The Dobczyce Reservoir is especially important because it is a source of potable water for the inhabitants of Krakow. The source of the reservoir feeding is the Raba river, whose catchment still lacks properly managed sewage disposal, therefore the water inflowing to the reservoir contains pollutants which decide about the insufficient water quality in the reservoir and to a considerable degree also determine the processes occurring in it, including eutrophication and overgrowing. In the work analysed was the loading of the Dobczyce Reservoir with biogenic compound load carried by the waters of the Raba river. The analysis based on tests of the Raba water quality and the flow volume on the inflow to the reservoir in the Osieczany cross section. The tests covered the period from May 2003 until October 2005. Investigations of biogenic compounds concentrations were conducted with average frequency twice a month. Concentrations of NH4, NO2, NO3,PO4 and total P were determined. The loads of individual biogens were computed for days, months and years of the analysed period. The obtained results point to a considerable diversification of mean daily values of loads in the analysed years. They were the highest in 2005 for NO3, NO2 and total P, ...
Based upon investigations the concentrations of nitrogen and phosphorus compounds in tributaries of the Dobczyce reservoir were determined. The investigations were carried out in the period between July and December 2003 and during the hydrological years 2005. The Dobczyce reservoir which is the source of water for Cracow has maximum volume of 125 mln m3. The Raba river is the main tributary of the reservoir. The reservoir is also supplied by own basin of area 78,2 km2 with several small streams having total area 64,4 km2. Apart from the Raba river streams of direct basin are suppliers of biogenic compounds to the reservoir. The work was based upon analysis of concentrations of NH4, NO3, NO2 i PO4 in samples of water taken from the following streams at their inflow to the reservoir bowl: Brzezówka, Ratanica, Trzemeśnianka, Dębnik and Wolnica. The samples were taken once a month. Obtained results point that the concentrations of biogenic compounds in water of direct tributaries did not determine serious threat for quality of water of the Dobczyce reservoir in the second half of 2003. The similar state was noticed in the hydrological year 2005. Waters of investigated streams in analyzed period were moderately abundant in ...
The study presents the results of the research under contain a nitrogen and a phosphorus in the Dobczyce reservoir's inflows (in a period July-December 2003 year). There was a drought time, which characterized a low precipitations. The research has done on a shot in a five direct inflows of reservoir: Ratanica, Brzezówka, Dębnik, Wolnica i Trzemeśnianka and in the Raba river (Osieczany section). Obteinable results of the research with six measuring sections were compared and on this basis, water was qualified to an appropriate grade. The direct inflows of the Dobczyce reservoir, which was investigated on a contain a nitrogen and a phosphorus, wasn't serious endangered in a half a 2003 year. The inflows was moderate prosperous in a nitrogen compounds and affluent in a phosphorus compounds. The water of streams investigated rest on value of concentration nitrogen in a form: amonium nitrogen, nitrate nitrogen and nitrite nitrogen according to a decree of 1991 can qualify for a first class purity. According to a proposal decree can qualify for a first class with exception of the Ratanica stream and the Trzemeśnianka stream, concering to nitrite nitrogen. There is a worse qualify of water in the Raba river, becouse of amonium ...
