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Estimation of the in-situ settling velocity of particles in lakes using a time series sediment trap

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Douglas, RW, Rippey, B and Gibson, CE (2003) Estimation of the in-situ settling velocity of particles in lakes using a time series sediment trap. FRESHWATER BIOLOGY, 48 (3). pp. 512-518. [Journal article]

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Abstract

1. We outline a simple method for estimating the in-situ settling velocity of particles in wind disturbed lakes. The total sedimentation rate (primary and secondary sedimentation) was measured during storm events in two lakes using a time series sediment trap. 2. The sediment trap had 12 sample bottles which were programmed to open for periods of 3-4 h, giving total deployment times ranging from 36 to 48 h. 3. Wave mixed layer theory was used to infer if and when sediment resuspension occurred and the first order rate equation was used to estimate the settling velocity of resuspended particles. 4. The settling velocity during three resuspension events in Lough Neagh and one in Lough Macnean were 34.3, 29.5, 24.1 and 77.3 m day(-1), respectively. These are similar to values obtained using recent in-situ video imaging in marine environments, but much larger than previous lake sediment trap studies.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Environmental Sciences
Research Institutes and Groups:Environmental Sciences Research Institute
Environmental Sciences Research Institute > Freshwater Sciences
ID Code:12343
Deposited By:Dr Richard Douglas
Deposited On:09 Mar 2010 09:37
Last Modified:15 Jun 2011 11:16

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