Moehrlen, C,Kiely, G,Pahlow, M;

1999

Chemistry (Weinheim An Der Bergstrasse, Germany)

Long term water budget in a grassland catchment in Ireland

Validated

()

EVAPOTRANSPIRATION BALANCES

24

23

29

This paper describes some of the results of a one year hydrometeorological field experiment of a grassland catchment near Cork, Ireland (from November 1996 to November 1997). The objective of the experiment was to compare actual evapotranspiration from the annual water balance of a small catchment with Penman-Monteith reference evapotranspiration. In addition, Class A pan measurements are compared over a shorter period of 4 months with daily resolution. Actual evapotranspiration is 98% of Penman-Monteith reference evpotranspiration. In the investigated period (July to October 1997) Penman-Monteith reference evapotranspiration is 73% of Class A pan evaporation. The annual actual evapotranspiration from the water balance is 29.27 % of precipitation from the grassland. This suggests that for the humid Irish climate Penman-Monteith is a good estimate of actual evapotranspiration (for grasslands). (C) 1998 Elsevier Science Ltd. All rights reserved.