Proceedings zur 6. Fachtagung BIOMET - Deutsche ...
Proceedings zur 6. Fachtagung BIOMET - Deutsche ...
Proceedings zur 6. Fachtagung BIOMET - Deutsche ...
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Abb. 1: Die berechnete Windgefährdung in 5 Gefährdungsstufen<br />
Fig. 1: Calculated risk of wind in 5 risk classes<br />
N<br />
Weinbau<br />
Höhenlinien<br />
Bach<br />
Wege und Straßen<br />
Gewässer<br />
Siedlung<br />
Wald<br />
Windgefährdung<br />
0 - keine<br />
1 - schwach<br />
2<br />
3<br />
4 - stark<br />
100 0 100 200 Meter<br />
Die mit dem Windmodell MUKLIMO_3 berechneten Windgeschwindigkeiten in der Vegetationsperiode<br />
wurden in fünf Windgefährdungsstufen umgewandelt (siehe Abb.1). Für den<br />
größten Teil der rot markierten Rebflächen liegt nur eine schwache Windgefährdung vor. Für<br />
höher gelegene Rebflächen, die sich auf der Kuppe befinden und damit besonders windoffen<br />
sind, nimmt die Windgefährdung deutlich zu.<br />
Abb. 2 zeigt die in Kaltluftgefährdungsstufen umgewandelten Ergebnisse des Kaltluftabflussmodells<br />
KLAM_21. Im betrachteten Ausschnitt treten nur die Gefährdungsstufen 4 bis 7<br />
auf.<br />
Die Kaltluft wird auf den Höhen gebildet und fließt dann in das Moseltal ab. Hindernisse<br />
stauen die Kaltluft, was deutlich in der Umgebung von Machtum zu erkennen ist.<br />
Der Energiegewinn durch die Sonnenstrahlung ist ein entscheidender Faktor für die Güte einer<br />
Weinbergsfläche. Eine höhere Hangneigung wirkt sich positiv auf den Strahlungsgewinn<br />
für Hangrichtungen im Bereich zwischen Südwest und Südost aus. Bei West-Süd-West und<br />
Ost-Süd-Ost orientierten Hängen ist kaum noch eine Änderung im Strahlungsgewinn mit höheren<br />
Hangneigungen zu verzeichnen. Liegen die Hangneigungen zwischen West bis Nord<br />
bzw. Nord bis Ost sind höhere Hangneigungen ungünstig, denn die auftreffende Strahlung<br />
geht deutlich <strong>zur</strong>ück. Gut ist dies in Abb. 3 für die Rebflächen oberhalb von Machtum zu erkennen.<br />
Der Hang ist im oberen Teil deutlich steiler als im unteren. Klimatisch begünstigt<br />
sind die nach Süd-Ost orientierten Hänge an der Mosel.
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