Use of Lysimeters to Measure Fog Interception in Tussock Grassland New Zealand

by B. D. Fahey, Forest Research Inst, Christchurch, New Zealand,
D. L. Murray, Forest Research Inst, Christchurch, New Zealand,
R. M. Jackson, Forest Research Inst, Christchurch, New Zealand,
D. I. Campbell, Forest Research Inst, Christchurch, New Zealand,



Document Type: Proceeding Paper

Part of: Lysimeters for Evapotranspiration and Environmental Measurements

Abstract: Previous studies of the water balance of single Tussock plants in small non-weighing lysimeters over a range of elevations in east-central Otago province suggest that tussock grassland can augment runoff by interception of fog. In a separate study a large weighing lysimeter consisting of a monolith (surface area 5.8 m2) containing nine undisturbed snow tussocks was used to measure evapotranspiration and fog interception. Small weight gains were attributed to fog interception and drip. The lysimeter has now been moved to a more fog-prone site. The details of the previous lysimeter studies, and a description of the large weighing lysimeter and associated micrometeorolgical instrumentation are presented in this paper.

Subject Headings: Measuring instruments | Rangeland | Water resources | Meteorology | Water balance | Evapotranspiration | Concrete blocks | Runoff | New Zealand

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