WegenerNet Feldbach Region - Austria

The Raba (Raab) is the main river of the region. Mean annual aeral precipitation and variability (1961-1990):
- Mean annual aeral precipitation using water balance data: 700 mm - 850 mm
- Minimum annual precipitation depth: 550 mm - 700 mm
- Range of annual precipitation depth: 400 mm - 550 mm
- Coefficient of variation of annual precipitation depth: 12% - 16%
- Percentage of summer precipitation in mean annual precipitation: 65% - 70%

Extreme multi-day precipitation (1961-1990):
- Maximum precipitation (2 days): 100 mm - 125 mm
- Maximum precipitation (4 days): 125 mm - 150 mm
- Maximum precipitation (6 days): 150 mm - 200 mm

Duration of dry spells (1971-1999):
- Mean duration of dry spells (Threshold 0.2 mm): 4 days - 5 days
- Mean maximum duration of dry spells (Threshold 0.2 mm): 22 days - 26 days

Evapotranspiration and runoff (1961-1990):
- Mean annual potential evapotranspiration: 625 mm - 650 mm
- Mean annual aeral actual evapotranspiration using water balance data: 550 mm - 600 mm
- Mean annual depth of runoff using water balance data: 0mm - 250 mm

Seasonal water balance (1961-1990):
- Change of water storage during autumn (Sep-Nov): (25 mm) - (50 mm)
- Change of water storage during spring (Mar-May): (-50 mm) - (-75 mm)
- Change of water storage during winter (Dec-Feb): (25 mm) - (50 mm)
- Change of water storage during summer (Jun-Aug): (-25 mm) - (25 mm)