TR-96 : Comparison of some routing techniques

Abstract

Simplified routing techniques are still considered to be important tools of flood routing because of their simplicity in application and lesser data required for their solution. In order to judge the performance and capabilities of different techniques, it is necessary to carry out studies with common data base. This study attempts to compare the relative performance of five routing techniques namely Conventional Muskingum method, Three-Parameter Muskingum Method, Muskingum-Cunge Method, Variable-Parameter Diffusion method and Kalinin Milyukov method using the flood data of river Tapti between Hathnur and Bhusaval. It is seen that the Three-Parameter Muskingum type procedure is performing best of all.. The Conventional Muskigum method and Kalinin-Milyukov-Method rank second and third in performance. The Muskingum-Cunge Method and Variable-Parameter Diffusion method did not perform as good as others. It is suggested to use Three-Parameter Muskingum Method, in the field as it has also got the advantage of incorporation of lateral inflow. A sensitivity analysis for all the methods, has also been made to see the effect of the change in parameters on the results. From the analysis, it is seen that the error in inflow is directly reflected in the results hence the inflow data should be collected very accurately. Other parameters, K and in Conventional Muskingum Method and Three-Parameter Muskingum method, rating curves in Kalinin-Milyukov Method and.0 and a in Variable Parameter Diffusion Method, need to be estimated with proper care and Judgement