The previously developed influence coefficient algorithm for the solution of the parameter identification problem is extended to multiple reach channel flows, and the stage hydrograph and velocity data and observation station location requirements for an effective determination of the parameters are discussed. The specific application chosen here involves the identification of the individual reach friction parameters, which are not physically measurable and which have to be determined from the mathematical model by the use of concurrent input and output measurements. The influence coefficient algorithm is incorporated with numerical solutions of the unsteady equations of flow through explicit finite difference formulations of these equations. The explicit formulations simplify the computer program but necessitate special precautions to avoid computational instabilities. The stability criteria, which must be observed, are indicated.
Water Resources Research – Wiley
Published: Apr 1, 1973
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