E l e c t r o n i c r e p r i n t
The measurements helped calculate the following geometric and hydraulic parameters of the supraglacial stream channel cross-sections :For each parameter exponential functions were determined of the water discharge down the long profile of the stream using regression equations calculated with the help of the least-squares method. These functions served to reveal dependences in the downstream hydraulic geometry of a supraglacial stream channel. Hydraulic geometry expresses the fit between water discharge as an independent variable and dependent variables (Leopold, Maddock 1953), i.e. the above parameters.
Weather conditions were studied at a meteorological station at Skottehytta lying at a distance of 4.4 km from the glacier front on a raised marine terrace (8 m a.s.l.) on the eastern shore of the Petuniabukta. The question of the location of a meteorological station with regard to the glacier is raised by Pulina et al. (1984), who draw attention to the similar magnitudes and patterns of major climatic elements recorded at stations situated in Hornsund and the Werenskioldbreen foreland. They emphasise, however, that there were slight differences between stations on the glacier foreland and on its surface. At Skottehytta, measurements were taken four times a day starting with 28 June 1985 (Kostrzewski et al. 1989). They included:The temperature was measured using an August psychrometer; wind direction was defined with the help of an eight-point wind-rose, and its speed with a Robinson anemometer at an altitude of 2 m; radiation was recorded using a Janiszewski pyranometer, also at an altitude of 2 m; and precipitation was collected in a Hellmann rain-gauge.