Some features of the ASCE Shopping cart and login features of the website will be down for maintenance on Sunday, June 16th, 2024, beginning at 12:00 A.M. ET and ending at 6:00 A.M. ET. During this time if you need immediate assistance at 1-800-548-2723 or [email protected].

Chapter
Apr 26, 2012

3D Sediment Transport Modeling of a Hyper-Eutrophic Lake

Publication: World Environmental and Water Resource Congress 2006: Examining the Confluence of Environmental and Water Concerns

Abstract

The dynamics of fine sediment resuspension in Newnans Lake (mean depth of 1.6m and area 27 km2) in north-central Florida was examined using the 3D EFDC model as part of a study to identify the mechanism by which sediment is released from a pliant, 2-m thick muck-laden bottom. Wind not only generates the waves, but it creates a variable wave field, and results in a weak correlation of the total suspended solids (TSS) with wind and waves. At an instrument platform towards the south end of the lake, physical and water quality parameters were measured from December 2003 to September 2004. There are two tributaries in the north end of the lake, which carry sediment into the lake. Part of the sediment load deposits in the lake and the remainder is transported out of the south end of the lake in Prairie Creek. The EFDC model was used to simulate the hydrodynamics and cohesive sediment transport in the lake. The hydrodynamic model was able to predict the measured water surface elevation and both the inflow and outflow discharges were very close to the measured values. Sediment properties (bulk density, organic content, settling velocity, bed shear strength, etc.) used in the model was determined using laboratory experiments on core and water column samples collected in the lake. The highly organic lake sediment has very low bed shear strength and a low settling velocity, this resulted in a fairly constant background concentration of 50 mg/L in the water column. The model was calibrated to achieve an optimal agreement between the measured and predicted vertical suspended sediment concentration profiles at the tower. The sediment transport model was adequately validated by comparing the measured and predicted sediment loads in Prairie Creek. The results from the calibrated and validated sediment transport model, that predicted both current and wave-induced resuspension of the sediment, showed more fluctuations in the simulated TSS time series than that seen in the measured time series. The major spikes in the suspended solids (TSS) data (recorded at the tower) were correlated with sediments transported by the tributaries into the lake during a runoff event. The magnitude and timing of these runoff-induced TSS spikes were adequately predicted by the model.

Get full access to this chapter

View all available purchase options and get full access to this chapter.

Information & Authors

Information

Published In

Go to World Environmental and Water Resource Congress 2006
World Environmental and Water Resource Congress 2006: Examining the Confluence of Environmental and Water Concerns
Pages: 1 - 8

History

Published online: Apr 26, 2012

Permissions

Request permissions for this article.

ASCE Technical Topics:

Authors

Affiliations

Mamta Jain
S.M.ASCE
Graduate student, University of Florida, Gainsville, FL

Metrics & Citations

Metrics

Citations

Download citation

If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.

View Options

Get Access

Access content

Please select your options to get access

Log in/Register Log in via your institution (Shibboleth)
ASCE Members: Please log in to see member pricing

Purchase

Save for later Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.

Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
ASCE Library Card (5 downloads)
$105.00
Add to cart
ASCE Library Card (20 downloads)
$280.00
Add to cart
Buy Single Paper
$35.00
Add to cart

Get Access

Access content

Please select your options to get access

Log in/Register Log in via your institution (Shibboleth)
ASCE Members: Please log in to see member pricing

Purchase

Save for later Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.

Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
ASCE Library Card (5 downloads)
$105.00
Add to cart
ASCE Library Card (20 downloads)
$280.00
Add to cart
Buy Single Paper
$35.00
Add to cart

Media

Figures

Other

Tables

Share

Share

Copy the content Link

Share with email

Email a colleague

Share