Transverse mixing of transported material in simple and complex stream reaches

Stream ecologists often make assumptions about the extent to which transported materials (such as dissolved nutrients, particulate organic matter and pollutants) are mixed across the width of a channel. Transverse spatial heterogeneity arises whenever material enters the channel at a point or restri...

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Bibliographic Details
Published in:Hydrobiologia 2001-11, Vol.464 (1-3), p.207-218
Main Authors: HEARD, Stephen B, GIENAPP, Christopher B, LEMIRE, James F, HEARD, Kristie S
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Biological and medical sciences
Creeks & streams
Fresh water ecosystems
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Heterogeneity
Invertebrata
Particulate organic matter
Population genetics, reproduction patterns
Synecology
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Summary:Stream ecologists often make assumptions about the extent to which transported materials (such as dissolved nutrients, particulate organic matter and pollutants) are mixed across the width of a channel. Transverse spatial heterogeneity arises whenever material enters the channel at a point or restricted source, and is dissipated downstream as mixing evens out concentration gradients. A frequent assumption is that the distance required for complete mixing is negligibly short, and therefore that transverse heterogeneity in transported material is not to be expected. However, few mixing data are available for small (discharge
ISSN:0018-8158
1573-5117
DOI:10.1023/A:1013918122117