This diploma thesis is concerned to determination of countercurrent proces of water surface level decrease before the thin-plate rectengular-notch weir. The measuring of the depth of water is to determine properly the flow standard. For this reason is the experimental measurements the main topic of this thesis. The aim was to do some measuring on free thin-plate- rectangular with weir b=250 mm, b=200 mm and b=150 mm. The values were evaluated and attain results were compared with the results which were reported in the literature.

The thesis attends to cargo inland waterway transport on the river Elbe in the Czech republic. The target is to analyse its progress, function and place in national and international transport. The thesis shows actual problems that occur in inland waterway transport. The main problem is the bottleneck at the Czech - German border which should be solved by building-up of the weir in Děčín. But this is not acceptable for environmentalists. The target as well is to quote reasons why to built-up the weir which is important for the development of inland waterway transport.

Conselho Nacional de Desenvolvimento Científico e Tecnológico / The technological development and population growth have led man to increasingly exploit the natural resources of Earth Planet to meet their own needs, which has caused a major concern as the environment, since this operation has not been done so rational, but a predatory way. With population growth, it´s necessary to increase food production, but the area of cropland in the world does not grow as fast as population. Thus, increase of food production becomes possible with intensification of agriculture in the areas available, through the use of inputs such as fertilizers, agrochemicals, fossil energy and irrigation techniques. Currently, one of the most serious problems affecting the environment from chemical pollution is organic or inorganic in nature, resulting from residential and industrial discharges. All forms of life are affected by the presence of heavy metals, ones more and ones less, depending on the dose and chemical form. Thus, the major concern with these elements is related to its bioaccumulation by aquatic flora and fauna that ultimately reach the man, producing lethal and sublethal effects arising from metabolic disorders. The knowledge about the interactions between plants and heavy metals is very important, not only the safety of the environment, but also to reduce the risks associated with the introduction of these elements in the food chain. This study determined the concentration of metals in cultivars produced in irrigated areas Jacarecica I and Macela Dam in Itabaiana-SE. The quantification of metals Zn, Cu, Ni, Cr, Pb, Mn, Fe, Na, K, Mg and Ca was made by Atomic Absorption Spectrometry. The results of the analyzes in vegetables were expressed as a function of wet mass. Of the metals analyzed, compared with the levels established by the Agency for Sanitary Surveillance (ANVISA), all samples of vegetables analyzed had levels below the limit of tolerance. The results for the soil samples collected in each irrigated vegetable plots were compared with the "Guiding Values for Soils and Groundwater in the State of Sao Paulo" the BOARD DECISION No. 195-2005 - E (CETESB, 2005), and all soil samples analyzed had levels below these values. The data set obtained with the mean concentrations of vegetables and soil samples was subjected to exploratory data techniques, principal component analysis (PCA) and hierarchical cluster analysis (HCA) promoting the separation of vegetables according to their type , showing that there is a predominance in metal concentrations in vegetables of roots, while the soil was separated according with the perimeter and the elements in macro and micronutrientes. The computational program Statistica 6.0 was used for processing the data and generation of graphics . The accuracy and precision of the analytical method for samples of vegetables and soils were determined by analyzing, in triplicate, the certified reference material Peach leaf (NIST 1547) and sediment (NCS DC 75304), respectively. The results showed that at the present time, there is no contamination in irrigated areas, for the studied metals. / O desenvolvimento tecnológico e o crescimento populacional têm levado o homem a explorar cada vez mais os recursos naturais do planeta Terra para satisfação de suas necessidades, o que vem causando uma maior preocupação com o meio ambiente, visto que, essa exploração não tem sido feita de forma racional, mas de maneira predatória. Com o crescimento populacional, é necessário incrementar a produção de alimentos, porém a área de terras cultiváveis no mundo não cresce na mesma velocidade que a população. Dessa forma, aumentar da produção de alimentos torna-se possível com intensificação da agricultura nas áreas disponíveis, através da utilização de insumos como fertilizantes, agroquímicos, energia fóssil e técnicas de irrigação. Atualmente, um dos problemas mais sérios que afetam o meio ambiente é a poluição química de natureza orgânica ou inorgânica, decorrente dos despejos residenciais e industriais. Todas as formas de vida são afetadas pela presença de metais pesados, umas mais e outras menos, dependendo da dose e da forma química. Assim sendo, a maior preocupação com estes elementos está relacionada à sua bioacumulação pela flora e fauna aquáticas que acaba por atingir o homem, produzindo efeitos subletais e letais, decorrentes de disfunções metabólicas. O conhecimento sobre as interações entre as plantas e os metais pesados é muito importante, não só à segurança do meio ambiente, mas também para reduzir os riscos associados com a introdução desses elementos na cadeia alimentar. Este trabalho determinou a concentração de metais em cultivares produzidos nos perímetros irrigados Jacarecica I e Açude Macela, localizados na cidade de Itabaiana-SE. A quantificação dos metais Zn, Cu, Ni, Cr, Pb, Mn, Fe, Na, K, Mg e Ca foi feita por Espectrometria de Absorção Atômica. Os resultados das análises realizadas em hortaliças foram expressos em função da massa úmida. Dos metais analisados, em comparação com os níveis estabelecidos pela Agência de Vigilância Sanitária (ANVISA), todas as amostras de hortaliças analisadas apresentaram níveis abaixo do limite máximo de tolerância. Os resultados referentes às amostras de solo coletadas nas hortas em cada perímetro irrigado foram comparados com os Valores Orientadores para Solos e Águas Subterrâneas no Estado de São Paulo da DECISÃO DE DIRETORIA Nº 195-2005- E (CETESB, 2005), sendo que todas as amostras de solo analisadas apresentaram níveis abaixo desses valores. O conjunto de dados obtidos com as médias das concentrações das amostras de hortaliças e solos foi submetido a técnicas exploratórias de dados, análise de componentes principais (PCA) e análise de agrupamento hierárquico (HCA), promovendo a separação das hortaliças de acordo com o seu tipo, mostrando que há uma predominância na concentração de metais nas hortaliças de raízes, enquanto que o solo foi separado de acordo com o perímetro e os elementos em macro e micronutrientes. O programa computacional Statistica 6.0 foi utilizado para o processamento dos dados e geração dos gráficos. A exatidão e a precisão do método analítico para as amostras de hortaliças e solos foram determinadas pela análise, em triplicatas, do material de referência certificado de folha de pêssego (NIST 1547) e sedimento (NCS DC 75304), respectivamente. Os resultados obtidos mostraram que até o presente momento, não há contaminação nos perímetros irrigados, para os metais estudados.

