IALLUVIAL: A Computer-Based Flow- and Sediment-Routing Model for Alluvial Streams and Its Application to the Missouri River

摘要

The Iowa Alluvial River Model (IALLUVIAL) is developed for predicting changes in river bed elevation, flow depth and velocity, energy slope and bed-material composition in response to man-made structures or controls imposed on alluvial rivers. It is a one-dimensional, quasi-steady model that incorporates knowledge of the sediment-transport and friction-factor characteristics of flow in alluvial streams. IALLUVIAL uses a friction-factor relationship which includes sediment discharge as one of the independent variables and routes the flow and sediment in two phases. IALLUVIAL is applied to the 200-mile reach of the Missouri River downstream of the Gavins Point Dam.