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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Impact of road traffic on chemical status of the Chvalka creek
 Nagy, Miroslav ; Komínková, Dana (advisor) ; Jana, Jana (referee)
The aim is to assess the chemical status of a water course Chvalka in Prague before/after rain events and the effect of discharge from the Pražský okruh (Východní spojka) using laboratory analysis of water and sediment. From the results we can say that the creek Chvalka is heavily polluted by human activities before mouthing of discharge from Eastern clutch. These runoffs (except Cl) have on the physico-chemical indicators of water quality of the creek little or no influence. In contrast to the heavy metals (Cu, Pb, Cr and Zn), the highest concentrations were measured just at the locations affected by runoffs from Východní spojka. Sampling and laboratory analysis of sediments were for small changes in concentration overtime and time demands made only once. Because of little data to comparison can pronounce that runoff from Východní spojka have an impact on increased concentrations of Zn and maybe even Ni.
Detailed record
The evaluation of woody plantings carried out in revitalization small streams
 KELLEROVÁ, Petra
The aim of this thesis is to evaluate the success of woody plantings carried out in order to revitalize small streams. For selected restorations was assessed dendrological composition, establishment, health and care after planting. The most common species planted in the revitalization of small streams is the alder (Alnus glutinosa), a pioneer tree species reinforcing shores, to which it was coupled with flowing water home. Sometimes forming groups with gray alder (Alnus incana) but that does not fit stagnant water and silver birch (Betula pendula). Also mountain elm (Ulmus glabra) and willow species (Salix sp.) are widely planted along streams. Locally, there were planted common ash (Fraxinus excelsior) but mostly in very poor condition, and oak (Quercus robur), sporadically rowan (Sorbus aucuparia), dogwood (Swida sanquinea) and Norway maple (Acer platanoides). A statistical evaluation shows that the biggest influence on species composition and state of health of trees has the revitalization age. Also important is the care of the vegetation in later years after planting.
Detailed record

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