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Fishpond sediment – new approach to the nutrient recycling in the agricultural landscape
Potužák, Jan ; Duras, J. ; Kröpfelová, L. ; Šulcová, J. ; Chmelová, I. ; Benedová, Z. ; Svoboda, T. ; Novotný, O.
Possibilities of the use of the fishpond sediment in the improvement of arable land is discussed. Among others, this approach has a high potential to contribute to the recycling of phosphorus in the agriculture landscapes. For this purpose, we propose set of particular techniques which were tested in the field study.
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Revitalization study for small water reservoir
POSLUŠNÝ, Marek
This Diploma Thesis deals with small water reservoirs as significant landscape elements, that have the essential influence on preservation or increase of generic diversity of the whole territory. In a specific example of the proposal of restoration of a small water reservoirs the pond Panský in the cadastral area of Lhota by Kamenice nad Lipou is presented the suitable way of approach to original, natural functions of this minor dam considering the interest of the owner, who uses the pond for semiintense fish farming.
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The content of mercury in sediments washed out from the Jordán reservoir
JAHODOVÁ, Jana
The aim of this study was to examine if the sediments were washed out from the Jordán reservoir due to the rupture of the temporary dam to the Tismenický brook and then to the Lužnice river. The aim of the work was to assess the degree of their contamination with mercury and the possible environmental risk as well. The detailed literature research focused on determination of mercury in sediments was conducted at first. Then, the characteristics of the analytical method serving for mercury determination using an AMA 254 spectrometer were calculated. After that, the contents of mercury in individual samples of sediments were determinedand the degree of the environmental contamination was evaluated. Analytical andecological aspects of this study were taken into account. The measurements were related to samples taken from eight sampling sites during the six months from November 2013 to June 2014. The sediments were taken from four depths. Localities upstream the reservoir contained very low content of mercury. Its concentration corresponded to the natural background observed in sediments (the natural occurrence of Hg in the environment). The higher concentrations of Hg were determined in samples taken from sampling sites downstream the reservoir. However,these values corresponded to the natural occurrence of this element as well. The increased mercury concentrations (1.0365 mg/kg ? 0.0398) were obtained for samples taken from the site lying close ahead of the confluence of the Tismenický brook and the Lužnice river. This value exceeded the legislative limit (regulation No. 13/1994 Sb. The higher concentrations of mercury were determined for samples taken from the Lužnice river downstream the confluence compared to samples taken upstream the confluence. It is due to the rupture of the temporary dam (in December 2012 and June 2013) that resulted in washing out the sediments from the Jordán reservoir. This ecological disaster led to the change in natural mercury occurrence in localities downstream the reservoir.
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Effect of intensive cage fish farming on water quality in the Nechranice reservoir
Hejzlar, Josef ; Borovec, Jakub
Effect of cage fish farming on water quality in the eutrophic Nechranice reservoir was assessed through its contribution to the balance of eutrophication-effective forms of phosphorus (PO4-P) entering the reservoir and through measuring impacts on sediment around farming cages. The study showed that although the contribution of cage fish farming is relatively small (max. in tenths to a few percents of the total PO4-P load), its effect on water quality can not be neglected, because it causes direct pollution and, under certain hydrologic and climatic situations, contributes significantly to the eutrophication and to critical deterioration of water quality for recreation and bathing. On the other hand, it is indisputable that the main source of eutrophication of the Nechranice reservoir are discharges of municipal wastewater in the catchment.
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Revitalization of ponds and biodiversity conservation - Jordán pond case study.
ŘEŽÁBEK, Pavel
The work is conceived as a literature review. Attention is devoted to a summary of basic knowledge revitalization tanks in general, focusing on removing sediment and draining the tank. The main objective is to describe the current state of the revitalization of Jordan Reservoir and problems caused by technical procedures. It also describes the biodiversity of the major groups of organisms (fish, selected groups of invertebrates and higher plants), particularly in terms of protected species under the Act. Time describes the first three years of restoration, which is currently before completion (half year to end work).
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The influence of a control measure GAEC 2 on the sediment denuding reduction in chosen basins
HUMPÁL, David
This diploma thesis deals with the issue of sediments (undissolved substances) and with the possibilities of reducing sediment denudation in an agricultural landscape, especially my means of GAEC 2. The principal object of the thesis is to assess the effect of GAEC 2 on sediment denudation and to propose complementary erosion control measures in a landscape of interest. The research basin of the Jenínský Brook with permanent graminaceous vegetation on its soil blocks (without GAEC 2 application) and the basin of the Budský Brook in the soil blocks of which the GEAC 2 standard is applied were chosen for this thesis. The data series of concentrations of undissolved substances and flow-rates were processed to obtain the required data. The data series were gathered from themonitoring of collection cross-sections J1, J2 (Jenínský Brook micro - basin) and collection cross-section B1 (Budský Brook micro - basin) in the hydrological years 2011 and 2012. The results obtained were compared and the causes of the resulting values including the GAEC 2 effect were established. Appropriate measures to be taken to reduce sediment denudation were proposed based on the detailed research of the basins in question.
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Možnosti a způsoby využití kalů a sedimentů z ČOV
ENVISAN-GEM a.s., Praha ; AGRO-EKO, Ostrava ; Výzkumný ústav vodohospodářský T.G. Masaryka, Praha ; Petrášková, L ; Vosáhlová, Simona ; Kyclt, Robin ; Holuša, Václav ; Pospíšilová, Eva ; Sýkora, Karel ; Sedláček, Miroslav ; Michalová, Marie
Současný stav v přípravě a diskusi o výhledovém nakládání s kaly a bioodpady v EU. Současný stav nakládání s čistírenskými kaly v ČR. Údaje o produkci a nakládání s kaly, produkce ostatních odpadů z ČOV v ČR. Charakteristika technického stavu kalového hospodářství v ČR. Prognóza vývoje následného využití/odstranění kalu z ČOV. Odhad investičních nákladů na kalové hospodářství s vazbou na nakládání s kalem podle zákona o odpadech. Nové trendy v nakládání s kaly. Dosahovaná kvalita kalů ve vztahu k limitům rizikových látek a platné legislativy.
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Možnosti a způsoby využití kalů a sedimentů z ČOV: Zpracování a využití kalů z čistíren odpadních vod v Polsku
ENVISAN-GEM a.s., Praha ; Geuss, Erik ; Kyclt, Robin
Svazek obsahuje dvě studie Studie ENVISAN-GEM Zpracování a využití kalů z čistíren odpadních vod v Polsku obsahuje rozbor legislativy a popis technologií pro využití či zneškodnění kalů. Studie ing. Geusse Orientační ekonomické posouzení procesu využívání a odstraňování čistírenských kalů z hlediska potřeb implementace rámcové směrnice EU o odpadech v ČR pro současný stav a výhled k roku 2012 obsahuje: Metodika orientačního ekonomického posouzení; Analýza dosavadních hodnocení; Výběrové šetření nákladů procesu využívání a odstraňování čistírenských kalů z ČOV (spalování, zpracování stabilizovaného kalu a jeho uložení do zemědělské půdy, skládkování a odhad celkových ročních nákladů na zpracování kalu)í metody; Komentář k výsledkům ekonomického posouzení.
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