Author(s): Youcai Tuo; Yun Deng; Jia Li; Kefeng Li; Nan Li
Linked Author(s): Yun DENG, Jia LI, Nan Li
Keywords: No Keywords
Abstract: A comprehensive prototype observation in the Fengman Reservoir was carried out to investigate the temporal and spatial variations of water temperature and ice conditions during the winter of 2012-13. The observed data show: 1) surface water temperature in the reservoir presents a longitudinal increase of 7.0ć in autumn, which results in the variation of freeze-up date along the reservoir; 2) a vertical inversion water temperature distribution existed beneath the ice cover, and the temperature drops in the front of the dam due to the heat discharge of power station during the ice season; 3) the outflow water temperature decreases at a steady rate of 0.16c/day before freeze-up in the reservoir, but maintains a 2.1ć temperature during the ice season, with a 60km open channel in the downstream part of the reservoir; 4) both freeze-up and break-up developed from upstream to downstream, and the ice thickness was non-uniform; 5) the temperature distribution in the ice cover is linear, and the estimated heat exchange beneath the ice cover is 8.5W/m2.
Year: 2014