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[1]WANG Yaqian,YUE Yongjie,WU Yunzhula,et al.Temporal and Spatial Distribution Characteristics of Evapotranspiration in Genhe River Basin Based on Soil and Water Assessment Tool Model[J].Research of Soil and Water Conservation,2022,29(01):256-263.

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Temporal and Spatial Distribution Characteristics of Evapotranspiration in Genhe River Basin Based on Soil and Water Assessment Tool Model

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 256-263 Column: Public date: 2022-02-20

Title:: Temporal and Spatial Distribution Characteristics of Evapotranspiration in Genhe River Basin Based on Soil and Water Assessment Tool Model

Author(s):: WANG Yaqian¹, YUE Yongjie¹, WU Yunzhula², YI Lixi¹, LI Xu¹, ZHAO Kai¹; (1.College of Forestry, Inner Mongolia Agricultural University, Hohhot 010010, China; 2.Meteorological Bureau of Wulan County, Haixi Prefecture, Qinghai 817100, China)

Keywords:: evapotranspiration; Genhe River Basin; temporal and spatial distribution; permafrost region; soil and water assessment tool model

CLC:: P333.9

DOI:: -

Abstract:: To analyze the temporal and spatial distribution characteristics of evapotranspiration and potential evapotranspiration in Genhe River Basin of Erguna River system, soil and water assessment tool model, and correlation analysis were used to study the interannual and intra annual variation process and spatial distribution pattern of evapotranspiration and potential evapotranspiration in Genhe River Basin in the past 38 years. The variation characteristics of evapotranspiration and potential evapotranspiration of different land use types were analyzed, and the relationship between meteorological factors and evapotranspiration was discussed. The results show that:(1)from 1980 to 2017, the ET and PET of Genhe River Basin showed an overall increasing trend;(2)the annual variation of ET and PET in Genhe River Basin increased first and then decreased;(3)the distribution pattern of ET in Genhe River Basin was higher in the upper reaches and lower in the middle and lower reaches, and the peak value of ET appeared in the upper reaches; the spatial distribution pattern of PET follows the sequence: southwest>northeast>southeast; there were obvious spatial differences in ET and PET in the upper, middle and lower reaches of Genhe River Basin;(4)in the Genhe River Basin, the ET in the growth period, the complete freezing period and the thawing period all showed the increasing trend, while the ET in the initial freezing period showed the decreasing trend; the average ET of the four periods showed the significant difference, which showed the order: the growth period>the thawing period>the initial freezing period>the complete freezing period;(5)in Genhe River Basin, the order of annual ET mean value in different land cover types was: woodland>grassland>cultivated land >construction land>swampland, while the order of PET was farmland>construction land>woodland>grassland>marshland;(6)there is a significant positive correlation between evapotranspiration and precipitation and temperature in Genhe River Basin. The results of this study have important reference significance for evapotranspiration change and freeze-thaw effect on the local ecosystem.

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Last Update: 2022-02-20