Full Equations Utilities (FEQUTL) Model for the Approximation of Hydraulic Characteristics of Open Channels and Control Structures During Unsteady Flow
Several look-up tables are used in FEQ to represent the variety of functions required in unsteady-flow analyses. These tables are called function tables and are the basis of the look up and interpolation procedures applied in unsteady-flow computations. Some of these tables are computed in the utility program, FEQUTL, and others are prepared manually from other sources. The table origin does not affect FEQ computations if the table conforms to the expected structure and format. The table types that are generated in FEQUTL are described in this section. Table type 10 is used for input to FEQUTL but is neither generated in FEQUTL nor utilized in FEQ. Table type 10 is described in this report for completeness. The other table types are described in FEQ section 11, the documentation report for the Full Equations model (Franz and Melching, 1997).
The three broad classes of function tables are called one dimensional, 1-D (having one argument), two dimensional, 2-D (having two arguments), and three dimensional, 3-D (having three arguments). Seven types of 1-D function tables, two types of 2-D function tables, and one type of 3-D function tables are computed in FEQUTL and are listed in table 1. The 1-D tables are the simplest and are presented first.