A comparison of models for estimating potential evapotranspiration for Florida land cover types

Abstract

summary We analyzed observed daily evapotranspiration (DET) at 18 sites having measured DET and ancillary climate data and then used these data to compare the performance of three common methods for estimating potential evapotranspiration (PET): the Turc method (Tc), the Priestley–Taylor method (PT) and the Penman–Monteith method (PM). The sites were distributed throughout the State of Florida and represent a variety of land cover types: open water (3), marshland (4), grassland/pasture (4), citrus (2) and forest (5). Not surprisingly, the highest DET values occurred at the open water sites, ranging from an average of 3.3 mm d � 1 in the winter to 5.3 mm d � 1 in the spring. DET at the marsh sites was also high, ranging from 2.7 mm d � 1 in winter to 4.4 mm d � 1 in summer. The lowest DET occurred in the winter and fall seasons at