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- W175886848 abstract "A computer program for simulating one-dimensional subcritical, gradually varied, unsteady flow in a stream has been developed and documented. Given upstream and downstream boundary conditions and channel geometry data, roughness coefficients, stage, and discharge can be calculated anywhere within the reach as a function of time.The program uses a linear implicit finite-difference technique that discritizes the partial differential equations. Then it arranges the coefficients of the continuity and momentum equations into a. pentadiagonal matrix for solution. Because it is a reasonable compromise between computational accuracy, speed and ease of use, the technique is one of the most commonly used.The upstream boundary condition is a depth hydrograph. However, options also allow the boundary condition to be discharge or water-surface elevation. The downstream boundary condition is a depth which may be constant, self-setting, or unsteady. The reach may be divided into uneven increments and the cross sections may be nonprismatic and may vary from one to the other. Tributary and lateral inflow may enter the reach.The digital model will simulate such common problems as (1) flood waves, (2) releases from dams, and (3) channels where storage is a consideration. It may also supply the needed flow information for mass-transport simulation." @default.
- W175886848 created "2016-06-24" @default.
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- W175886848 date "1978-01-01" @default.
- W175886848 modified "2023-09-26" @default.
- W175886848 title "Unsteady streamflow simulation using a linear implicit finite-difference model" @default.
- W175886848 doi "https://doi.org/10.3133/wri7859" @default.
- W175886848 hasPublicationYear "1978" @default.
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