A proposed streamflow-data program for Montana

An evaluation of the streamflow data available in Montana was made to provide guidelines for planning future programs. The basic steps in the evaluation procedures were (1) definition of the long-term goals of the streamflow data program, (2) examination and analysis of all available data to determine which goals have already been met, and (3) consideration of alternate programs and techniques to meet remaining goals. Only one of the goals was met by generalization of the data for gaged basins by regression analysis. The regression method may be more successful at a future time if a more suitable model can be developed, and if an adequate sample of streamflow records can be obtained. In the meantime, other methods of transferring flow characteristics which require some information at the ungaged site may be used. A streamflow data program based on the guidelines developed in this study is proposed.