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Quantifying the impact of climate variables on reference evapotranspiration in Pearl River Basin, China.
- Source :
- Hydrological Sciences Journal/Journal des Sciences Hydrologiques; Dec2019, Vol. 64 Issue 16, p1944-1956, 13p
- Publication Year :
- 2019
-
Abstract
- The impact of climate variables on monthly reference evapotranspiration (ET<subscript>o</subscript>) is a critical issue in water resources management and irrigation planning. The spatio-temporal contribution of climate variables to ET<subscript>o</subscript> in the Pearl River Basin (PRB), China, from 1960 to 2016 were calculated based on sensitivity and relative change of each climatic variable. The results show that annual ET<subscript>o</subscript> total decreased by 1.64% and diminished in magnitude from the southeast to the northwest. Sunshine duration, wind speed and relative humidity decreased by 15.5%, 7.4%, and 4.0%, respectively, while average temperature increased by 4.25%. The ET<subscript>o</subscript> showed a positive sensitivity to all variables except relative humidity, which showed a negative sensitivity. Sunshine duration had the highest contribution of −4.26%, and the overall decrease in ET<subscript>o</subscript> was mainly caused by the declines in sunshine duration and wind speed, which offset the positive impact of rises in average temperature and reduction in relative humidity. [ABSTRACT FROM AUTHOR]
- Subjects :
- WATERSHEDS
CLIMATOLOGY
EVAPOTRANSPIRATION
CLIMATE change
WIND speed
SUNSHINE
Subjects
Details
- Language :
- English
- ISSN :
- 02626667
- Volume :
- 64
- Issue :
- 16
- Database :
- Complementary Index
- Journal :
- Hydrological Sciences Journal/Journal des Sciences Hydrologiques
- Publication Type :
- Academic Journal
- Accession number :
- 140087432
- Full Text :
- https://doi.org/10.1080/02626667.2019.1662021