and 0.997 for data from the Platte River. Analysis of the state error covariance matrix for both rivers
indicates that some reduction in the number of parameters associated with the difference equation
formulated for mode 1 dynamics is possible.
The extended Kalman filter developed in this report provides a basis for projecting ice-affected
streamflow at other gaging stations by adjusting filter parameters to site-specific conditions. The
filter can project daily mean flow during periods of ice effects by use of real-time climatological and
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