Determination of bed roughness in short sections of the natural Křtinský potok stream by direct measurement of grain size and velocity and with the use of a hydraulic model, and their comparison for the purposes of practical use.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F10%3A00157360" target="_blank" >RIV/62156489:43410/10:00157360 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Determination of bed roughness in short sections of the natural Křtinský potok stream by direct measurement of grain size and velocity and with the use of a hydraulic model, and their comparison for the purposes of practical use.
Original language description
The target of the study was to compare three distinct methods of bed roughness determination in a small water channel and mainly to compare their applicability in technical practice. Two of the methods (using a current meter and a mathematical model) were based on indirect determination of roughness when measuring and calculating other quantities. The third method (grain size analysis) is the standard one and was principally used for value comparison. The most appropriate method to determine channel bedroughness is analysis of bed material, determination of the representative grain size, and subsequent calculation of the actual roughness. Nevertheless, as mentioned above, the precisely determined value of bed roughness does not necessarily correspondthe reality. However, that determination of roughness represents the main problem in calculation. Determination based on grain size analysis is applicable in most situations.
Czech name
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Czech description
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Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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