Full Equations Utilities (FEQUTL) Model for the Approximation of Hydraulic Characteristics of Open Channels and Control Structures During Unsteady Flow
The input to FEQUTL consists of a block of lines, called the standard header, followed by one or more blocks of lines, called command blocks. A command block starts with a command and may be followed with additional lines of information required by the command. A command is a sequence of predefined alphanumeric characters read in FEQUTL defining which computations are to be done. The input blocks used to compute the hydraulic characteristics of open channels and control structures are listed in table 5.
Each of the input blocks listed in table 5 is described in detail in subsequent sections except the BRIDGE command. The BRIDGE command should not be used in new applications of FEQ and FEQUTL, and the Bureau of Public Roads (Bradley, 1970) procedure is not described here. The BRIDGE command is retained in FEQUTL for support of stream-system models developed previous to FEQUTL version 4.0. The commands WSPROX, WSPROQZ, and WSPROT14 should be used with the WSPRO software to represent bridges for any new applications of FEQ and FEQUTL.
Each command must begin in column 1 of a line. The first eight columns of the command line are reserved for the command, but the remainder of the line may contain a comment. The input associated with a command begins on the line following the command line. The lines of input are numbered from the first line of input and not the command line in the descriptions given in this section. The null command, consisting of all blanks in the first eight columns of a line, may be used to add comments and blank lines to the input. Comments entered with the null command cannot appear within the input for any command. These comment lines can only appear between the end of the input for a command and the subsequent command. Blank lines may be inserted anywhere in the FEQUTL input. Comments that can appear anywhere in the input are lines that begin with either a semicolon (;) or an asterisk (*). If the line begins with a semicolon, the line is not read in FEQUTL. However, if the line begins with an asterisk, the line is read and placed in the output file for FEQUTL.
Three standard files are used in FEQUTL operation. The first standard file is the input file containing the standard header block and the command blocks prepared by the user. The contents of this file are described in this section. The second standard file is called the output file. This file contains information read from the input file with annotations, error and warning messages to the user, and summaries of results from some of the commands. The third standard file, called the function table file, or just the table file, contains the function tables computed in FEQUTL in a format suitable for access in FEQ.