Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska
Abstract Hydrogemorphic linkages related to sediment transport in headwater streams following basin wide clear‐cut logging on Prince of Wales Island, southeast Alaska, were investigated. Landslides and debris flows transported sediment and woody debris in headwater tributaries in 1961, 1979, and 199...
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crwiley:10.1002/hyp.1366 2024-09-15T18:31:35+00:00 Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska Gomi, Takashi Sidle, Roy C. Swanston, Douglas N. 2004 http://dx.doi.org/10.1002/hyp.1366 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.1366 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.1366 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 18, issue 4, page 667-683 ISSN 0885-6087 1099-1085 journal-article 2004 crwiley https://doi.org/10.1002/hyp.1366 2024-07-25T04:18:45Z Abstract Hydrogemorphic linkages related to sediment transport in headwater streams following basin wide clear‐cut logging on Prince of Wales Island, southeast Alaska, were investigated. Landslides and debris flows transported sediment and woody debris in headwater tributaries in 1961, 1979, and 1993. Widespread landsliding in 1961 and 1993 was triggered by rainstorms with recurrence intervals (24 h precipitation) of 7·0 years and 4·2 years respectively. Occurrence, distribution, and downstream effects of these mass movements were controlled by landform characteristics such as channel gradient and valley configuration. Landslides and channelized debris flows created exposed bedrock reaches, log jams, fans, and abandoned channels. The terminus of the deposits did not enter main channels because debris flows spread and thinned on the unconfined bottom of the U‐shaped glaciated valley. Chronic sediment input to channels included surface erosion of exposed till (rain splash, sheet erosion, and freeze–thaw action) and bank failures. Bedload sediment transport in a channel impacted by 1993 landslides and debris flows was two to ten times greater and relatively finer compared with bedload transport in a young alder riparian channel that had last experienced a landslide and debris flow in 1961. Sediment transport and storage were influenced by regeneration of riparian vegetation, storage behind recruited woody debris, development of a streambed armour layer, and the decoupling of hillslopes and channels. Both spatial and temporal variations of sediment movement and riparian condition are important factors in understanding material transport within headwaters and through channel networks. Copyright © 2004 John Wiley & Sons, Ltd. Article in Journal/Newspaper Prince of Wales Island Alaska Wiley Online Library Hydrological Processes 18 4 667 683 |
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Wiley Online Library |
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English |
description |
Abstract Hydrogemorphic linkages related to sediment transport in headwater streams following basin wide clear‐cut logging on Prince of Wales Island, southeast Alaska, were investigated. Landslides and debris flows transported sediment and woody debris in headwater tributaries in 1961, 1979, and 1993. Widespread landsliding in 1961 and 1993 was triggered by rainstorms with recurrence intervals (24 h precipitation) of 7·0 years and 4·2 years respectively. Occurrence, distribution, and downstream effects of these mass movements were controlled by landform characteristics such as channel gradient and valley configuration. Landslides and channelized debris flows created exposed bedrock reaches, log jams, fans, and abandoned channels. The terminus of the deposits did not enter main channels because debris flows spread and thinned on the unconfined bottom of the U‐shaped glaciated valley. Chronic sediment input to channels included surface erosion of exposed till (rain splash, sheet erosion, and freeze–thaw action) and bank failures. Bedload sediment transport in a channel impacted by 1993 landslides and debris flows was two to ten times greater and relatively finer compared with bedload transport in a young alder riparian channel that had last experienced a landslide and debris flow in 1961. Sediment transport and storage were influenced by regeneration of riparian vegetation, storage behind recruited woody debris, development of a streambed armour layer, and the decoupling of hillslopes and channels. Both spatial and temporal variations of sediment movement and riparian condition are important factors in understanding material transport within headwaters and through channel networks. Copyright © 2004 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Gomi, Takashi Sidle, Roy C. Swanston, Douglas N. |
spellingShingle |
Gomi, Takashi Sidle, Roy C. Swanston, Douglas N. Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
author_facet |
Gomi, Takashi Sidle, Roy C. Swanston, Douglas N. |
author_sort |
Gomi, Takashi |
title |
Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
title_short |
Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
title_full |
Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
title_fullStr |
Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
title_full_unstemmed |
Hydrogeomorphic linkages of sediment transport in headwater streams, Maybeso Experimental Forest, southeast Alaska |
title_sort |
hydrogeomorphic linkages of sediment transport in headwater streams, maybeso experimental forest, southeast alaska |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/hyp.1366 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.1366 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.1366 |
genre |
Prince of Wales Island Alaska |
genre_facet |
Prince of Wales Island Alaska |
op_source |
Hydrological Processes volume 18, issue 4, page 667-683 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.1366 |
container_title |
Hydrological Processes |
container_volume |
18 |
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4 |
container_start_page |
667 |
op_container_end_page |
683 |
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1810473290139959296 |