2.6 Ice Cover
Ice cover was monitored using a time-lapse camera (Reconyx, Holmen, WI, USA) that took hourly photos of the southern edge of the reservoir. Water temperatures were also used to identify the solar radiation penetration into the water column and as such, ice formation, as ice and snow cover reduce or prevent radiation from entering the water column.
Figure 5 illustrates the key phases of the reservoir regime. The ice-free period (Fig. 5a) and the ice-cover period (Fig. 5c) are separated by the onset (Fig. 5b) and break-up (Fig. 5d) of ice.