12
ERDC/CRREL TR-02-14
resulting from the PA schedule. If the PA implies reduced winter flow rates, river
ice may form faster and thicker, as flows would be shallower and convey less
heat. On the other hand, ice covers would form at lower stage elevations in the
river channel, exposing more of the banks to freezethaw. This conjecture needs
further consideration, possibly by means of numerical or physical modeling.
40,000
35,000
30,000
25,000
20,000
15,000
10,000
5,000
0
a. Water years 1970 through 1993.
18,000
16,000
14,000
12,000
10,000
8,000
6,000
4,000
2,000
0
b. Water years 1994 through 1996.
Figure 7. Mean daily flow rates indicated by the USGS gage at Fort Peck.
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