Author(s)

H. Saga & K. Hoshi

Abstract

This paper proposes the optimization technique to identify the parameters in Sugawara's Tank model that has been widely employed for long-term runoff analysis. Researchers have developed some mathematical optimization methods to identify unknown parameters, notably, the Newton method, the Powell method and the Davidon-Fletcher-Powell method. Computational burden is too stringent in application of the Powell method to parameter optimization in the Tank model, because a great number of runoff computations are required. In this paper, the unknown parameters are identified essentially by the Newton method. The efficiency of optimization performance resulting from use of the Newt

Keywords