Full Equations Utilities (FEQUTL) Model for the Approximation of HydraulicCharacteristics of Open Channels and Control Structures during Unsteady Flow

摘要

The purpose of this report is to document the procedures applied in the FullEQuations UTiLities (FEQUTL) model to compute function tables that relate flow to upstream and downstream flow depth for cross sections and hydraulic control structures in open-channel systems (streams) simulted with the Full Equations (FEQ) model. This report describes the procedures applied in FEQUTL to compute the hydraulic characteristics of channel cross sections, expansions, contractions, bridges, culverts, embankments, weirs, closed conduits (circular, rectangular, and pipe-arch shapes), dam failures, floodways, and underflow gates (sluice and tainter gates). The report begins with a description of the variety of function tables required to list the hydraulic characteristics of the stream features listed to facilitate simulation of unsteady flow with FEQ. The procedures applied to approximate the hydraulic characteristics of open channels (cross sections, expansions, and contractions) are discussed. The procedures applied to approximate the hydraulic characteristics of hydraulic control structures are developed.