Verification of a One-Dimensional, Unsteady-Flow Model for the Fox River inIllinois

摘要

A one-dimensional, unsteady-flow model utilizing the Full de Saint-VenantEQuations (FEQ) for one-dimensional, unsteady flow in open channels was verified for a 30.6-mile reach of the Fox River in northeastern Illinois. The model was used to simulate a period of unsteady, within-bank flow induced by dam operations at the upstream end of the river reach, Stratton Dam near McHenry, Illinois, during November 1990. The river stages and streamflows simulated by the model, together with dye-injection rate and concentration data measured at Stratton Dam, were used as input for a transport model, the Branched Lagrangian Transport Model. The simulation results from both models were compared graphically with stage, streamflow, and (or) dye-concentration data collected during the unsteady-flow period at a total of 31 downstream sites. The effects of the physical and computational model parameters also were examined.