scholarly journals Investigation of interbasin exchange and interannual variability in Lake Erie using an unstructured-grid hydrodynamic model

2015 ◽  
Vol 120 (3) ◽  
pp. 2212-2232 ◽  
Author(s):  
Qianru Niu ◽  
Meng Xia ◽  
Edward S. Rutherford ◽  
Doran M. Mason ◽  
Eric J. Anderson ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Hydrodynamic Model ◽  
Lake Erie ◽  
Unstructured Grid ◽  
Interbasin Exchange

Utilization of the Northern Gulf Operational Forecast System to Predict Trajectories of Surface Oil from a Persistent Source Offshore of the Mississippi River Delta

2014 ◽  
Vol 2014 (1) ◽  
pp. 531-543 ◽  
Author(s):  
Amy MacFadyen ◽  
Eugene Wei ◽  
Christopher Warren ◽  
Charlie Henry ◽  
Glen Watabayashi
Keyword(s):  
Mississippi River ◽  
Hydrodynamic Model ◽  
Unstructured Grid ◽  
River Delta ◽  
Grid Resolution ◽  
Mississippi River Delta ◽  
Forecast System ◽  
Structured Grid ◽  
Trajectory Models ◽  
One Year

ABSTRACT In this paper, we demonstrate the use of a new operational, unstructured-grid hydrodynamic model within the oil spill trajectory model GNOME (the General NOAA Operational Modeling Environment) to examine the transport of surface oil from a known source approximately 10 miles offshore of the Mississippi River Delta. At this location, a cluster of wells and/or contaminated sediments have been persistently leaking small amounts of oil since they were damaged in 2004. Slicks associated with this source are frequently detected in satellite imagery analysis, which indicates they are often oriented in the along isobath direction with typical dimensions of 0.5–2 km by 10–30 km varying with wind conditions. The Northern Gulf of Mexico Operation Forecast System (NGOFS) has recently been deployed by NOAA and includes this region. The underlying hydrodynamic model is an unstructured grid finite-volume model which allows variable grid resolution ranging from 10 km offshore to ~600 m near the coastline. Unstructured grid models are ideally suited for coastal areas as they allow flexible resolution to resolve complex bathymetry and coastlines. However, large model domains combined with high grid resolution can provide a challenge for operational trajectory models as sub-setting the model grid is not as straightforward as in the structured grid case. The utility of any hydrodynamic model for emergency response depends not only on its accuracy, but on the trajectory modeler's ability to access and use the information in a timely manner. As part of this study, we have developed tools to allow the NGOFS results (in addition to other unstructured grid models) to be readily available to GNOME users. Using output from the NGOFS in GNOME, a one year modeled simulation was run in which surface particles were released continuously from the location of the damaged wells. Predicted trajectories of modeled particles less than ~24-hours in age compare qualitatively well with the satellite observations.

scholarly journals Incorporating terrain specific beaching within a lagrangian transport plastics model for Lake Erie

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Juliette Daily ◽  
Victor Onink ◽  
Cleo E. Jongedijk ◽  
Charlotte Laufkötter ◽  
Matthew J. Hoffman
Keyword(s):  
Great Lakes ◽  
Hydrodynamic Model ◽  
Turbulent Mixing ◽  
Lake Erie ◽  
Three Dimensional ◽  
Absolute Amount ◽  
Plastic Pollution ◽  
Surface Samples ◽  
Mixing Density ◽  
Bodies Of Water

AbstractMass estimates of plastic pollution in the Great Lakes based on surface samples differ by orders of magnitude from what is predicted by production and input rates. It has been theorized that a potential location of this missing plastic is on beaches and in nearshore water. We incorporate a terrain dependent beaching model to an existing hydrodynamic model for Lake Erie which includes three dimensional advection, turbulent mixing, density driven sinking, and deposition into the sediment. When examining parameter choices, in all simulations the majority of plastic in the lake is beached, potentially identifying a reservoir holding a large percentage of the lake’s plastic which in previous studies has not been taken into account. The absolute amount of beached plastic is dependent on the parameter choices. We also find beached plastic does not accumulate homogeneously through the lake, with eastern regions of the lake, especially those downstream of population centers, most likely to be impacted. This effort constitutes a step towards identifying sinks of missing plastic in large bodies of water.

Wave climatology of Lake Erie based on an unstructured-grid wave model

2016 ◽  
Vol 66 (10) ◽  
pp. 1271-1284 ◽  
Author(s):  
Qianru Niu ◽  
Meng Xia
Keyword(s):  
Lake Erie ◽  
Unstructured Grid ◽  
Wave Model

scholarly journals A 3D unstructured grid nearshore hydrodynamic model based on the vortex force formalism

2017 ◽  
Vol 116 ◽  
pp. 48-69 ◽  
Author(s):  
Peng Zheng ◽  
Ming Li ◽  
Dominic A. van der A ◽  
Joep van der Zanden ◽  
Judith Wolf ◽  
...  
Keyword(s):  
Hydrodynamic Model ◽  
Unstructured Grid ◽  
Model Based

Oxygen Depletion in the Central and Eastern Basins of Lake Erie, 1970

1976 ◽  
Vol 33 (3) ◽  
pp. 512-519 ◽  
Author(s):  
N. M. Burns
Keyword(s):  
Hydrodynamic Model ◽  
Lake Erie ◽  
Trophic State ◽  
Oxygen Depletion ◽  
Eastern Basin ◽  
Hypolimnetic Oxygen ◽  
Depletion Rate

The hypolimnetic oxygen depletion rate is required to be measured to an accuracy of approximately 3% if major changes in the trophic state of Lake Erie are to be documented within about 5 yr of the change commencing. Depletion rate measurements of this level of accuracy require a knowledge of the reoxygenation of the Central and Eastern basin hypolimnia and the transport of oxygen between the hypolimnia. A model is described here that enables an estimate of the degree of hypolimnetic reoxygenation to be made. The transport of oxygen between the hypolimnia was estimated by means of a hydrodynamic model. The resultant calculations gave areal hypolimnetic depletion rate values of 0.43 and 0.87 g O2 m−2 day−1 for the Central and Eastern basins, respectively, and volumetric depletion rates of 0.13 and 0.057 g O2 m−3 day−1, respectively, for these basins during 1970.

scholarly journals Interannual Variability of Cyanobacterial Blooms in Lake Erie

PLoS ONE ◽  
2012 ◽  
Vol 7 (8) ◽  
pp. e42444 ◽  
Author(s):  
Richard P. Stumpf ◽  
Timothy T. Wynne ◽  
David B. Baker ◽  
Gary L. Fahnenstiel
Keyword(s):  
Interannual Variability ◽  
Lake Erie ◽  
Cyanobacterial Blooms
Sign in / Sign up

Export Citation Format

Share Document