[1]DUAN Yanan,JI Xuan,GUO Ruoyu,et al.Analysis on the Sensitivity and Dominant Meteorological Factors Identification of Potential Evapotranspiration Variation in Yarlung Zangbo River Basin[J].Research of Soil and Water Conservation,2020,27(02):261-268.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
261-268
Column:
Public date:
2020-03-30
- Title:
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Analysis on the Sensitivity and Dominant Meteorological Factors Identification of Potential Evapotranspiration Variation in Yarlung Zangbo River Basin
- Author(s):
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DUAN Yanan1,5, JI Xuan2,3, GUO Ruoyu2,3, WANG Jing4, BAI Yang4
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(1.School of Resources, Environment and Earth Science, Yunnan University, Kunming 650500, China; 2.Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; 3.Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650091, China; 4.Hydrology and Water Resources Survey Bureau of the Tibet Autonomous Region, Lhasa 850000, China; 5.College of Architecture and Environment, Sichuan University, Chengdu 610065, China)
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- Keywords:
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potential evapotranspiration; Penman-Monteith; dominant meteorological factor; Yarlung Zangbo River Basin; international river
- CLC:
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P426.2
- DOI:
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- Abstract:
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Analysis on the sensitivity of potential evapotranspiration is one of the basic research topics of water cycle respons to climate change. Based on the ground meteorological data in the Yarlung Zangbo River Basin, we calculated the daily potential evapotranspiration from 1961 to 2012 by using the Penman-Monteith formula, and analyzed its temporal and spatial distribution characteristics. On these bases, the sensitivity of potential evapotranspiration to four meteorological factors(average temperature, wind speed, solar radiation, and relative humidity)and the contribution rate of each meteorological factor to the variation of potential evapotranspiration were also calculated, and then the more sensitive factor and the dominant factor were identified. The results showed that:(1)from 1961 to 2012, the potential evapotranspiration in the Yarlung Zangbo River Basin presented the significantly increasing trend with an increase of 8.81 mm/decade; the annual potential evapotranspiration had obvious spatial distribution characteristics that was higher in mid-stream valley than in other regions;(2)with respect to most regions of the Yarlung Zangbo River Basin, the potential evapotranspiration was more sensitive to solar radiation, and followed by average temperature, relative humidity, wind speed; and the contribution rate of each meteorological factor decreased in the order: average temperature>wind speed>relative humidity>solar radiation. In general, the average temperature was the leading factor responsible for the change of the potential evapotranspiration in the Yarlung Zangbo River Basin between 1961 and 2012.