131 research outputs found

    Preliminary dam-break flow analysis of four embankment dams in Slovenia

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    Graduation thesis is discussing dam-break flow of four embankment dams in Celje region: Trnava, Lahovnica, Loče and Radigaj. All four objects were constructed in the second half of twentieth century. They have not been maintained properly in the last decade and according to findings of project VODPREG they do not meet the sufficient safety criteria. This means that these four dams represent high level of hazard for downstream area. We were interested on determining estimative hazard rating for downstream area using Simplified Dam-Break (SMPDBK) Flood Forecasting Model, developed by National Weather Service. First we evaluated how suitable simplified methods are for\ud preliminary analysis by comparing the results of Trnava and Loče with already existing reports in which calculations were made by using proper 1D dam-break models. The calculations were made for instantaneous and gradual breach formations. The result consists of peak flow values at specific cross sections, their respective depths and time required for the peak to reach each cross section. Based on\ud the results of the analysis flood maps of downstream areas were created. This is how we have defined the preliminary dam-break flood hazard rating for all four downstream areas

    Commercial phenotypic tests (API 20E) in diagnosis of fish bacteria

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    The available data concerning rapid identification of fish bacteria via commercial phenotypic tests demonstrate that there is no agreement regarding the choice of selection of the tests. However, API 20E, an identification system for Enterobacteriaceae and other non-fastidious Gram-negative rods developed for clinical specimens, seems to be increasingly used for the identification of fish pathogens. In this work, adaptation of API 20E for fish bacterial isolates and its distinctiveness for fish bacteria was assessed. For some bacterial fish isolates, their identification must be regarded as only presumptive. Some strains are wrongly identified because they are not included in the database of API 20E system. For comparable results, API 20E has to be adapted for bacterial fish isolates, and there should be a consensus among the fish health professionals regarding the incubation temperature and the duration of the incubation time before performing readings. API 20E reactions should be compared with the diagnostic schemes based on reactions in conventional phenotypic tests. Due to their significance for fish health and impact on the aquaculture, and because of the need for their rapid identification, some important fish bacteria should be included in the API 20E system, such as Yersinia ruckeri, Edwardsiella ictaluri, Vibrio anguillarum
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