ISHS Acta Horticulturae 664: IV International Symposium on Irrigation of Horticultural Crops
SLOPE AND ASPECT EFFECT ON EVAPORATION AS MEASURED BY ATMOMETER |
| Author: | B.A. Faber |
| Keywords: | atmometer, evapotranspiration, hill slope, irrigation, avocado |
| Abstract:
Atmometers were installed on four quadrants of a hill and at three positions on the slope – toe, mid-slope and top of hill. There was clear fetch of over 1 kilometer in all directions. The hill was within 2 kilometers from the ocean which was the prevailing wind direction for much of the day. Measurements were made over an eight month period from early summer to late winter in New Zealand. Wind played a dominant role in evaporative loss. Depending on the season, evaporative loss was affected more or less significantly by slope aspect. On all quadrants, greatest evaporative loss occurred at the top of slope and least occurred on the lee side of the hill which was most shaded. | |
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