...
...
...
...
...
...
...
...
The following provides the keys steps to carry out when building a sediment bed model using either the original EFDC sediment sub-model, or the SEDZLJ sediment sub-model.
- Click the Modules tab and item in the menu in the Model Control form and check on one of boxes (Original) Cohesive Sediments, (Original) Non-Cohesive Sediments, or SEDZLJ Sediments then click the OK button. (see Figure 1).
- After that The Sediment tab option will be added to to Modules Tab. RMC on the Sediment Tab then item and select Settings. The Sediment and Sediment Bed Properties Settings appearsSettings form is displayed as shown in Figure 2.
- Define the number of sediment bed layers, cohesive and non-cohesive sediments as shown in Major Settings of EFDC Sediment Model (it is important do this first to avoid losing data).
- Set the options in the General tab for the Primary Computational Options and the Bed Shear Calculation Options.
- In Cohesive the Cohesives tab the user should enter the appropriate values for the relative parameters as well as defining the minimum and maximum values of Cohesive Fluids Concentration as shown in Figure 2.
- In the Non-Cohesive Suspended tab the user should define the Equilibrium Concentration Option and enter the appropriate values for the relative parameters and non-cohesive layers.
- In the Non-cohesive Bed tab the user should click on Initialize Constants button and enter the number for the approaches approach desired e.g. enter "1" for the Van Rijn approach.
- In the Morphology & Consolidation tab the user should select the Bed Morphology Options: 0-No Bed Change, 1-Allow Bed Changescheck-box, off is no bed change, on is allow bed changes. The user should also set the Max Layer Thickness and Constant Porosity to be the same values as those in the input sediment file (refer to Appendix B - Data Formats for the DSM format of the file).
- In the Initial Conditions tab: select the Sediment Initial Condition Options. Then click Assign Bed IC button, there are 2 options to initialize bed layers: Uniform uniform bed and use initial data file.
- Initialize the sediment bed from file, browse for the input sediment file
- Check Use sediment cores with grain size
- Define the maximum grain size for each size class relatively to cohesive and non-cohesive layers as displayed in the in the red frame in Figure 3.
If the required information has been entered then the Apply button is visible. After clicking on Apply, the sediment bed will be initialized.
Anchor Figure 1 Figure 1
Figure 1 1. Activate sediment modules.
Anchor Figure 2 Figure 2
Figure 2 2. Sediment Bed Model: Cohesives Tab.
Anchor Figure 3 Figure 3
Figure 3 3. Initialization of Sediment Beds.
...