基于SEBS-METRIC方法的黑河流域中游地区农田蒸散  

Estimation of field evapotranspiration in the middle reaches of Heihe River basin based on SEBS-METRIC method

作　　者：何磊[1] 王瑶[2] 别强[1] 方镜尧[2] 赵传燕[2] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]兰州大学生命科学学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2013年第4期504-510,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金重点项目(91025015)

摘　　要：使用涡度相关蒸散数据验证表明SEBS-METRIC方法可以用来估算黑河流域中游地区作物农田蒸散.结果显示：黑河流域中游地区作物生长季内ET 总量空间差异大（398～709 mm,平均567 mm）.在作物不同生长阶段, ET 在时间和空间上变化剧烈.在区域平均水平上,生长初期、生长中期1、生长中期2和生长后期的ET 占全生长季ET 总量的比例分别为10.24%,29.44%,47.11%,13.21%,各生长阶段区域平均日ET 依次为1.45,3.28,3.52,2.08 mm/d. ET 月份变化明显,3月最小,4,5月迅速增大,6月达到生长季的蒸散高峰,7,8月有所降低,维持在一定水平,9月作物进入生长末期,迅速降低.It was shown that the field evapotranspiration （ET ） of crops in the middle reaches of Heihe River basin estimated by the SEBS-METRIC method was valid. According to resulted analysis, a large difference in ET in crop growth season of the research area existed, which was distributed from 398 mm to 709 mm, with the average being 567 mm. ET changed greatly in different crop growth stages. The average ET of the initial growth, medium growth 1, medium growth 2 and later stage of growth were 1.45, 3.28, 3.52, 2.08 mm/d respectively. The percentages of total ET at different growing stages were 10.24%, 29.44%, 47.11% and 13.21% respectively. ET also showed obvious monthly changes. The value was the lowest in March, then increased rapidly in April and May. The greatest amount of water required of the growth stage was reached in June, with ET decreasing a little and being maintained at a certain level in July and August, and then decreasing rapidly in September.

关 键 词：SEBS METRIC 农田蒸散 黑河流域中游地区 

分 类 号：S161.4[农业科学—农业气象学]