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Stream development in Glacier Bay National Park, Alaska, USA
Journal article   Peer reviewed

Stream development in Glacier Bay National Park, Alaska, USA

Roy C Sidle and A M Milner
Arctic and Alpine Research, Vol.21(4), pp.350-363
1989
url
https://doi.org/10.2307/1551645View
Published Version

Abstract

channel condition chronosequence fish habitat glacial outwash deposit hydraulics riparian vegetation sediment supply stream development Alaska Glacier Bay National Park
The effects of hydraulics, sediment supply, channel condition, and riparian vegetation on stream development were examined in a chronosequence of five streams in Glacier Bay National Park. The youngest stream, Wolf Point Creek (deglaciated around 1955), is fed by a remnant glacier and had the highest suspended sediment concentrations of all streams (103-111mg litre-1 at baseflows). The study reach at Nunatak Creek (deglaciated around 1950) was actively downcutting through the fine glacial outwash deposits creating a deeper thalweg and redepositing some material near channel margins. About 100yr after deglaciation (Ice Valley stream), woody riparian vegetation begins to stabilize streambanks and becomes established on gravel bars where it provides potential sites for incipient woody debris dams. Berg Bay South (deglaciated around 1830) appears to be near equilibrium with respect to sediment supply and transport. -from Authors

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Environmental Sciences
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#14 Life Below Water
#15 Life on Land

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