[1]MENG Yu,DAN Wenhong,WANG Huan.Spatiotemporal Characteristics of Evapotranspiration and Its Affecting Factors in Wujiang Basin Based on MOD16[J].Research of Soil and Water Conservation,2020,27(06):139-145.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
139-145
Column:
目次
Public date:
2020-10-20
- Title:
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Spatiotemporal Characteristics of Evapotranspiration and Its Affecting Factors in Wujiang Basin Based on MOD16
- Author(s):
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MENG Yu1, DAN Wenhong2, WANG Huan1
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(1.School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China; 2.Key Laboratory of Information and Computing Science of Guizhou Province, Guizhou Normal University, Guiyang 550001, China)
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- Keywords:
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evapotranspiration; spatiotemporal characteristics; affecting factors; MODIS; Wujiang Basin
- CLC:
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P426.2
- DOI:
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- Abstract:
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To explore the spatialtemporal characteristics of surface evapotranspiration(ET)and its affecting factors in Wujiang Basin, Guizhou Province, MOD16A2/ET products and weather station data, trend analysis and correlation analysis were used to explore the spatiotemporal variation characteristics of ET and its affecting factors. The results show that:(1)from 2000 to 2014, the interannual ET in Wujiang Basin fluctuated greatly, and the annual ET showed a cyclical unitary change trend; the seasonal change of ET decreased in the order: summer(311.31 mm)>spring(245.57 mm)>autumn(138.10 mm)>winter(132.51 mm);(2)ET spatial heterogeneity of Wujiang Basin was significant, showing a spatial pattern of low level in the west and high level in the east; the average ET value was between 605.43 mm and 1 208.26 mm;(3)the influence range of each climate factor on ET decreased in order: precipitation(30.67%)>air temperature(29.56%)>sunshine hours(23.84%), the three pairs of ET were mainly positively correlated. Although the spatiotemporal distribution characteristics of ET in Wujiang Basin were controlled by climate factors, the influence degree and range of each factor on ET were significantly different.