伊犁河流域地表蒸散量时空特征分析  

Temporal and Spatial Characteristics of Surface Evapotranspiration in the Ili River Basin

作　　者：梁红闪 王丹 郑江华[1,2,3] LIANG Hongshan;WANG Dan;ZHENG Jianghua(College of Resources and Environmental Sciences,Xinjiang University,Urumqi 830046,China;Institute of Arid Ecology and Environment,Xinjiang University,Urumqi 830046,China;Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学资源与环境科学学院,乌鲁木齐830046 [2]新疆大学干旱生态与环境研究所,乌鲁木齐830046 [3]新疆大学绿洲与生态重点实验室,乌鲁木齐830046

出　　处：《灌溉排水学报》2020年第7期100-110,共11页Journal of Irrigation and Drainage

基　　金：国家社会科学基金重大项目(17ZDA064);教育部促进与美大地区科研合作与高层次人才培养项目(117-40101)。

摘　　要：【目的】探究伊犁河流域􀀁2000—2014年蒸散量时空特征,为跨境水资源确权与分配提供依据。【方法】本文利用变异系数、Theil-Sen median趋势分析、Mann-Kendall和􀀁Hurst指数方法研究了伊犁河流域􀀁2000—2014蒸散量时空变化特征及波动性。【结果】①伊犁河流域多年平均蒸散量值为􀀁249.80 mm,其波动范围在􀀁224.03~274.10 mm之间。②多年平均􀀁ET值在空间上具有明显差异,取值范围在􀀁115.6~758.79 mm之间,总体上呈自上游向下游减少的空间格局。③该流域年内蒸散量具有明显的季节差异,总体呈先增后减的单峰波趋势。④该流域内各土地利用多年平均蒸散量表现为:耕地(327.23 mm)>林地(319.10 mm)>草地(239.50 mm)>稀疏植被(151.67 mm)。⑤􀀁2000—2014年该流域的多年平均􀀁ET整体上变异程度不明显,变异程度中比较稳定和稳定所占面积比为􀀁85.47%;变异系数在空间上取值范围为􀀁0.01~0.71,其平均值为􀀁0.097。⑥整个流域内􀀁ET减少的趋势和增加的趋势所占面积比例分别为􀀁64.48%和􀀁26.72%,变化趋势以减小为主,变化率为-1.152 mm/a,该流域未来􀀁ET的变化状况与过去一致,以持续性减少为主。【结论】利用变异系数、Theil-Sen median趋势分析、Mann-Kendall和􀀁Hurst指数方法能够有效发现伊犁河流域时空变化特征,研究结果可为伊犁河流域规划及合理分配流域水资源提供依据。【Objective】This paper is to explore the temporal and spatial characteristics of the evapotranspiration in the Ili River Basin from 2000 to 2014,and to provide a basis for the determination and distribution of cross-border water resources.【Method】In this paper,the temporal and spatial variation characteristics and volatility of evapotranspiration in the Ili River Basin were studied by using the methods of variation coefficient,Theil-Sen median,Mann-Kendall and Hurst index.【Result】The result showed that:①The annual average evapotranspiration of the Ili River Basin was 249.80 mm,and its fluctuation range was 224.03~274.10 mm.②The average ET value of multi years had obvious difference in space,ranging from 115.6 mm to 758.79 mm,which showed the spatial pattern of decreasing from upstream to downstream.③The annual evapotranspiration of the basin had obvious seasonal difference,and the overall trend of unimodal wave increased first and then decreased.④The annual average evapotranspiration of land use in the basin was as follows:cultivated land(327.23 mm)>forest land(319.10 mm)>grassland(239.50 mm)>sparsely vegetation(151.67 mm).⑤During the study period,the variation degree of annual average ET in the basin was not obvious as a whole,and the proportion of stable and stable areas in the variation degree was 85.47%.The spatial value range of variation coefficient was 0.01~0.71,and the average value was 0.097.⑥The decreasing trend and increasing trend of ET in the whole basin account for 64.48%and 26.72%of the total area,respectively.The main trend of ET change was decreasing,with a change rate of-1.152 mm/a.The future change of ET in the basin is consistent with the past,with a continuous decrease as the main trend.【Conclusion】Using the methods of variation coefficient,Theil-Sen median,Mann-Kendall and Hurst index,the temporal and spatial variation characteristics of the Ili River basin can be found effectively.The research results can provide a basis for planning and rational distribution of w

关 键 词：蒸散 MOD16 流域 时空特征 趋势分析 

分 类 号：K903[历史地理—人文地理学]