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    Author(s): Thomas E. Lisle
    Date: 1989
    Source: In: D. L. Abell (ed.) Proceedings of the California Riparian Systems Conference: 22-24 September 1988, Davis, California. USDA Forest Service General Technical Report PSW-110. p. 9-13.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (144 KB)

    Description

    Abstract - Large floods in northwestern California in the past two decades have mobilized extensive areas of valley floors, removed streamside trees, and widened channels. Channel cross sections were surveyed to illustrate an hypothesis on the linkage between sediment transport, colonization of channel margins by trees, and streambank recovery. Riparian trees, e.g., white alder (Alnus rhombifolia), colonize the water's edge at low flow to receive adequate moisture during the dry season. Such stands can endure annual high flows only after the flood-enhanced sediment load declines and the width of the annually mobile bed contracts to the low-flow width. Streambank formation along the low-flow margin can then proceed by deposition of fine sediment and organic debris.

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    Citation

    Lisle, Thomas E. 1989. Channel-dynamic control on the establishment of riparian trees after large floods in northwestern California. In: D. L. Abell (ed.) Proceedings of the California Riparian Systems Conference: 22-24 September 1988, Davis, California. USDA Forest Service General Technical Report PSW-110. p. 9-13.

    Keywords

    PSW4351, flood, channel cross sections, riparian ecosystems, channel aggradation, streambanks, streambeds, floodplains, high shear stress, channel morphology

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