An approach to streamflow forecasting

A water supply forecast scheme is presented for the Colorado River above Grand Canyon. A statistical study of 9 tributary streams resulted in a decision to treat each tributary by itself and then route them by correlation procedures for a collective forecast at Grand Canyon. The Green River above Linwood is used as the pilot study. Data from 10 precipitation stations were weighed by the Thiessen method. These data were used as a soil priming factor from the preceding fall months. Snow survey data from 9 courses were used for April 1 forecasts. Fall and winter temperatures through March were used as a temperature factor. Multiple regression formula are solve with the 4 variables, resulting in a multiple correlation coefficient of 0.918.