The diploma thesis deals with analysis of flow ratios at the hydraulic plant Klecany – Roztoky, located in the region of Střední Čechy at Vltava river (km 37,08). At this site 3D streaming of superficial water was simulated aiming to evaluate the influence of potencial construction of the new hydroelectric power plant Klecany II on existing Klecany I. Using all of the base documentation available, 3D models of current and planned conditions were created to serve as base for calculation in FLOW 3D. The first part of the thesis describes, how the planned construction of the new hydroelectric power plant Klecany II could influence the current fairway at the inlet 400 m3/s. The second part analyses shape of planned flow hydroelectric power plant Klecany II for flow Q90d, equal to 180 m3/s. All of the results are presented in intelligible charts and images.

This master's thesis consists of three main parts. The first section describes some types of fish crossings and basic information of their design. There is also marginally described program HEC-RAS. The second part is about the Zuberská weir and Osek stage. I review here fish ladders according to the original drawings in the HEC-RAS and suggest possible options to address these passable fish crossings for the fish crew. The last section is devoted to Mikulenkov weir where the fish crossing has been completely removed. Here I propose a new fish ramp according to modern knowledge and applicable standards. I also review the proposed fish ramp in the HEC-RAS program in order to verify the hydraulic characteristics.

The thesis deals with values of overfall discharge coefficients for commonly used types of low weirs. Comparison of their values with values based on established procedures. Determination of low weir capacity at free and submerged overfall.

