Abstract
Hourly measurements of evaporation of intercepted rainfall were made for six months in a Sitka spruce forest in Central Wales (UK) with an eddy-correlation system. Sensible heat flux was measured with a three-dimensional sonic anemometer mounted on a mast above the forest, and evaporation was solved as the residual in the energy balance equation. Hourly evaporation was also estimated with the Penman–Monteith equation, using the eddy-correlation measurements to estimate the aerodynamic conductance. Wind direction dependent differences in surface roughness caused the aerodynamic conductance to vary from 0.09 to 0.29 m s−1 at the average wind speed. Average measured (0.12 mm h−1) and estimated (0.09 mm h−1) wet canopy evaporation rates agreed reasonably well with a previously estimated Penman–Monteith value of 0.13 mm h−1 for the same forest [J. Hydrol. 48 (1980) 89].
Original language | English |
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Pages (from-to) | 12-19 |
Journal | Journal of hydrology |
Volume | 276 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 2003 |
Keywords
- WRS
- ADLIB-ART-2258
- n/a OA procedure