The paper contains preliminary results of investigations on transformations of organic and biogenic compounds in small water reservoir. The reservoir Górny Młyn near Końskie (Świętokrzyskie District) located on the Czysta river was chosen as an object of investigations. The bases of analysis were hydrological and chemical investigations covering measurements of water volume inflowing and flowing from the reservoir as well as determination of its chemical composition. The investigations which covered six measurements series were carried out between May and July in the year 2006. The following indicators of pollution were determined in laboratory by means of reference methods in taken samples of water: BOD2, P-PO4, N-NH4, N-NO2 and N-NO3. Hydrometric measurements showed that the main source of alimentation of investigated reservoir is the reservoir Szawelnia located above, from which inflow to the Górny Młyn reservoir fluctuated between 0,003 do 0,120 m3⋅s-1. Taking into account small stream „without name”, the total amount of water inflowing to the reservoit during investigations was on an average 0, 055 m3⋅s-1, while the amount of flowing from the reservoir was on an average 0,051 m3⋅s-1. The crucial influence on quality of water inflowing and flowing from the decanter had concentration of nitrite nitrogen, which several ...
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 research work contains estimation of the low-retention reservoirs, Jasionówka and Czapielówka, pollution level. Both reservoirs are located within the region of Green Lungs of Poland in the Podlaskie region. The Czapielówka impounding reservoir, in the examined period of time, had higher level of phosphates abundance, in comparison to Jasionówka reservoir. Concentration of all inorganic forms of nitrogen in the surface layer, in both water regions meets standards of first quality class. In the aspect of iron and manganese we can classify both reservoirs to the second class. Considering the concentration of organic compound (presented as CODMn) in both reservoirs met the norms characteristic for third class. Considering CODCr, Jasionówka low-retention reservoir met standards characteristic for fourth class, and Czapielówka- for fifth class of surface water quality. Color indicators in both analyses water regions were characteristic for fourth/ fifth class. The analysis of investigated factors showed, that Jasionówka Water Reservoir characterized lower level of trophic state than Czapielówka Reservoir. ...
This article is concerned with surface water quality with regard to the identification of its main factors influence on water quality state on the basis of two selected low-retention reservoirs in the Podlaskie. The aim of the work was to evaluate the pollution level in the reservoirs in Korycin and in Wasilków, and also to determine the seasonal changes in the contents of the selected physio-chemical indicators in characteristic measurement and control points of the reservoirs, from April 2007 to March 2008. There are many factors which affect the quality of the water in the reservoirs, for instance the natural processes of self-purification which occur with the participation of plant and animal organisms. The progress of the process being in the reservoirs as well as water outflowing quality depends on the water contamination degree that supply the reservoirs. The highest concentration of the analysed parameters were obtained in the reservoir in Wasilków. The water in Korycin had better quality. Most of the analysed physic- chemical indicators of water in both reservoirs were equivalent to I/III quality class, but colour, phosphates and COD-Cr were the disqualifying parameters of water quality. The reservoir in Korycin indicates a self-purifying capacity, whereas it was ...
The aim of the paper was to determine the possibility of the use of Shewhart control charts to monitor changes in the forms of nitrogen, showing the quality of wastewater discharged from the wastewater treatment plant in Krosno in the years 2010-2015. The performed statistical analysis showed the highest number of cases of elevated nitrate nitrogen and/or ammonium nitrogen when the temperature of treated wastewater was below 8-9°C. This low temperature resulted in adverse effect on the activity of bacteria that were involved in biological removal of nitrogen. It was found that in the winter months, the second stage of nitrifying bacteria responsible for oxidation of nitrite to nitrate, exhibited higher activity than the denitrifying bacteria. Graphical presentation of total nitrogen content using control charts for the mean of the process revealed the exceedance of the upper specification line (USL = 10 mgNtot·dm-3) in the months from December to April. It was observed that the total nitrogen removal process in the months from June to November was stable with a very high 90% reduction in biogenic activity. The obtained results confirm the efficacy of control charts as a tool which can easily be applied in the statistical process control of ...
