Changes of aerodynamic characteristics of maize during growing season.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A_____%2F02%3A21500013" target="_blank" >RIV/62156489:_____/02:21500013 - 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
Changes of aerodynamic characteristics of maize during growing season.
Original language description
In this contribution variations in the zero plane displacement (d), dynamic roughness length (z0), drag coefficient (CD), and the aerodynamic resistance (ra) for maize canopy during one growing season were investigated. With this aim the vertical wind spcanopy during the whole vegetation season were analysed. The needed experimental data were obtained at the experimental station in Žabčice, Czech Republic (lat. 49o 01, N, long. 16o 37,E, and alt. 179 m a.s.l.), from May to October 2000. as the canopy increased in height (h) and leaf area index. We accepted the fact, that the relation d = (2/3)h is well representative for agricultural crop covered surfaces. Throughout the season, roughness length z0 started at 0.04 m (monthly average in in August) for closed maize canopy surface. The mean z0 value of closed maize canopy surface was found to be 0.22 m and the mean value of ratio z0/(h-d) was 0.30 of mean canopy height of 2.20 m (August ? October 2000).
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GC - Plant growing, crop rotation
OECD FORD branch
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Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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