Hdl Handle:
http://hdl.handle.net/10034/601060
Title:
Impact of large instream logs on river bank erosion
Authors:
Zhang, Nuosha; Rutherfurd, Ian; Marren, Philip M.
Abstract:
There has been abundant research into the effect of tree roots on stabilizing river banks, and also on the effect of trees on bed-scour after they have fallen into the stream, but there is little research into the effect of instream logs on bank erosion. Here we develop the hydraulic theory that predicts local and reach scale bank erosion associated with instream logs with various configurations and distributions and conclude that individual log can increase local bank erosion, but multiple logs can reduce overall reach erosion. Where there is consistent bank strength, the local erosion varies in a non-linear way with the angle, size and position of the log. The reach scale effect of multiple logs depends on the distribution of logs and the proportion of the reach occupied by logs. Erosion effects of instream logs are difficult to measure. We are testing the above theory of erosion associated with instream logs in a series of anabranches of different sizes that experience consistent irrigation flows each year (on the Murray River in SE Australia). These channels have high erosion rates, abundant logs, and are like a giant flume that allows us to measure erosion processes, as well as hydraulics, in a controlled setting.
Affiliation:
University of Melbourne (Zhang, Rutherfurd); University of Chester (Marren)
Citation:
Zhang, N., Rutherfurd, I., & Marren, P. (2016). Impact of large instream logs on river bank erosion. Proceedings of the 11th International Symposium on Ecohydraulics, Melbourne. Paper 25971.
Publisher:
11th International Symposium on Ecolhydraulics / asn events
Publication Date:
Feb-2016
URI:
http://hdl.handle.net/10034/601060
Additional Links:
https://asnevents.s3.amazonaws.com/Abstrakt-FullPaper/25971-Zhang_25971_FINAL.pdf
Type:
Meetings and Proceedings
Language:
en
Appears in Collections:
Geography and Development Studies

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Nuoshaen
dc.contributor.authorRutherfurd, Ianen
dc.contributor.authorMarren, Philip M.en
dc.date.accessioned2016-03-09T19:19:12Zen
dc.date.available2016-03-09T19:19:12Zen
dc.date.issued2016-02en
dc.identifier.citationZhang, N., Rutherfurd, I., & Marren, P. (2016). Impact of large instream logs on river bank erosion. Proceedings of the 11th International Symposium on Ecohydraulics, Melbourne. Paper 25971.en
dc.identifier.urihttp://hdl.handle.net/10034/601060en
dc.description.abstractThere has been abundant research into the effect of tree roots on stabilizing river banks, and also on the effect of trees on bed-scour after they have fallen into the stream, but there is little research into the effect of instream logs on bank erosion. Here we develop the hydraulic theory that predicts local and reach scale bank erosion associated with instream logs with various configurations and distributions and conclude that individual log can increase local bank erosion, but multiple logs can reduce overall reach erosion. Where there is consistent bank strength, the local erosion varies in a non-linear way with the angle, size and position of the log. The reach scale effect of multiple logs depends on the distribution of logs and the proportion of the reach occupied by logs. Erosion effects of instream logs are difficult to measure. We are testing the above theory of erosion associated with instream logs in a series of anabranches of different sizes that experience consistent irrigation flows each year (on the Murray River in SE Australia). These channels have high erosion rates, abundant logs, and are like a giant flume that allows us to measure erosion processes, as well as hydraulics, in a controlled setting.en
dc.language.isoenen
dc.publisher11th International Symposium on Ecolhydraulics / asn eventsen
dc.relation.urlhttps://asnevents.s3.amazonaws.com/Abstrakt-FullPaper/25971-Zhang_25971_FINAL.pdfen
dc.subjectFluvial geomorphologyen
dc.subjectHydraulicsen
dc.subjectErosionen
dc.subjectVegetationen
dc.titleImpact of large instream logs on river bank erosionen
dc.typeMeetings and Proceedingsen
dc.contributor.departmentUniversity of Melbourne (Zhang, Rutherfurd); University of Chester (Marren)en
dc.identifier.url: http://ise-2016.m.asnevents.com.au/schedule/session/8092/abstract/25971en
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