摘要
以中国东南沿海6个省市地区为研究区,基于GLEAM卫星遥感数据对该区1980-2020年地表蒸散发的时空演变特征进行分析研究。研究利用Mann–Kendall趋势检验和功率谱小波分析,分别从年、季节等尺度分析了蒸散发的变化趋势和周期特征。结果表明,我国东南沿海地区近40年的地表蒸散发呈现显著的增加趋势,增速为1.87 mm/a。其中,夏季对于年蒸散发量的贡献最大,贡献率为36.15%;春季对于蒸散发量增速的贡献最大,贡献率为36.73%。蒸散发在年尺度上无明显的周期性,但在季节尺度上却表现出明显的周期性规律。研究结果可为我国东南沿海地区水文循环演变规律等研究工作提供科学参考。
Based on GLEAM satellite remote sensing data,the temporal and spatial evolution characteristics of surface evapotranspiration from 1980 to 2020 in 6 provinces and cities along the southeast coast of China were analyzed.The Mann-Kendall trend test and power spectrum wavelet analysis were used to analyze the trend and periodic characteristics of evapotranspiration from the annual and seasonal scales.The results show that the surface evapotranspiration in southeast coastal areas has shown a significant increasing trend in the past 40 years,with a growth rate of 1.87 mm/a.Summer contributed the most to annual evapotranspiration,accounting for 36.15%.Spring contributed the most to the growth of evapotranspiration,accounting for 36.73%.Evapotranspiration showed no obvious periodicity on the annual scale,but showed obvious periodicity on the seasonal scale.The results of this study can provide scientific reference for the study of hydrological cycle evolution in southeast coastal areas.
作者
魏炜
莫崇勋
WEI Wei;MO Chong-xun(Guangxi Transport Vocational and Technical College,Nanning 530023,China;College of Architecture and Civil Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Disaster Prevention and Mitigation Safety,Nanning 530004,China)
出处
《节水灌溉》
北大核心
2023年第4期9-17,共9页
Water Saving Irrigation
基金
国家自然科学基金项目(52269002,51969004)
广西高校中青年教师科研基础能力提升项目(2022KY1132,2019KY1345)
广西交通职业技术学院校级科学研究项目(JZY2020KAZ10)。
关键词
遥感数据
蒸散发
演变趋势
时空分析
东南沿海
remote sensing data
evapotranspiration
evolution trends
spatiotemporal analysis
southeast coast
