Comparison of Numerical Analysis for Flood Flows in Open Channel Networks

Abstract

The matrix analysis of flood flows in open channel networks is introduced. Two methods, i. e., the characteristic method and the 4-point implicit method, are used to discretize the primary equations. Computed values by characteristic method are compared with ones of 4-point implicit method and together with observed values. Computed values by two methods are nearly agreed with observed values. It is confirmed that the solutions by characteristic method have a little instability under the condition of steep water profiles.