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Identification of point sources of surface water pollution and their quantification in selected catchments in the Šumava Mountains.
TOMKOVÁ, Zdeňka
An evaluation of chemical parameters of surface waters proceed in the three small basin areas in Šumava Mountains, in the area of Svatý Tomáš highlands, during the year 2009: Bukový (woods), Mlýnský (semi{--}intensive and drained pasture, part of Pasečná village) and Horský stream (wetlands, woods, mowed meadows, a part of Svatý Tomáš village). The aim was to chart the three main periods during the year. The spring sampling (the 12th May) should illustrate the beginning of growing season with higher water flow rates. The summer sampling (the 21st July) is the period on the top of growing and touristic season, seasonal works in wood and especially in agriculture (grazing and mowing meadows). The last sampling (the 21st October) represents the season at the end of growing season, generally with the lowest flow rates in the stream, the end of touristic season and the end of full{--}area grazing. Already during the field research, involving the water sampling and conductivity measurement, there were some inflows with increased concentrations of dissolved solids found. Whereas in Bukový stream, as has been assumed, these inflows didn´t more or less occur, in Horský stream they had, relatively surprisingly but significantly, appeared immediately in headwater area. The elevated concentrations of dissolved solids occurred in Mlýnský stream in the whole area of basin, as has been assumed regarding to drainage and full{--}area grazing. One year monitoring proved the advantage of water quality evaluation using simple measurement of conductivity in field. High water conductivity in field was subsequently confirmed by laboratory analysis of selected ions. On the basis of identification of point sources of pollution, the recommendation improving present condition was suggested.
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Evaluation of water quality during year 2005 in stream Malše river.
TOMKOVÁ, Zdeňka
In this work is proved by evidence the course of changes in composition of water quality on the upstream of Malše river.The main purpose of this essay is also to work up device datas and value quality of water on the head water named Malše from years 2004/2005. These datas include elementary basic kations (Na, Mg, K, Ca), some heavy metals (Fe, Zn, Hg, As, Mn, Pb, Cr, Cd), main anions (Cl - , NO3 {--} - N, NO2 - - N, PO43- - P, SO42-, NH4+ - N) and datas benefit from terrain (pH, conductivity, temperature, oxygen of water and KNK4,5).
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