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The Dobczyce Reservoir is one of the new man-made lakes located at the Raba River in the Carpath-ian Mountains. The drainage basin is underlain by flysch with a high proportion of sandstone. The river is characterized by great variability of runoff. The mean annual discharge is about 12 m3·s-1. The dam began to function in 1986 and about 2.1 m3·s-1 of fresh water has been withdrawn from the reservoir...
The biomass, production, respiration of algae and heterotrophic bacteria were determined in the surface layer (0.5 cm) of bottom sediments in the river above and below the reservoir, and in the backwater and littoral zone of the reservoir during the vegetation periods (April-October) in 1993 and 1994. The amounts of energy flowing (assumed as the sum of biomass, production, and respiration) through...
An algal growth test was used to show the trophic state of the water of the Dobczyce Reservoir and its direct tributaries. The Dobczyce Reservoir showed a lower trophic level than its affluents. So far, the reservoir has been mesotrophic, but shows a tendency to increase from year to year. The trophic level of its water was less than that of the Goczałkowice Reservoir, which was eutrophic.
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