✦ LIBER ✦

Magnitude and variation in the contribution of bank erosion to the suspended sediment load of the River Severn, UK

✍ Scribed by Bull, Louise J.

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 446 KB
Volume: 22
Category: Article
ISSN: 0360-1269
DOI: 10.1002/(sici)1096-9837(199712)22:12<1109::aid-esp810>3.0.co;2-o

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✦ Synopsis

The wide range of studies describing the role of bank erosion in fluvial sediment supply have mostly lumped amounts of bank erosion into coarse temporal units, such as years. This paper investigates sediment yields from individual bank erosion events within the upper River Severn, UK (basin area 380 km 2 ). Manual erosion pins and photo-electronic erosion pins were used to estimate bank erosion, and turbidity meters were used to determine suspended sediment transport. At the annual timescale, the silt-clay fraction of bank-derived sediment accounted for an equivalent of 17 per cent of the suspended load, increasing to an average of 38 per cent at the monthly timescale, and then to an average of 64 per cent at the event timescale. This research highlighted that for an upland catchment, bank erosion was an important supply of suspended sediment, and that for some flood events bank erosion can supply more sediment than is transported.

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