摘要
潜在蒸散发量(E_(ET0))是制定农业灌溉管理制度的重要参考指标,为分析黑龙江省1964~2013年作物生长季(5~10月)的E_(ET0),首先采用Penman-Monteith法计算E_(ET0);其次利用反距离加权(IDW)法计算E_(ET0)的空间变化特征,根据改进的Mann-Kendall(M-K)法分析E_(ET0)的时间变化特征;最后利用敏感系数法分析E_(ET0)对各气象因子的敏感性。结果表明,黑龙江省作物生长季的多年平均E_(ET0)在空间上大致呈西高东低和南高北低的特征,其值变化范围为437~694mm;时间上总蒸发量呈显著下降趋势,减少率为-7.2mm/10a,其中5月份减少幅度最大,减少率为-2.9 mm/10a;E_(ET0)对相对湿度的变化最为敏感,相对湿度的增加是导致E_(ET0)减少的直接原因。
Potential evapotranspiration（EET0）is an important reference for the formulation of agricultural irrigation management systems.The Penman-Monteith method was used to calculate the EET0 in Heilongjiang Province during the crop growth season（May-October）from 1964 to 2013.And then the spatial interpolation was performed using the inverse distance weighting（IDW）method to characterize the spatial variation of EET0.The modified Mann-Kendall（M-K）method was used to analyze the time variation characteristics of EET0.Sensitivity coefficient method was adopted to analyze the sensitivity of EET0 to meteorological factors.The results show that the multi-year average EET0 of the crop growth season in Heilongjiang Province is roughly spatially high in the west and low in the east and low in the south and high in the north.Its value range varies from 437 to 694 mm.In the growth season,the total evaporation showed a significant downward trend with a reduction rate of-7.2 mm/10 a,the largest decrease happened in May with a reduction rate of-2.9 mm/10 a.Relative humidity Change is the most sensitive factor to EET0,and the increase of relative humidity is the direct cause of the reduction in EET0.
作者
姜宇
杜崇
孙海宁
钟洋
JIANG Yu,DU Chong,SUN Hai-ning,ZHONG Yang(School of Hydraulic and Electric Power, Heilongjiang University, Harbin 150080, Chin)
出处
《水电能源科学》
北大核心
2018年第5期6-9,共4页
Water Resources and Power
基金
"十二五"农村领域国家科技计划课题重庆市科学基金项目(2014BAD12B01)
关键词
潜在蒸散发量
作物生长季
敏感性
黑龙江省
potential evapotranspiration
crop growth season
sensitivity
Heilongjiang Province
