Two-Dimensional Relaxation Method Flow Model (RMFM) for Hydraulic Structures

摘要

A two-dimensional streamflow model called the Relaxation Method Flow Model (RMFM)was developed for use in the design of hydraulic structures in Arkansas. The report describes how to use the model to simulate water-surface elevations, velocities, direction of flow, and distribution of flow on the flood plain for peak flow conditions. The two-dimensional streamflow model, RMFM, is not as complex or as complicated to use as the U.S. Geological Survey's Finite Element Surface-Water Modeling System (FESWMS), but the water-surface elevations generated by both models for several test sites differed by only a few hundredths of a foot. Comparisons between RMFM and FESWMS were made by comparing the results of model runs using identical input data at three sites. Results were in good agreement and the computer time used to run RMFM was less than that used to run FESWMS.