| Cite this article: | 梁红闪,王丹,郑江华.伊犁河流域地表蒸散量时空特征分析[J].灌溉排水学报,0,():-. |
| lianghongshan,wangdan,ZHENG Jianghua.伊犁河流域地表蒸散量时空特征分析[J].灌溉排水学报,0,():-. |
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| Temporal and Spatial Characteristics of Surface Evapotranspiration in the Ili River Basin |
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lianghongshan,wangdan,ZHENG Jianghua
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Xinjiang University
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| Abstract: |
| Abstract: 【Objective】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 Ili River Basin were studied by using the methods of variation coefficient, Theil-Sen median, Mann-Kendall and Hurst index. 【Result】The results showed that: 1) The annual average evapotranspiration of Ili River Basin was 249.80 mm, and its fluctuation range was 224.03~274.10 mm. 2) The average et value of many years had obvious difference in space, the value range was between 115.6 mm and 758.79 mm, which showed the spatial pattern of decreasing from upstream to downstream. 3) The annual evapotranspiration of the basin had obvious seasonal difference, and the trend of increasing first and then decreasing appears as a whole. 4) The 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). 5) During 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. 6) The 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-1. 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 Ili River basin can be found effectively. The research results can provide basis for planning and rational distribution of water resources in Ili River Basin.
Key words: evapotranspiration; MOD16; Ili River Basin; temporal and spatial characteristics |
| Key words: evapotranspiration; MOD16; Ili River Basin; temporal and spatial characteristics |
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