Detection of Conveyance Changes in St. Clair River Using Historical Water-Level and Flow Data with Inverse One-Dimensional Hydrodynamic Modeling

摘要

The purpose of this report is to ascertain possible conveyance changes in St. Clair River between Fort Gratiot and Algonac, Michigan, from 1962 to 2007 by use of hydraulic information. Interpretations are based on (1) analysis of reach conveyance investigated by use of water-level measurements at eight gaging stations on St. Clair River, (2) analysis of reach conveyance described by inverse modeling of flows and water levels with a 1-D fixed-geometry hydrodynamic model, and (3) analysis of river conveyance investigated by flow simulations using water-level boundary conditions from 1962 to 2007 and annual parameterizations based on inverse modeling results.