This report was sponsored by the Utah Department of Transportation (UDOT) to determine if stream restoration structures could be used as scour countermeasures near state highways and bridges. Scour countermeasures that are effective in preventing erosion exist but that are not so friendly for aquatic organisms. UDOT is interested in finding a countermeasure that is both effective in preventing erosion while not harming aquatic organisms. Stream restoration structures are friendly for aquatic organisms but are prone to failure when flows exceed the design levels. David Rosgen has developed restoration structures that are friendly for aquatic organisms and that have provided streambank protection. These structures are the J-Hook vane, Cross-Vane and W-Weir. Based research done in this report, Cross-Vanes and W-Weirs are best suited to protect bridges because they will protect both sides of a stream bank. For these restoration structures to be reliable at higher flows and shear stresses experienced at bridges, they must follow the design criteria specified in this report. One of the most important design requirements is that the structures designed by David Rosgen have an attached floodplain where the structure meets the streambank. The floodplain disperses the energy of the flow, reducing shear stress. In the vicinity of some bridges, a floodplain cannot be implemented. In such cases, culverts can be installed at the floodplain level, that pass under the bridge to help reduce shear stresses, mimicking a floodplain. Cross-Vanes and W-Weirs can be used to protect bridges and other infrastructure. Based on modeling and comparing restoration structures to a labyrinth weir, they still have an impact on higher flows. At higher than design flows, such as experienced at bridges, the structures help to reduce shear stresses. To further investigate their use as a scour countermeasure near bridges, it is recommended that a structure be installed near a bridge following this report's design criteria. This will be determined depending on available funding.

It is suitable to add practical illustrations of hydraulic tasks during teaching hydraulics and hydrology. These practical illustrations can be realized by mobile hydraulic circuit which is situated in the auditorium. This thesis is focused on constructional and project solution of the circuit which consists of a compensatory tank with sufficient capacity, pump aggregate and hydraulic measure flume. The construction of hydraulic flume must enable quick, simple and safety installation of a scaled down models of a hydro technical structures. The main requirements of a mobile teaching circuit are clearness of practical hydraulic illustrations, compact dimensions, comparatively low weight, mobility and simple control and manipulation. This diploma thesis also includes design of a scaled down models of a hydro technical structures, especially set of plate weirs, bed-crested weir, ogee-crested weir, culvert, Venturi flume, sluice and radial gate, pier and roughened bed. The hydraulic circuit drawing part also includes instrument carrier with level gauge. This diploma thesis includes theoretical text part, technical report of designed objects, hydraulic calculations and drawing part.

This master´s thesis deals with the problem of measuring flow, especially using the method of Q/H characteristics. It describes the thin-plate weir and mentions specific channels. The master´s thesis suggests options of monitoring flow capacity in fixed proffiles with free surface. The master´s thesis also includes an experiment, which is focused on simulation of substandard tributary flowing proportions before weirs for determining their effect on Q/H characteristcs. The experiment is carried out on a thin-plate weir with a rectangular notch at the Department of Water Structures at the Faculty of Civil Engeneering in Brno. Another part of the master´s thesis is data processing to get an idea about the impact of the phenomenon in real applications. Finally, options are recommended for follow-up research.

One of the first Czech research papers on self-publishing. Even though unsuccessful and forbidden authors could publish a book on their own in the past, the current phenomenon of self-publishing can be arranged on-line in just a few clicks and for much cheaper. Self- publishing began to spread since circa 2005 - in the Czech Republic and abroad simultaneously. This thesis shows how the development has unfolded differently in the Czech Republic and in the USA, which is considered the cradle of this technology. The first chapter of this thesis analyzes the history of book publishing and many different ways to publish a book, and defines self-publishing. The second chapter shows how the new technologies and media influenced the expansion of self-publishing. The third chapter analyzes and puts into context some of the Czech and the American self-publishing portals, and compares the providers of these services. Many professionals - editors, authors, and literary critics - criticize self-publishing for its amateurism and low quality content, which this work takes into account as well. This paper also documents some of the rare cases of self-published authors, who managed to succeed despite the tough competition from traditional publishing houses. In the last chapter the whole process of self-publishing...