Water for water supply network of Kraków is withdrawn from the Rudawa river on the weir in Szczyglice. The withdrawn water is directed to two intake res-ervoirs, for pretreatment and storage to ensure water supply for the time of water quality decrease in the river. At the time of incorrect water quality in the reser-voirs (e.g.during eutrophication) water is withdrawn directly from the river. The water source is selected based on the water quality monitoring in order to provide best possible quality material to the waterworks. The paper presents the structure of water intake during the 8 year period. The percentage share of water with-drawn from the river and from the reservoirs in respect of the volume of treated water was analysed in each year. This percentage changes in time in favor of the intake reservoirs, from 32.0 in 2004 to 88.0% in 2010. The average share in the analyzed period of time reached the following values: intake directly from the river - 40.0%, reservoir I - 41.0%, reservoir II - 19.0%. Changes in the total per-centage of each source occur often, ranging from 100% use to complete resigna-tion from the source. Deteriorating water quality in summer (algae development, increase ...
In 1998 the water intake from the Rudawa river for water supply purposes of Krakow was secured by storage reservoirs with a total volume of 981 thousand m3. The reservoirs are designed to improve the quality of water supplied to the Water Treatment Plant (WTP). Water collected in the reservoirs acts as supply used when water quality in the river deteriorates. Simultaneously the water is purified in these reservoirs. The article presents the impact of the reservoirs on the change of water turbidity and colour during the first 11 years of the exploitation of the reservoirs (1999-2009). The analysis was based on the results of the research carried out in five sites of the technological line, from the intake through the storage reservoirs to the raw water well (Młynówka, inflow to the reservoirs, outflow from the reservoir 1, outflow from the reservoir 2, the well of raw water located in the area of the WTP). The reservoirs had beneficial effect on the reduction in water turbidity in the analysed multi-year period. In the raw water well the average water turbidity value was lower than the turbidity of water drawn from the Rudawa river (Młynówka) by 55,33% and the scope of ...
