This 1-D model assumes that energy is uniform in a cross section. 265) to determine changes in water-surface elevations from one cross section to the next by balancing total energy head at the sections. The HEC-RAS model uses the standard step method (Chow, 1959, p. HEC-RAS is a computer program that simulates 1-D, gradually varied, steady flow in open channels with fixed boundaries. The HEC-RAS computer model (Brunner, 2002a and 2002b and Warner and others, 2002) was used to construct a surface-water, hydraulic-flow model of the Kootenai River. ![]() ![]() GEOLOGICAL SURVEY Scientific Investigations Report 2006-5019 Simulations of Hydraulic Characteristics for an Upstream Extension of the White Sturgeon Spawning Habitat, Idahoīack to Table of Contents Model Development and Calibration Scientific Investigations Report 2006-5019
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