Title :
Analysis of temporal trends in potential evaportranspiration over Heihe River basin
Author :
Xiaoping Wang ; Zhao, Chuanyan
Author_Institution :
Key Lab. of Arid Climate Change & Reducing, Inst. of Arid Meteorol. Lanzhou, Lanzhou, China
Abstract :
Based on the Penman-Monteith formula recommended by FAO (Food and Agriculture Organization), calculated the potential evapotranspiration of all stations in Heihe River basin in 49 years. The research data included he monthly average temperatures, average maximum temperature, average minimum temperature, wind speed, relative humidity, wind speed, hours of sunshine and solar radiation from 1960 to 2009. The change characteristics of evapotranspiration were analyzed by using trend analysis and Mann-Kendall abrupt tests. The results showed that the ET0 is increasing in the upper reaches and fluctuating in middle and lower reaches. The abrupt point is 1979 in middle reaches and in 1983 in middle reaches. While there is no obvious abrupt point in upper reaches.
Keywords :
atmospheric humidity; atmospheric temperature; evaporation; sunlight; transpiration; wind; AD 1960 to 2009; China; Heihe River basin; Mann-Kendall abrupt tests; Penman-Monteith formula; abrupt point; average maximum temperature; average minimum temperature; monthly average temperatures; potential evapotranspiration; relative humidity; solar radiation; sunshine hours; temporal trend analysis; wind speed; Ocean temperature; Rivers; Solar radiation; Temperature distribution; Water resources; Wind speed; Heihe river basin; Mann-Kendall abrupt test; Penman-Monteith formular; potential evapotranspiration;
Conference_Titel :
Water Resource and Environmental Protection (ISWREP), 2011 International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-339-1
DOI :
10.1109/ISWREP.2011.5893130
