Journal
HYDROBIOLOGIA
Volume 598, Issue -, Pages 409-415Publisher
SPRINGER
DOI: 10.1007/s10750-007-9159-1
Keywords
hydrologic banding; transport and mixing; floodplain; Yolo Bypass; Sacramento River; San Francisco Estuary
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Where tributaries meet, certain conditions of flow and topography often result in incomplete mixing and the formation of spatially and temporally persistent plumes or bands. Yolo Bypass, the primary floodplain of the lower Sacramento River (California, USA), provides an extreme example of this effect. Inspection of recent and historical aerial photographs revealed that the four major tributaries of Yolo Bypass typically do not substantially mix laterally within the floodplain. The phenomenon is notable in the number of tributaries involved (4), the distance over which the bands remain distinct (> 61 km), and the persistence of the bands despite channel constrictions and long cross-wind fetch. This effect demonstrates the importance of lateral variability during floodplain flow events, including transport and distribution of chemical constituents, and habitat for fish and other organisms that use floodplains as migration corridors and rearing areas.
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