Session K.pdf - Clarkson University

ones in 2002 by approximately 8 o C. However, the rise in temperature which typicallyhappens before the spring floods occurred earlier in 2003 than in 2002.Maximum flood discharge in spring 2002 did not exceed a 55 m 3 /sec. and in spring2003 it reached a 104 m 3 /sec.From January to April 2003, no overflow through Hydroplus Fusegates was observed.Water inside the Fusegates was frozen up from crest to bottom (Photo B, figure 6),while at the same time in 2002 a space with unfrozen water remained inside of theFusegates. Ice within the lower part of the well and at the bottom of the Fusegatesmelted after the floods started, overflowing Fusegate edge.Photo B. Hydroplus Fusegates during Frost of March 2003. (t = -20°C)Fig. 6. Ice Thickness beside Fusegate No. 3 in January and February 2003Ice level in all Fusegate wells differed little from the headwater level. This is due to thefreezing of the Fusegate bucket and drainage holes. However, during the winter of2003/2004, water and ice were not to be seen in any Fusegate buckets.According to the monitoring winter 2002/2003 discharge did not exceed 10 to 15 m 3 /sec.Ice thickness variation immediately in front of the installed Fusegates during winter is356