Full Equations (FEQ) Model for the Solution of the Full, Dynamic Equations of Motion for One-Dimensional Unsteady Flow in Open Channels and Through
Control Structures
Various files are used in FEQ simulation for input and output of data. Many of these files are formatted in an easily understood manner or as described in the Input Description for the Full EQuations Model (section 13). However, some of the input files are unformatted. The data in unformatted files are stored in the internal binary form that is directly accessible only by a computer. Thus, the file structure cannot be read and easily understood by the user. These files are used because computer processing is more efficient and storage space is less than that for formatted files. Thus, unformatted files are the best means for recording and retrieving large amounts of data in this application.
Two classes of unformatted data files are supported in FEQ. The diffuse time-series file (DTSF) is used to store the unit-area runoff intensities resulting from precipitation measured at one or more rain gages, each representing one or more land uses. These values represent the runoff from the area tributary to the branches in an unsteady-flow model. A single file is used to store all the values for a model. In contrast, more than one point time-series file (PTSF) may be used in an unsteady-flow model. These files, called point because they represent the flow or water-surface elevation at a point in the model of the stream system, record or provide the flow or water-surface elevation from or to an unsteady-flow model. They are used to connect submodels in a watershed and are called connection files.