应用生态学报2013，Vol.24Issue(4)：1055-1062,8.
黑河上游山区草地蒸散发观测与估算
Measurement and estimation of grassland evapotranspiration in a mountainous region at the upper reach of Heihe River basin, China
摘要
Abstract
Evapotranspiration (ET) is an important component of water cycle, but its measurement in high altitude mountainous region is quite difficult, inducing the insufficient understanding on the actual ET in high altitude mountainous region and the effects of ET on this region' s water cycle. In this paper, two small type weighing mini-lysimeters were applied to measure the daily ET in a piece of grassland in a high altitude mountainous region of the Heihe River basin from July 1st, 2009 to June 30th, 2010. Based on the measured data, the methods of FAO-56 Penman-Monteith (F-P-M) , Priestley-Taylor (P-T) , and Hargreaves-Samani (H-S) were employed to estimate the ET to analyze the applicability of the three methods for the mountainous region, and the pan coefficient at the measurement spots was discussed. During the measurement period, the total annual ET at the measurement spots was 439. 9 mm, accounting for 96. 5% of the precipitation in the same period, and the ET showed an obvious seasonal distribution, being 389.3 mm in May-October, accounting for 88.5% of the annual value. All the three methods could be well applied to estimate the summer ET but not the winter ET, and their applicability followed the sequence of P-T > F-P-M > H-S. At the measurement spots, the daily pan coefficient in summer was 0. 7-0. 8, while that in winter was quite variable.关键词
黑河上游/蒸散发/蒸渗仪/蒸发皿系数Key words
upper reach of Heihe River basin/ evapotranspiration/ micro-lysimeter/ pan coeffi-cient分类
天文与地球科学引用本文复制引用
阳勇,陈仁升,宋耀选,刘俊峰,韩春坛,刘章文..黑河上游山区草地蒸散发观测与估算[J].应用生态学报,2013,24(4):1055-1062,8.基金项目
国家自然科学基金重大计划之重点支持项目(91025011)、国家自然科学基金项目(91125013)和国家优秀青年自然科学基金项目(41222001)资助. （91025011）
