Vol16 No.6: 1381-1395
【Title】Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China
【Author】HUANG Fa-rong1,2,3; YANG Tao1,4; LI Qian1,4; LI Si-si4; LI Lan-hai1,2,3,4*; Suwannee ADSAVAKULCHAI5
【Addresses】1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2 Ili station for Watershed Ecosystem Research, Chinese Academy of Sciences, Urumqi 830011, China; 3 Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, Urumqi 830011, China; 4 University of Chinese Academy of Sciences, Beijing 100049, China; 5 School of Engineering, University of the Thai Chamber of Commerce, Bangkok 10400, Thailand
【Corresponding author】LI Lan-hai
【Citation】Huang FR, Yang T, Li Q, et al. (2019) Reference evapotranspiration concentration and its relationship with precipitation concentration at southern and northern slopes of Tianshan Mountains, China. Journal of Mountain Science 16(6). https://doi.org/10.1007/s11629-018-5159-z
【Abstract】The investigation of concentration characteristics of reference evapotranspiration (ETref) 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 ETrefand the relationship between ETrefconcentration and precipitation concentration at sub-monthly timescale based on the daily data by using the time series of 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 CIof ETrefis about 0.40 and less concentrated than precipitation in the study area. At the southern slope, the maximum ETrefappears in late June and is earlier than the maximum precipitation (early July), ETrefdistributes 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 ETrefand precipitation appear in early July, and ETrefis more dispersed than precipitation. During the study period, the maximum ETrefat the northern slope tends to appear earlier due to the impacts of wind speed, relative humidity, sunshine duration, and air temperature. ETrefconcentration does not match the precipitation concentration in the study area, particularly at the southern slope. The mismatch between ETrefand precipitation concentration within a year reveals the water resources pressure on environmental, social and economic sustainability in the study area.
【Keywords】Concentration; Reference evapotranspiration; Precipitation; Trend analysis; Tianshan Mountains