Users may select Equation (E = A*Tau^N ) and Bed Properties by Core ID for the erosion rates option in the General tab, if SEDFlume datasets provide the measurements of erosion rates (cm/s) as a function of applied shear stress (dynes/cm2) and the relationship between erosion rates and shear stress can be defined using Jones and Lick (2001)’s approach as:
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With the erosion rates option 2, the SEDZLJ algorithm in EFDC+ computes the erosion rates using Equation (1) based on user-defined three erosion rate parameters (A, n, and τcr) and a maximum erosion rate (Emax), which are obtained from the SEDFlume study. The maximum erosion rate is employed for each bed layer in order to prevent the prediction of unrealistically high erosion rates, which might occur due to the exponential formulation of Equation (1) when a high shear stress is applied.
Figure 1 Selection of Erosion Rates Option 2: Equation (E = A*Tau^N ) and Bed Properties by Core ID - General Tab.
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The sampling location of each SEDFlume core also needs to be entered in Easting (m) and Northing (m) Coordinates for utilizing the Core Assignment features of EFDC_Explorer.
Figure 3 Erosion Rates Option 2 - Core Definitions Tab.