Changes of aerodynamic characteristics of maize during growing season.

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Changes of aerodynamic characteristics of maize during growing season.

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

Changes of aerodynamic characteristics of maize during growing season.

Popis výsledku anglicky

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).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GC - Pěstování rostlin, osevní postupy

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Contributions to Geophysics and Geodesy

ISSN

1335-2806

e-ISSN

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Svazek periodika

32

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

12

Strana od-do

225-236

Kód UT WoS článku

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EID výsledku v databázi Scopus

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