Topographic Information File

Fundamental to any model is an understanding of the topography/bathymetry of the region. If bathymetry is to be applied at this phase, a file must be selected that contains topographic data over the region to be modeled. The formats of this type of file are provided in Appendix. Once selected, EFDC_Explorer loads the file and displays the corner coordinates in the Upper Right and Lower Left frames. The units displayed are assumed to be in meters with direct correspondence to the coordinates to be used for the LXLY file. An example digital topographic data file using colors to represent the elevation range is displayed in Figure 1.

The user should note that this file is not necessary to generate a new model. EFDC_Explorer provides the user the ability to reapply revised or new topographic information to an existing model using the Assign button on the Domain tab, Initial Conditions and Bottom Roughness Tab in the Bathymetry frame.

Figure 1  Example digital topographic data.