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Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China
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Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China
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Journal Article
Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China
2019
Overview
The investigation of concentration characteristics of reference evapotranspiration (
ET
ref
) is important for water resources management. The concentration index (CI), concentration degree (CD) and concentration period (CP) are used to investigate the concentration characteristics of
ET
ref
and the relationship between
ET
ref
concentration and precipitation concentration at sub-monthly timescale based on the daily climatic variables from 1966 to 2015 in 27 meteorological stations at the southern and northern slopes of Tianshan Mountains in China. It was found that the CI of
ET
ref
is about 0.40 and less concentrated than precipitation in the study area. At the southern slope, the maximum
ET
ref
appears in late June and is earlier than the maximum precipitation (early July),
ET
ref
distributes more equally than precipitation, and the CI, CD and CP of these two variables do not show significant change based on the Mann-Kendall test. At the northern slope, both the maximum
ET
ref
and precipitation appear in early July, and
ET
ref
is more dispersed than precipitation. During the study period, the maximum
ET
ref
at the northern slope tends to appear earlier due to the impacts of wind speed, relative humidity, sunshine duration, and air temperature.
ET
ref
concentration does not match the precipitation concentration in the study area, particularly at the southern slope. The mismatch between
ET
ref
and precipitation concentration within a year reveals the water resources pressure on environmental, social and economic sustainability in the study area.
Publisher
Science Press,Springer Nature B.V
Subject
