华北平原杨树人工林蒸散发估算研究

Estimating Evapotranspiration of Artificial Poplars in North China Plain Region

以华北平原人工杨树林为对象,应用Penman-Monteith、Priestley-Taylor和Hamon模型估算蒸散发量,并以Penman-Monteith模型估算结果为基准,对Priestley-Taylor和Hamon模型进行了修正。结果表明,修正前,Priestley-Taylor和Hamon模型与Penman-Monteith模型的相关系数分别为0.388和0.531,Hamon模型估算的月总蒸散发量结果偏高10.9mm,Priestley-Taylor估算的结果偏低27.3mm;修正后,Priestley-Taylor和Hamon修正公式,相关系数分别提高到0.731和0.761。

Based on the poplars of north China plain, Penman-Monteith, Priestley-Taylor and Hamon mod- el were applicated to estimate forest evaporation. Penman-Monteith model was taken as the benchmark to modify Priestley-Taylor and Hamon models. The results showed that compared with Penman-Monteith model, the correlation coefficients of Priestley-Taylor and Hamon models were 0. 388 and 0. 531, respec- tively. The monthly value of Hamon model was 10. 9 mm higher than Penman-Monteith model, with Priestley-Taylor model being 27.3 mm less than than Penman-Monteith model. After modified,the correla- tion coefficients of two models, compared with Penman-Monteith model, were respectively 0.731 and 0. 761.