood flows: comparing and contrasting narrowleaf and broadleaf cottonwoods. Hydrological Sciences Journal, 59 (3-4), 605-617.

    Original languageFrench
    Pages (from-to)605-617
    Number of pages13
    JournalHydrological Sciences Journal
    Volume59
    Issue number3-4
    DOIs
    Publication statusPublished - 2014

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