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The Graphical User Interface (GUI) for the Sediment module in EE can be activated from the EFDC+ Modules, as shown in 2131361793.

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Figure 1  EFDC Modules Form - Sediment Transport Option.

EFDC+ supports two separate approaches for sediment transport computations: (1) Original EFDC Sediment Transport (Hamrick, 1996), and (2) Sediment Dynamics Algorithms developed by Ziegler, Lick, and Jones (SEDZLJ) (Ziegler et al., 2000; Jones and Lick, 2001; Grace et al., 2008; James et al., 2010).  Both approaches simulate the movements of sediments in the water column, changes in sediment bed properties, and sediment flux between the water column and sediment bed (i.e., erosion and/or deposition) based on flow fields computed by the hydrodynamic module.  Two distinct differences between the two approaches are in the ways they treat cohesive and non-cohesive sediments and the ways they compute erosion rates of the sediment bed.  First, the Original EFDC Sediment Transport option applies separate computation processes for cohesive and non-cohesive sediments, but the SEDZLJ option uses a unified treatment for multiple sediment classes with representative particle sizes (regardless of cohesiveness).  Second, the Original EFDC Sediment Transport option simulates the erosion process using a user-defined constant erosion rate parameter that is assigned to entire model grid cells, whereas the SEDZLJ option is capable of applying spatially varied erosion properties by employing site-specific erosion rate data acquired from SEDFlume sediment core tests.

Visualize Sediment

2DHView

2DH View

The sediment can be visualized and animated in 2DH View. These can be added to the 2DH View by clicking the Add button in the 2DH View’s Layer Control then select Primary Group: Sediment Bed  as shown in 2131361793Figure 1For the original sediment EFDC, the parameters include Bed Top Layer, Bed Thickness, Bed Density, Bed Porosity, Bed Mass, Bed Mass Fraction, Bed d50, Bed Delta, and Bed Topography.

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Figure 21. Original Sediment Bed Layer in 2DH View.

In the Layer Settings, it is able to select the display for all layers, top layer, or for a specific layer or depth as shown in 2131361793Figure 2.

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Figure 3. Layer Settings for Sediment Bed Layer in 2DH.

When the model contains multiple classes, EEMS supports to present presenting the parameter for each class in 2DH View by selecting the class settings as shown in 2131361793Figure 3.

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Figure 43. Class Settings for Sediment Bed Layer in 2DH.


In term terms of the sediment SEDZLJ model, the model output of SEDZLJ of the SEDZLJ Sediment Bed are is available to present in 2DH View. The parameters include SEDZLJ Core ID, SEDZLJ Skin Friction, SEDZLJ D50, SEDZLJ Erosion Rate, Net Deposition, SEDZLJ Bedload Chemical Fate and Transport, SEDZLJ Bedload Flux, SEDZLJ Bedload Vector, and SEDZLJ Bedload Mass.

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Figure 54. Sediment SEDZLJ Layer in 2DH View.


Time Series

The graphic of the sediment bed time bedtime series can be visualized by click the Time Series button or the icon Image Modified of the main toolbar. The Extract Time Series Data tab appears as shown in 2131361793Figure 5. It is possible to plot the time series for a single cell or multiple cells. Firstly, defying the cells to plots is in the box under Selected Cells. When the L index is has been entered the corresponding I and J indices are filled automatically. The parameter should be defined in the box, Primary Group: Sediment Bed and then the drop-down list of parameters is available. Add and remove the parameter can be adjust adjusted by the left and right arrow button. The user may define the start and stop day for the time series in Time Series Start/Stop frame (note that the start and stop days should be within the model's start and end date). Clicking OK plots the selected graphs as shown in Figure 6.

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Figure 65. Extract Time Series Data.

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Figure 76. Sediment Bed Thickness Time Series.

Longitudinal Profiles

The graphic of wave longitudinal profiles can be visualized by click the Longitudinal Profile button or the icon Image Modified of the main toolbar.  2131361793Figure 7 show the Data Extraction for Longitudinal Profile form. This form is similar to the Data Extraction for 2DV View form. Firstly, it is necessary to define the profile using the drape file or I, J indices and then defines define the parameter to the plot. The parameter should be defined in the box, Primary Group: Sediment Bed . Add and remove the parameter can be adjust adjusted by the left and right arrowarrows Once everything is ready, click OK to generate the plot. 2131361793Figure 8 shows a longitudinal profile for wave height and bottom elevation along with the profile I=81.

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Figure 87. Data Extraction for Longitudinal Profile.

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Figure 98. Longitudinal Profile.