1982-2019年河北省宽城县潜在蒸散量变化特征

Variation Characteristics of Potential Evapotranspiration in Kuancheng County,Hebei Province from 1982 to 2019

以河北省宽城县1982—2019年日气象数据为基础,利用Penman-Monteinl方程对该区域近38年来潜在蒸散量的变化规律进行计算并分析。结果表明,宽城县潜在蒸散量的年变化和各季变化均呈增加趋势,除夏季外,年和其他各季的潜在蒸散量增加趋势明显;潜在蒸散量的年、季变化均发生了时间序列变化上的突变,除夏季外,年际和其他季节的突变显著;潜在蒸散量的年变化存在8~12 a的周期性变化规律,夏季潜在蒸散量的变化存在8~10 a的周期性变化规律,其他季节潜在蒸散量的周期性变化不明显。河北省宽城县潜在蒸散量的增加将进一步增加作物对灌溉量的需求,这需要引起河北省宽城县农业管理人员对合理灌溉的进一步重视。

According to the daily meteorological data from 1982 to 2019 in Kuancheng County,Hebei Province,the variation of potential evapotranspiration in the region in recent 38 years were calculated and analyzed through Penman-Monteinl equation.The results showed that the annual and seasonal variations of potential evapotranspiration in Kuancheng County had an increasing trend,the variations were obvious except summer.The annual and seasonal variations of potential evapotranspiration had abrupt changes in time series,and the abrupt changes were significant except for summer.The annual variation of potential evapotranspiration showed a periodic variation pattern of 8-12 years,and that of potential evapotranspiration in summer showed a periodic variation pattern of 8-10 years,while the periodic variation pattern of potential evapotranspiration in other seasons was not obvious.The increase of potential evapotranspiration in Kuancheng County of Hebei Province will further increase the demand of crop irrigation amount,which requires the agricultural management personnel to pay more attention to rational irrigation.